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Environmentally Friendly Perovskite-Based Photovoltaics and Luminescence: Lead Less or Lead Free

SOLAR RRL (2023)

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Article Chemistry, Physical

Thermal-evaporation-deposited CsCu2I3 films with self-trapped excitons for electrically driven yellow light-emitting diodes

Zhuangzhuang Ma et al.

Summary: The ternary copper halide CsCu2I3 shows potential for the development of environmentally friendly LEDs. High-quality CsCu2I3 films were successfully fabricated using a thermal evaporation technique with post-annealing treatment, and device performance was improved through optimization of the device structure.

JOURNAL OF ALLOYS AND COMPOUNDS (2023)

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Article Chemistry, Multidisciplinary

Highly stable lanthanide-doped CsPbI3 perovskite nanocrystals with near-unity quantum yield for efficient red light-emitting diodes

Wenlin Xia et al.

Summary: This study introduces small-sized rare earth La cations to improve the phase stability of CsPbI3 perovskite nanocrystals and achieve high emission efficiency in optoelectronic devices. The interaction between La and I ions in the CsPbI3 lattice effectively suppresses trap states and promotes radiative recombination, resulting in near-unity photoluminescence quantum yield. The La-doped nanocrystals also exhibit high energy bands, enabling efficient hole injection. The superior optoelectronic properties of La-doped CsPbI3 nanocrystals greatly enhance the performance of perovskite light-emitting diodes.

NANOSCALE (2023)

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Article Chemistry, Multidisciplinary

Anisotropic Growth of Centimeter-Size CsCu2I3 Single Crystals with Ultra-Low Trap Density for Aspect-Ratio-Dependent Photodetectors

Sancan Han et al.

Summary: In this study, 2 cm size CsCu2I3 single crystals with tunable aspect ratio and low trap states were fabricated using an optimized anti-solvent vapor-assisted method. The rapid and anisotropic growth mechanism was attributed to preferential 1D growth, and the aspect-ratio-dependent optoelectronic performance was observed, showing high performance among lead-free perovskite-based photodetectors.

ADVANCED SCIENCE (2023)

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Review Chemistry, Physical

Metal Halide Perovskite Nanowires: Synthesis, Integration, Properties, and Applications in Optoelectronics

Daquan Zhang et al.

Summary: This article provides a systematic review of recent progress in the synthesis, integration, property characterization, and advanced optoelectronic applications of one-dimensional metal halide perovskite nanowires. It discusses the methods used to synthesize these nanowires, as well as techniques for integrating them into nanowire arrays. The article also highlights the enhanced stability and superior optoelectronic properties of these nanowires, enabling excellent performance in various optoelectronic devices.

ADVANCED ENERGY MATERIALS (2023)

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Article Nanoscience & Nanotechnology

Substitution of Ethylammonium Halides Enabling Lead-Free Tin- Based Perovskite Solar Cells with Enhanced Efficiency and Stability

Yuanfang Huang et al.

Summary: In this work, the roles of three ethylammonium halides (EAX, X = Cl, Br, I) in Sn-based perovskites and solar cells were explored. It was found that the EACl-modified device achieved the best crystallinity, lowest defect density, and excellent antioxidant capacity, leading to a champion PCE of 12.50%. Furthermore, the encapsulated device showed excellent shelf stability and retained its initial efficiency even after 100 hours of continuous light illumination.

ACS APPLIED MATERIALS & INTERFACES (2023)

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Article Chemistry, Multidisciplinary

Two-Dimensional Cs2AgInxBi1-xCl6 Alloyed Double Perovskite Nanoplatelets for Solution-Processed Light-Emitting Diodes

Zhenyang Liu et al.

Summary: This study demonstrates the synthesis of 2D Cs2AgInxBi1-xCl6 alloyed double perovskite nanoplatelets with controlled morphology and composition. The obtained NPLs show unique optical properties and good stability, making them suitable for solution-processing in low-cost device manufacturing. Solution-processed light-emitting diodes using Cs2AgIn0.9Bi0.1Cl6 alloyed double perovskite NPLs as the emitting component exhibit good performance.

ADVANCED MATERIALS (2023)

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Article Multidisciplinary Sciences

Controlled growth of perovskite layers with volatile alkylammonium chlorides

Jaewang Park et al.

Summary: Controlling the crystallinity and surface morphology of perovskite layers is crucial for achieving high-efficiency perovskite solar cells. By adding alkylammonium chlorides (RACl) to a-formamidinium lead iodide (FAPbI(3)), the crystallization process and surface morphology of the perovskite thin films can be controlled. The resulting perovskite thin layers facilitate the fabrication of perovskite solar cells with a high power-conversion efficiency of 26.08%.

NATURE (2023)

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Article Materials Science, Multidisciplinary

Nickel-bromide passivation strategy enabled highly efficient blue-emitting CsPbBr3 nanoplates for monochrome LED application

Ji 'an Song et al.

Summary: This research proposed a nickel-bromide passivation strategy to improve the optical properties and chemical stability of blue emitting CsPbBr3 nanoplatelets. By repairing the surface Br- vacancies and enhancing the structural stability of CsPbBr3 lattice through Ni2+ doping, the emission efficiency of the nanoplatelets increased from 33.2% to 78%, and they can be stored for 30 days without significant PL loss. A liquid-type monochrome LED device fabricated using the passivated CsPbBr3 nanoplatelets as blue color convector showed no emission saturation even at a high driving current of 190 mA.

OPTICAL MATERIALS (2023)

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Article Chemistry, Physical

DMSO-Free Solvent Strategy for Stable and Efficient Methylammonium-Free Sn-Pb Alloyed Perovskite Solar Cells

Zhanfei Zhang et al.

Summary: A DMSO-free solvent strategy using N,N'-dimethylpropyleneurea (DMPU) is demonstrated to improve the performance and stability of Cs(0.25)FA(0.75)Pb(0.5)Sn(0.5)I(3) solar cells by suppressing precursor oxidation and uncontrolled crystallization. The DMPU-based solvent forms complete complexes with organic and inorganic components, leading to enlarged grain size and improved film crystallinity. The resulting Sn-Pb alloyed device achieves a record efficiency of 22.41% and exhibits improved humidity and thermal stability.

ADVANCED ENERGY MATERIALS (2023)

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Article Chemistry, Physical

Suppressing Disproportionation Decomposition in Sn-Based Perovskite Light-Emitting Diodes

Xiang Guan et al.

Summary: In recent years, nontoxic Sn-based perovskite light-emitting diodes (Pero LEDs) have shown rapid development. However, the preparation of high-quality Sn-based perovskite films is challenging due to the heavy self-doping of Sn4+. This study reveals that the disproportionation decomposition of Sn2+ during the annealing process is critical in degrading device performance. By introducing formamidine thiocyanate as a thermal-sacrificial agent, efficient Sn-based Pero-LEDs with a maximum external quantum efficiency of 5.3% and ultralow efficiency roll-off were achieved.

ACS ENERGY LETTERS (2023)

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Article Chemistry, Multidisciplinary

Synergistic Surface Modification of Tin-Lead Perovskite Solar Cells

Shuaifeng Hu et al.

Summary: In this study, it is found that the surface treatment of mixed tin-lead halide perovskite films with piperazine promotes charge extraction, and combined treatment with CPTA reduces hysteresis and improves efficiency and stability of solar cells.

ADVANCED MATERIALS (2023)

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Article Chemistry, Multidisciplinary

Highly Luminescent One-Dimensional Organic-Inorganic Hybrid Double-Perovskite-Inspired Materials for Single-Component Warm White-Light-Emitting Diodes

Tianxin Bai et al.

Summary: Double perovskites (DPs) are promising candidates for white light-emitting diodes (WLEDs) due to their intrinsic broadband emission. In this study, a series of highly luminescent one-dimensional DP-inspired materials were synthesized using a fluorinated organic cation, and efficient warm-white photoluminescence was achieved. By doping a small amount of antimony ion, lead-free metal-halide WLEDs with superior performance were fabricated.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2023)

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Article Multidisciplinary Sciences

Tautomeric mixture coordination enables efficient lead-free perovskite LEDs

Dongyuan Han et al.

Summary: Lead-free perovskite light-emitting diodes prepared using tautomeric mixture coordination show improved ordering in the crystal structure, reduced recombination, and enhanced exciton binding energy.

NATURE (2023)

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Review Optics

Metal Halide Perovskite for next-generation optoelectronics: progresses and prospects

He Dong et al.

Summary: This review examines the research milestones and optoelectronic devices of metal halide perovskites (MHPs) and emphasizes their unique optoelectronic features. It highlights the tunability of these features through regulating the phase, dimensionality, composition, and geometry of MHPs. The review also showcases the design of optoelectronic devices with target performance using the convenient property control of MHPs. Furthermore, it emphasizes the revolutionary applications of MHPs-based devices in existing optoelectronic systems, and it is expected to inspire novel research directions and widespread applications of MHPs in next-generation optoelectronics.

ELIGHT (2023)

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Article Chemistry, Multidisciplinary

Highly Efficient Hole Transport Layer-Free Low Bandgap Mixed Pb-Sn Perovskite Solar Cells Enabled by a Binary Additive System

Hongki Kim et al.

Summary: Efficient band bending and defect engineering at the interface between perovskite and indium tin oxide (ITO) were achieved using a binary additive system with CuSCN and GlyHCl in simplified HTL-free mixed Pb-Sn perovskite solar cells. The optimized band alignment with the addition of GlyHCl improved hole extraction efficiency, resulting in a high efficiency of up to 20.1% under forward bias without hysteresis.

ADVANCED FUNCTIONAL MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Miniaturized Multispectral Detector Derived from Gradient Response Units on Single MAPbX3 Microwire

Xiaobao Xu et al.

Summary: This study reports a miniaturized multispectral detector based on optical-component-free microwires. The MAPbX(3) microwires with gradient composition can achieve multispectral sensing and discrimination.

ADVANCED MATERIALS (2022)

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Article Chemistry, Multidisciplinary

Dual-Band-Tunable White-Light Emission from Bi3+/Te4+ Emitters in Perovskite-Derivative Cs2SnCl6 Microcrystals

Wei Zhang et al.

Summary: In this study, a new class of highly efficient and dual-band-tunable white-light emitters based on Bi3+/Te4+ co-doped perovskite derivative Cs2SnCl6 microcrystals was reported. The microcrystals exhibited broad dual-band white-light emission originating from the inter-configurational transitions of Bi3+ and Te4+, with good stability and a high photoluminescence quantum yield.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Chemistry, Multidisciplinary

Wide-Bandgap Perovskite Quantum Dots in Perovskite Matrix for Sky-Blue Light-Emitting Diodes

Yuan Liu et al.

Summary: This study developed a novel CsPbBr3 QD-in-perovskite matrix solid that exhibited high luminescent efficiency and spectral stability. The modulation of perovskite E-g and the passivation of the material were achieved through alloying and specific coordination, leading to enhanced air- and photo-stability.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2022)

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Article Chemistry, Multidisciplinary

White light emission from lead-free mixed-cation doped Cs2SnCl6 nanocrystals

Samrat Das Adhikari et al.

Summary: By doping Cs2SnCl6 nanocrystals with different metal ions, we have successfully synthesized nanocrystals that emit blue, yellow, red, and white light. These nanocrystals have high photoluminescence efficiency, excellent stability, and can emit pure white light under different excitation wavelengths.

NANOSCALE (2022)

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Article Optics

Cation disorder engineering yields AgBiS2 nanocrystals with enhanced optical absorption for efficient ultrathin solar cells

Yongjie Wang et al.

Summary: This study investigates the enhanced optical absorption of a ternary chalcogenide semiconductor through engineering cation disorder, which enables the development of highly efficient extremely thin absorber photovoltaic devices. The experimental results demonstrate that colloidal nanocrystals with engineered cation disorder show a significantly higher absorption coefficient compared to other photovoltaic materials, offering a promising solution for environmentally friendly and solution-processed solar cells.

NATURE PHOTONICS (2022)

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Article Materials Science, Multidisciplinary

Near-Unity Quantum Yield and Superior Stable Indium-Doped CsPbBrxI3-x Perovskite Quantum Dots for Pure Red Light-Emitting Diodes

Xin Zhou et al.

Summary: The study introduces In3+ ion doping in CsPbBrxI3-x perovskite quantum dots, achieving a near-unity photoluminescence quantum yield and superior stability. The doped PeQDs exhibit higher luminance, fivefold external quantum efficiency improvement, and increased stability compared to pristine LEDs, suggesting promising applications in advanced light emitters for solid-state lighting and displays.

ADVANCED OPTICAL MATERIALS (2022)

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Article Materials Science, Multidisciplinary

Applications of Lead-Free Cs2AgBiBr6 Single Crystals in Photodetectors and Self-Powered Photodetectors by Symmetric/Asymmetric Electrodes

Danda Hao et al.

Summary: Lead halide hybrid perovskites have been extensively studied as light-harvesting materials due to their unique optoelectrical characteristics and easy deposition method. However, toxicity and stability issues have hindered their further development. In this study, stable lead-free Cs2AgBiBr6 single crystals with excellent photoelectric properties were prepared. Symmetric Au electrodes resulted in photodetectors with broad spectral response, high responsivity, external quantum efficiency, and detectivity. Interestingly, asymmetric electrodes (Au and Ag) led to the development of the first self-driven photodetector based on the lead-free perovskite single crystals, showing good photoresponse properties at 0 V bias. Both devices demonstrated short response times at the microsecond scale and good stability without encapsulation, indicating great potential for optoelectronic device applications.

ADVANCED OPTICAL MATERIALS (2022)

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Article Materials Science, Multidisciplinary

White-light defect emission and enhanced photoluminescence efficiency in a 0D indium-based metal halide

Qidi Ran et al.

Summary: This study developed a novel In3+-based (C6H8N)(6)InBr9 single crystal that exhibits intrinsic white-light emission at room temperature. By embedding Sb3+ ions into the lattice, broadband orange emission with a high quantum yield was achieved, providing insights for designing novel materials with excellent photoluminescence properties.

JOURNAL OF MATERIALS CHEMISTRY C (2022)

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Article Chemistry, Physical

Near-unity blue luminance from lead-free copper halides for light-emitting diodes

Xiaoyun Liu et al.

Summary: This study introduces a novel copper halide luminescent material and successfully synthesizes its single crystals and polycrystalline films. The material exhibits high photoluminescence quantum yield and stability, along with broadband blue emission characteristics. The research also proposes new design and synthesis strategies for future applications in white light-emitting diodes and full-color displays.

NANO ENERGY (2022)

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Article Chemistry, Multidisciplinary

Lead-free Double Perovskite Cs2AgIn0.9Bi0.1Cl6 Quantum Dots for White Light-Emitting Diodes

Yuqing Zhang et al.

Summary: A novel lead-free double perovskite quantum dots were successfully fabricated for white light-emitting diodes with excellent optoelectronic performance and stability. The device exhibits good luminous properties and stability, making it suitable for future lighting applications.

ADVANCED SCIENCE (2022)

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Article Chemistry, Multidisciplinary

Boosting the Self-Trapped Exciton Emission in Alloyed Cs2(Ag/Na)InCl6 Double Perovskite via Cu+ Doping

Xingwen Cheng et al.

Summary: This study reports a unique strategy to achieve efficient self-trapped exciton (STE) emission in alloyed lead-free Cs-2(Ag/Na)InCl6 double perovskites through Cu+ doping. A small amount of Cu+ doping enhances the STE emission in the crystals, and the underlying mechanism is investigated by temperature-dependent photoluminescence and femtosecond transient absorption spectroscopy.

ADVANCED SCIENCE (2022)

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Review Chemistry, Physical

Insights into the Development of Monolithic Perovskite/Silicon Tandem Solar Cells

Bingbing Chen et al.

Summary: Perovskite/silicon tandem solar cells have high potential in photovoltaic systems but face challenges such as low conversion efficiency and poor stability. Overcoming the limitations of the top cell and utilizing encapsulation can help improve efficiency.

ADVANCED ENERGY MATERIALS (2022)

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Article Nanoscience & Nanotechnology

Passivation Layer of Potassium Iodide Yielding High Efficiency and Stable Deep Red Perovskite Light-Emitting Diodes

Cheng Chen et al.

Summary: This study proposes improving the optical properties of CsPbI3:Sr emissive layer (EML) in perovskite light-emitting diodes (PeLEDs) by inserting an additional potassium iodide (KI) passivation layer. The results demonstrate that the use of a KI layer can lead to high-performance PeLEDs with higher quantum efficiency and longer lifetime.

ACS APPLIED MATERIALS & INTERFACES (2022)

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Article Chemistry, Multidisciplinary

Boosting Near-Infrared Luminescence of Lanthanide in Cs2AgBiCl6 Double Perovskites via Breakdown of the Local Site Symmetry

Yifan Pei et al.

Summary: A new class of NIR-emitting double perovskites based on Ln(3+)-doped Cs-2(Na/Ag)BiCl6 has been developed, realizing effective NIR emissions of Ln(3+) through Bi3+ sensitization. Na+-induced breakdown of local site symmetry in Cs2AgBiCl6 DPs leads to enhanced NIR emissions, providing fundamental insights for versatile optoelectronic applications.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Chemistry, Multidisciplinary

Stable Lead-Free Tin Halide Perovskite with Operational Stability >1200 h by Suppressing Tin(II) Oxidation

Qinggang Zhang et al.

Summary: Efficient and stable lead-free Cs4SnBr6 perovskite was synthesized using SnF2 as tin source, leading to excellent optical properties and stability. This paves a new pathway for the development of high-performance light emitters using lead-free perovskite.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Chemistry, Inorganic & Nuclear

Tunable Dual Emission in Bi3+/Te4+-Doped Cs2HfCl6DoublePerovskites for White Light-Emitting Diode Applications

Wei Yang et al.

Summary: In this study, a co-doping strategy was employed to incorporate Bi3+ and Te4+ into Cs2HfCl6 perovskite, resulting in microcrystals with bright blue, yellow, and warm white emissions. The co-doped Cs2HfCl6 exhibited efficient dual emission due to the typical3P1 -> 1S0 transition emission from Bi3+ and self-trapped excitons (STEs) from Te4+. The concentration-optimized Cs2HfCl6:Te4+ showed excellent stability and high photo-luminescence quantum yield (PLQY). When used in a white light-emitting diode (WLED), the Bi3+/Te4+ co-doped Cs2HfCl6 produced warm white light with a high color rendering index (CRI) and correlated color temperature (CCT).

INORGANIC CHEMISTRY (2022)

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Article Optics

Enhanced photoluminescence efficiencies of CsPbCl3-xBrx nanocrystals by incorporating neodymium ions

Jiamin Xiong et al.

Summary: This study presents an effective strategy to enhance the photoluminescence quantum yield (PLQY) and stability of blue and violet perovskite nanocrystals (NCs) by incorporating Nd3+ ions. The results show that Nd3+ doping reduces defect states and improves the water stability of the NCs. Further post-treatment with anion exchange reaction leads to an extended emission range and significantly increased maximum PLQY.

JOURNAL OF LUMINESCENCE (2022)

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Article Optics

A facile strategy to synthesize high colour purity blue luminescence aluminium-doped CsPbBr3 perovskite quantum dots

Fanju Zeng et al.

Summary: Researchers successfully synthesized aluminum ion-doped CsPbBr3 perovskite quantum dots through a supersaturated recrystallization approach, finding that the particle size and lattice spacing of the quantum dots decrease as the aluminum ion mole ratio increases, resulting in a significant blueshift in luminescence. High color purity blue emission was achieved at an Al/Pb ratio of 1.0, demonstrating good stability.

JOURNAL OF LUMINESCENCE (2022)

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Article Chemistry, Multidisciplinary

Regulating the Singlet and Triplet Emission of Sb3+ Ions to Achieve Single-Component White-Light Emitter with Record High Color-Rendering Index and Stability

Fei Zhang et al.

Summary: This study presents a facile ion-doping technology to synthesize an efficient single-component white-light emitter Cs2ZrCl6:Sb. The introduction of Sb3+ ions stimulates the emission of singlet and triplet states, resulting in a high-quality white emission. Stable white-light-emitting diodes with a record half-lifetime of 2003 hours were successfully fabricated using Cs2ZrCl6:1.5%Sb as the down conversion phosphor. This research offers an effective ion-doping strategy for the design of single-component white-light emitters, making practical applications in lighting technologies possible.

NANO LETTERS (2022)

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Article Nanoscience & Nanotechnology

Heterogeneous FASnI3 Absorber with Enhanced Electric Field for High-Performance Lead-Free Perovskite Solar Cells

Tianhao Wu et al.

Summary: Lead-free tin perovskite solar cells have shown rapid development and promising efficiency, with the fabrication of a formamidinium tin iodide perovskite absorber with a vertical Sn2+ gradient to enhance the built-in electric field. The depth-dependent X-ray photoelectron spectroscopy revealed an increase in efficiency and open-circuit voltage for the tin PSCs, even after continuous operation under 1-sun illumination for 1,000 hours.

NANO-MICRO LETTERS (2022)

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Article Materials Science, Multidisciplinary

A Synergetic Codoping Strategy Enabling Performance Improvement of Pure-Blue Perovskite Quantum Dots Light-Emitting Diodes

Jiangyong Pan et al.

Summary: By codoping Mn2+ and Ni2+ in CsPb(Br1.8Cl1.2), the photoluminescence quantum yield (PLQY) and thermal stability of blue PeQDLEDs are improved, and the hole injection barrier is reduced, providing a new pathway for achieving efficient and stable pure blue PeQDLEDs.

ADVANCED OPTICAL MATERIALS (2022)

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Article Chemistry, Physical

Ultrastable and highly efficient green-emitting perovskite quantum dot composites for Mini-LED displays or backlights

Tongtong Xuan et al.

Summary: This study reports on ultrastable CsPbBr3:Sr/PbBr(OH)/molecular sieve composites with high photoluminescence quantum yield and overall stability. These composites can resist attacks from water, blue light, and heat, and are also suitable for producing high-efficiency Mini-LED backlights.

NANO ENERGY (2022)

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Article Chemistry, Multidisciplinary

Marked Efficiency Improvement of FAPb0.7Sn0.3Br3 Perovskite Light-Emitting Diodes by Optimization of the Light-Emitting Layer and Hole-Transport Layer

Lufeng Hu et al.

Summary: Highly luminescent FAPb(0.7)Sn(0.3)Br(3) nanocrystals were synthesized with an average photoluminescence quantum yield of 92%, making them suitable luminescent layers for PeLEDs. Double hole-transport layers play a crucial role in improving the electrical-to-optical conversion efficiency of PeLEDs, with TFB/PVK double HTLs significantly enhancing EQE.

NANOMATERIALS (2022)

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Article Chemistry, Multidisciplinary

All-Inorganic Manganese-Based CsMnCl3 Nanocrystals for X-Ray Imaging

Lin-Quan Guan et al.

Summary: Lead-based halide perovskite nanomaterials with excellent optical properties have been widely studied for applications in solar cells, light-emitting diodes, lasing, and X-ray imaging. However, the toxicity of lead has led researchers to explore alternative materials. In this study, all-inorganic manganese-based perovskite derivatives were successfully synthesized, and the introduction of a small amount of lead greatly improved photoluminescence intensity and quantum yield. These nanomaterials also showed high-efficiency X-ray absorption and radioluminescence, making them promising candidates for X-ray imaging.

ADVANCED SCIENCE (2022)

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Article Chemistry, Physical

Smooth and Compact FASnI3 Films for Lead-Free Perovskite Solar Cells with over 14% Efficiency

Zihao Zhu et al.

Summary: By introducing trimethylthiourea (3T) as a ligand during spin coating, the quality of FASnI3 films was improved significantly, leading to enhanced carrier lifetime and open-circuit voltage, approaching those of lead halide perovskites. These findings are important for film deposition control and future developments of tin halide perovskites.

ACS ENERGY LETTERS (2022)

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Article Multidisciplinary Sciences

Ultra-bright, efficient and stable perovskite light-emitting diodes

Joo Sung Kim et al.

Summary: This study reports the development of ultra-bright, efficient, and stable light-emitting diodes (PeLEDs) made of core/shell perovskite nanocrystals. The nanocrystals, obtained through in situ reaction of benzylphosphonic acid with polycrystalline perovskite films, demonstrate strong carrier confinement and maintain good charge-transport properties.

NATURE (2022)

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Article Materials Science, Ceramics

Highly efficient blue emissive copper halide Cs5Cu3Cl6I2 scintillators for X-ray detection and imaging

Xiaowei Niu et al.

Summary: In this study, a high-performance and low-cost Cs5Cu3Cl6I2 scintillator was prepared by mechanical grinding, which exhibited excellent luminescent properties, radiation stability, and high efficiency in X-ray detection and imaging.

CERAMICS INTERNATIONAL (2022)

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Article Nanoscience & Nanotechnology

Defect Passivation on Lead-Free CsSnI3 Perovskite Nanowires Enables High-Performance Photodetectors with Ultra-High Stability

Zheng Gao et al.

Summary: Defect passivation method was adopted to fabricate ultra-stable and high-performance CsSnI3 nanowires photodetectors. BMIM+ ions effectively passivate the Sn-related defects and reduce the dark current, leading to a significant enhancement in device performance.

NANO-MICRO LETTERS (2022)

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Article Chemistry, Physical

Rapid and Large-Scale Preparation of Stable and Efficient White Light Emissive Perovskite Microcrystals Using Ionic Liquids

Mengyan Cao et al.

Summary: In this work, stable Sb3+ and Bi3+ codoped Cs2ZrCl6 microcrystals were prepared on a large scale for highly efficient white light emission using ionic liquids. The dual emissions originate from the associated self-trapped excitons of the [SbCl6](3-) and [BiCl6](3-) octahedra. The method allows for facile synthesis of large batches of microcrystalline powders and shows potential for future applications in the lighting field.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2022)

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Review Engineering, Electrical & Electronic

Recent advances of eco-friendly quantum dots light-emitting diodes for display

Gaoyu Liu et al.

Summary: Quantum dots (QDs) have outstanding properties of wide and flexibly tunable emission range, high color saturation, and cost-effectiveness, making them promising candidates in the display field. However, most QDs used in high-performance display devices contain toxic elements such as cadmium (Cd) or lead (Pb). In recent years, the application of eco-friendly QDs in light-emitting diodes (LEDs) has been vigorously explored, with efforts in material engineering and device architecture. The review summarizes the recent research progress of three major projects implemented on four types of eco-friendly QDs, including existing challenges, possible solutions, and their feedback on device performance, aiming to provide guidance for the further development of eco-friendly QLEDs.

PROGRESS IN QUANTUM ELECTRONICS (2022)

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Article Multidisciplinary Sciences

Hydrogenated Cs2AgBiBr6 for significantly improved efficiency of lead-free inorganic double perovskite solar cell

Zeyu Zhang et al.

Summary: The authors report hydrogenated lead-free inorganic perovskite solar cells with enhanced power conversion efficiency. By using a hydrogenation method, the bandgap of Cs2AgBiBr6 films could be tunable from 2.18 eV to 1.64 eV, resulting in improved photoelectric conversion efficiency of the solar cells.

NATURE COMMUNICATIONS (2022)

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Article Chemistry, Multidisciplinary

Carbazole-Containing Polymer-Assisted Trap Passivation and Hole-Injection Promotion for Efficient and Stable CsCu2I3-Based Yellow LEDs

Zhuangzhuang Ma et al.

Summary: Perovskite light-emitting diodes (LEDs) are promising light sources for future lighting and display technologies. However, achieving yellow electroluminescence, environmental stability, and lead toxicity are challenges. By incorporating a hole-transporting polymer into the CsCu2I3 emitter, the electroluminescent performance of the LEDs is improved, resulting in significantly enhanced device performances. The external quantum efficiency of the yellow LEDs is increased by 8.5 times, and the half-lifetime reaches 14.6 hours, making them the most stable yellow LEDs based on perovskite systems reported so far.

ADVANCED SCIENCE (2022)

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Article Chemistry, Physical

Bright Lead-Free Inorganic CsSnBr3 Perovskite Light-Emitting Diodes

Jung -Min Heo et al.

Summary: By introducing co-additives, the number of nucleation sites in CsSnBr3 film can be increased, resulting in uniform films with improved defect passivation. This approach can significantly increase the brightness and device lifetime of perovskite light-emitting diodes.

ACS ENERGY LETTERS (2022)

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Article Chemistry, Physical

High-Performance Copper-Doped Perovskite-Related Silver Halide X-ray Imaging Scintillator

Tengyue He et al.

Summary: This article describes the development of high-performance and flexible X-ray scintillators based on Cu-doped Cs2AgI3 films, which exhibit ultrahigh X-ray sensitivity. The materials have high scintillation light yield and low detection limit, making them suitable for cost-effective, ecofriendly, and flexible X-ray detection.

ACS ENERGY LETTERS (2022)

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Article Chemistry, Physical

Efficient MA-free Pb-Sn alloyed low-bandgap perovskite solar cells via surface passivation

Tingming Jiang et al.

Summary: Lead-tin alloyed low-bandgap perovskite solar cells (PSCs) are critical for all-perovskite tandem solar cells. While current high-efficiency Pb-Sn mixed PSCs typically contain over 30 mol% of volatile methylammonium (MA) cations, this study explores the use of MA-free compositions to improve the thermal and operational stability. By growing an ultrathin layer of phenethylammonium iodide (PEAI) on top of the MA-free FA(0.83)Cs(0.17)Pb(0.5)Sn(0.5)I(3)film, the researchers observed enhanced charge carrier lifetime, reduced Sn2+ oxidation, and improved electron transportation, resulting in improved efficiency and open-circuit voltage for the treated PSCs.

NANO ENERGY (2022)

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Article Materials Science, Multidisciplinary

High quality lead-free perovskites toward white light emitting diodes and X-ray imaging

Shuangpeng Yan et al.

Summary: Lead-free metal halide perovskites are emerging candidates for white light emitting diodes and X-ray imaging. This study focuses on the synthesis of Cs2HfCl6: Te4+ crystals and explores their performance in advanced devices. The crystals exhibit specific emission wavelength, wide emission bandwidth, and efficient energy transfer process, enabling the manufacturing of high-performance white light emitting diodes and X-ray imaging with good characteristics.

JOURNAL OF MATERIALS CHEMISTRY C (2022)

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Article Optics

Revealing the output power potential of bifacial monolithic all-perovskite tandem solar cells

Hongjiang Li et al.

Summary: This article demonstrates, for the first time, the bifacial monolithic all-perovskite tandem solar cells and reveals their high output power potential under real-world conditions.

ELIGHT (2022)

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Article Chemistry, Multidisciplinary

Optimized carrier extraction at interfaces for 23.6% efficient tin-lead perovskite solar cells

Shuaifeng Hu et al.

Summary: In this study, carrier extraction in mixed tin-lead perovskite solar cells is improved by modifying the surfaces with ethylenediammonium diiodide and glycine hydrochloride. The modified solar cells show improved performance and stability, with efficiencies of up to 23.6% and retaining over 80% of initial efficiency after 200 hours of continuous operation.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Review Chemistry, Multidisciplinary

Lead-Free Double Perovskite Cs2AgInCl6

Ying Liu et al.

Summary: Lead-free halide perovskites, particularly Cs2AgInCl6 double perovskites, have attracted attention as alternatives to toxic and unstable lead-based materials due to their intriguing optical properties. Researchers are exploring various synthesis methods and alloy compositions, while also conducting computational studies to better understand the stability and photoluminescence characteristics of these materials.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

High Color-Rendering Index and Stable White Light-Emitting Diodes by Assembling Two Broadband Emissive Self-Trapped Excitons

Zhuangzhuang Ma et al.

Summary: This study introduces a two-component strategy using two broadband emissive materials with self-trapped excitons (STEs) to produce high CRI and stable WLEDs. By synthesizing copper-based ternary halides composites, the research demonstrates cold/warm tunable WLEDs with high CRI and excellent stability. These results highlight the potential of using hybrids of STEs-derived broadband emissive materials for high-performance WLEDs.

ADVANCED MATERIALS (2021)

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Article Chemistry, Physical

Development of lead-free Cu2BiI5 rudorffite thin films for visible light photodetector application

Anjali Adappattu Ramachandran et al.

Summary: In this study, Cu2BiI5 thin films were successfully fabricated and evaluated for their potential application as a lead-replacement material in optoelectronic devices. The films displayed stability, nearly stoichiometric composition, and the ability to potentially absorb light in the visible-NIR region.

APPLIED SURFACE SCIENCE (2021)

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Article Chemistry, Physical

Tuning the Optical Absorption of Sn-, Ge-, and Zn-Substituted Cs2AgBiBr6 Double Perovskites: Structural and Electronic Effects

Paz Sebastia-Luna et al.

Summary: Lead-free halide double perovskites are highly tunable materials with promising optical properties. Substitution of divalent metal cations in Cs2AgBiBr6 can effectively narrow the bandgap, making them potential candidates for photovoltaic solar cells.

CHEMISTRY OF MATERIALS (2021)

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Article Chemistry, Inorganic & Nuclear

Multi-Dopant Engineering in Perovskite Cs2SnCl6: White Light Emitter and Spatially Luminescent Heterostructure

Yu Zhong et al.

Summary: In this study, Bi3+/Te4+ co-doped Cs2SnCl6 with dual emission spectrum was successfully prepared using a modified solution method, leading to adjustable emission color and intensity ratio. The energy transfer distance and efficiency between the two dopants were investigated, and a single-phase white light-emitting diode was fabricated, enriching the research on composition engineering in halide perovskites.

INORGANIC CHEMISTRY (2021)

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Review Energy & Fuels

Lead-Less Halide Perovskite Solar Cells

Liam Gollino et al.

Summary: The rise and commercialization of perovskite solar cells are hindered by the toxicity of lead present in the perovskites as the solar light absorber. To counter this problem, lead can be fully (lead-free) or partially (lead-less) replaced by diverse elements, with partial replacement showing more promising results. Various methods to reduce the lead content in PSCs are discussed, including the partial replacement of lead by elements like Sn, Ge, Sr, and other transition metals. In addition, new families of perovskites based on the insertion of organic cations to replace lead and halogen units are presented, as well as atypical ways to reduce toxicity such as optimizing photon collection and using recycled lead.

SOLAR RRL (2021)

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Article Chemistry, Multidisciplinary

Lead-Free Organic-Perovskite Hybrid Quantum Wells for Highly Stable Light-Emitting Diodes

Kang Wang et al.

Summary: Researchers have developed an efficient and stable LED device using organic semiconductor barrier layers, which enable the conversion of emission energy from the organic layer into higher energy emission from the perovskite layer, leading to improved device performance and stability.

ACS NANO (2021)

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Article Chemistry, Physical

Mg2+-Assisted Passivation of Defects in CsPbI3 Perovskite Nanocrystals for High-Efficiency Photoluminescence

Qiuhong Chen et al.

Summary: A strategy of Mg2+-assisted passivation of surface defects has been reported to enhance the emission efficiency and stability of CsPbI3 perovskite nanocrystals. The treated NCs exhibit high photoluminescence quantum yield and retain a significant portion of their original efficiency after extended atmospheric exposure. Light-emitting diodes based on these treated NCs demonstrate a significant improvement in external quantum efficiency compared to untreated devices.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2021)

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Article Chemistry, Multidisciplinary

Bright Triplet Self-Trapped Excitons to Dopant Energy Transfer in Halide Double-Perovskite Nanocrystals

Muyu Cong et al.

Summary: This study presents a design principle to enhance the photoluminescence of triplet excitons in all-inorganic lead-free double-perovskite nanocrystals. Experimental data show that this design approach results in bright green emission and efficient white-light emitting through energy transfer to dopants.

NANO LETTERS (2021)

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Article Energy & Fuels

Anion effect on properties of Zn-doped CH3NH3PbI3 based perovskite solar cells

Chuanming Tian et al.

Summary: The study introduces a simple method to fabricate high-quality CH3NH3PbI3 films by incorporating different types of zinc salts, which improves the crystallinity and reduces defect densities, enhancing the performance and stability of planar perovskite solar cells. The addition of zinc acetate in particular leads to a champion power conversion efficiency of 19.32% and remarkable stability, retaining 87% of original efficiency after aging for 500 hours under ambient conditions.

SOLAR ENERGY MATERIALS AND SOLAR CELLS (2021)

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Article Multidisciplinary Sciences

Efficient and bright warm-white electroluminescence from lead-free metal halides

Hong Chen et al.

Summary: By introducing an organic additive into the precursor solutions, trap states can be reduced, enhancing the photoluminescence quantum efficiency of metal halide films and increasing the surface potential to facilitate hole injection and transport in LEDs. Therefore, lead-free metal halide LEDs show high brightness and efficiency, making them promising for solution-processed white LED applications.

NATURE COMMUNICATIONS (2021)

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Article Materials Science, Multidisciplinary

2D Cs2AgBiBr6 with Boosted Light-Matter Interaction for High-Performance Photodetectors

Feier Fang et al.

Summary: Lead-free double perovskite Cs2AgBiBr6, fabricated as a 2D material with a thickness of around 5 nm, shows significantly enhanced optoelectronic properties compared to bulk Cs2AgBiBr6. The 2D Cs2AgBiBr6-based photodetectors exhibit ultra-high detectivity, photoresponsivity, and response time, with the added benefit of tunable wavelength-dependent photodetection due to the material's strong photon recycling effect. This research sheds light on the potential high-performance optoelectrical applications of environmentally friendly 2D perovskites.

ADVANCED OPTICAL MATERIALS (2021)

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Article Optics

Controllable one-step doping synthesis for the white-light emission of cesium copper iodide perovskites

Ranran Fan et al.

Summary: This paper successfully adopts a controllable one-step doping method in the luminescence of cesium copper iodide perovskite, achieving high-quality white-light emission. By adding impurities, stable CsCu2I3 is synthesized, allowing for the coexistence of different high luminescence phases to realize efficient white lighting. The coexistence of blue-emitting Cs3Cu2I5 and yellow-emitting CsCu2I3 without interaction enables the acquisition of a single emission and highly efficient white lighting.

PHOTONICS RESEARCH (2021)

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Review Chemistry, Physical

All-Inorganic Lead-Free Perovskite(-Like) Single Crystals: Synthesis, Properties, and Applications

Shuangyi Zhao et al.

Summary: Due to their nontoxicity, stability, and unique optoelectronic properties, all-inorganic lead-free halide semiconductors with perovskite and perovskite-like structures have emerged as promising optoelectronic materials for various applications, with a focus on the enhanced performances of ILFP single crystals compared to low dimensional and polycrystalline ILFP materials.

SMALL METHODS (2021)

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Article Chemistry, Multidisciplinary

Synthesis of 0D Manganese-Based Organic-Inorganic Hybrid Perovskite and Its Application in Lead-Free Red Light-Emitting Diode

Siyu Yan et al.

Summary: Lead-based perovskite light-emitting diodes (PeLEDs) exhibit excellent performance, while in order to develop more environmentally friendly perovskite materials, researchers have developed a novel manganese-based organic-inorganic hybrid perovskite with superior performance and stability compared to other lead-free PeLEDs.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Green Perovskite Light-Emitting Diodes with 200 Hours Stability and 16% Efficiency: Cross-Linking Strategy and Mechanism

Boning Han et al.

Summary: A methylene-bis-acrylamide cross-linking strategy is proposed to enhance the stability of perovskite light-emitting diodes (PeLEDs) by increasing the binding energy and activation energy, thereby preventing ions from migrating inside and across crystals. This strategy not only improves the external quantum efficiency, but also extends the half-life of the devices, making them more stable during continuous operation.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Enhanced Optical Properties and Stability of CsPbBr3 Nanocrystals Through Nickel Doping

Hayeong Kim et al.

Summary: By optimizing the structural and optical properties of CsPbBr3 perovskite nanocrystals through Ni doping, the Ni-doped PNCs demonstrate stronger light emission, higher quantum efficiency, and longer lifetimes. The doped divalent element acts as a defect in the perovskite structure, reducing the recombination rate of electrons and holes and improving stability. Ni:CsPbBr3 PNCs exhibit better efficiency and superior luminance compared to CsPbBr3 PNCs, showing promise for future improvements in display device performance.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Multidisciplinary Sciences

Stable and Efficient Red Perovskite Light-Emitting Diodes Based on Ca2+-Doped CsPbI3 Nanocrystals

Wei Shen et al.

Summary: By doping Ca2+ in alpha-CsPbI3 nanocrystals, the stability and optoelectronic properties of the material have been significantly improved, demonstrating the potential of Ca2+ doping strategy in high-quality CsPbI3 NC LEDs.

RESEARCH (2021)

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Article Chemistry, Physical

Cu2+-Doped CsPbI3 Nanocrystals with Enhanced Stability for Light-Emitting Diodes

Zhuo Chen et al.

Summary: The enhanced stability of CsPbI3 nanocrystals is achieved by incorporating Cu2+ ions into the lattice, resulting in improved device performance of Cu2+-doped quantum-dot light-emitting diodes (QLEDs) compared to undoped counterparts. The Cu2+-doped QLED shows significantly reduced turn-on voltage and higher luminance, offering great potential for future applications with further optimization.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2021)

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Review Energy & Fuels

Lead Sources in Perovskite Solar Cells: Toward Controllable, Sustainable, and Large-Scalable Production

Chenxin Ran et al.

Summary: This review systematically summarizes the latest research on the key role of Pb source in improving the performance of perovskite solar cells, and discusses the impact of different Pb sources on the crystallization kinetics and photovoltaic characteristics of perovskite films. The significant role of Pb source in producing large-scale PSCs in a controllable and sustainable manner is highlighted, offering insights for the future commercialization of PSCs and raw material engineering in various optoelectronic devices.

SOLAR RRL (2021)

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Article Chemistry, Multidisciplinary

The Influence of Spontaneous Oxidative Conversion on the Characteristics of Lead-Free Halide Perovskite CsSn(IxBr1-x)3 and on the Performance of Perovskite Light-Emitting Diodes

Wei-Li Hong et al.

Summary: Lead-free perovskite CsSn(IxBr1-x)(3) films with photoluminescence emission wavelengths in the range of 677 to 887 nm were prepared in this study. The influence of air exposure on their characteristics was investigated, revealing that CsSnI3 can transform into Cs2SnI6 with increased exposure. The degraded performance of devices based on CsSn(IxBr1-x)(3) films with higher Br- ratio and CsSnI3 films with prolonged air exposure time is mainly attributed to the energy levels of their MOs. Defect density of state and binding energy of these materials were also explored and reported.

ADVANCED MATERIALS INTERFACES (2021)

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Article Chemistry, Multidisciplinary

Enhanced Photoluminescence and Photoresponsiveness of Eu3+ Ions-Doped CsPbCl3 Perovskite Quantum Dots under High Pressure

Xiaoling Jing et al.

Summary: This study reports the unique optical and electrical properties of Eu3+-doped CsPbCl3 QDs under high pressure, showing an enhancement of the PL of Eu3+ ions up to 10.1 GPa and preserving a relatively high intensity at 22 GPa. The pressure-induced PL enhancement of Eu3+ ions is associated with the enhanced energy transfer rate from excitonic state to Eu3+ ions. The compression-induced enhancement of photoelectric performance can be attributed to decreased defect density and increased carrier mobility.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Amplifying Surface Energy Difference toward Anisotropic Growth of All-Inorganic Perovskite Single-Crystal Wires for Highly Sensitive Photodetector

Yuan Chen et al.

Summary: By amplifying the surface energy difference through a chemical potential dependent strategy, CsPbBr3 perovskite monocrystalline wires with high aspect ratio were successfully grown. The anisotropic growth of the wires was achieved by regulating the anti-solvent diffusion kinetic and the mass transfer kinetic control of metal halide salts. The produced PWs exhibit high photodetection responsivity and external quantum efficiency, revealing the crucial role of surface energy in the anisotropic growth of CsPbBr3 PWs.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Enhancing Performance and Stability of Tin Halide Perovskite Light Emitting Diodes via Coordination Engineering of Lewis Acid-Base Adducts

Ye Jin Heo et al.

Summary: In order to address toxicity issues of Pb-based perovskites, Sn-based perovskites have been studied as a promising alternative due to their similar valence electron configuration. However, the oxidation of Sn2+ to Sn4+ in the precursor solution and films has been a problem. This study proposes N,N'-dimethylpropyleneurea (DMPU) as a Lewis base to suppress the oxidation of Sn2+ and improve the performance and stability of Sn-based perovskite light emitting diodes (PeLEDs). The optimized PeLED based on DMPU achieved significantly enhanced luminance and external quantum efficiency compared to devices without DMPU, providing a promising method for developing high-performance and eco-friendly PeLEDs using Sn perovskites.

ADVANCED FUNCTIONAL MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Efficient Blue Light Emitting Diodes Based On Europium Halide Perovskites

Jiajun Luo et al.

Summary: This study introduces a lead-free perovskite, CsEuBr3, which displays bright blue exciton emission at 448 nm with color coordinates of (0.15, 0.04) originating from specific transitions. It demonstrates high performance characteristics including short excited-state lifetime, excellent exciton diffusion diffusivity, and high quantum yield. This material is used to construct deep-blue PeLEDs with high efficiency and longevity, aiming to inspire further research in lanthanide-based perovskites for next-generation LED applications.

ADVANCED MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Heterogeneous 2D/3D Tin-Halides Perovskite Solar Cells with Certified Conversion Efficiency Breaking 14%

Bin-Bin Yu et al.

Summary: By modulating the microstructure of 2D/3D heterogeneous tin-perovskite absorber films through substituting FAI with FPEABr, the oxidation of Sn2+ to Sn4+ and defect density were effectively suppressed, leading to a remarkable increase in conversion efficiency from 9.38% to 14.81%.

ADVANCED MATERIALS (2021)

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Review Chemistry, Multidisciplinary

Lead-Free Perovskite Photodetectors: Progress, Challenges, and Opportunities

Yiqi Zhang et al.

Summary: Although lead-based photodetectors have unique and superior optoelectronic properties, their poor stability necessitates the substitution of lead with non-toxic elements to achieve comparable performance and long-term stability. Developing lead-free perovskite photodetectors shows promise for practical applications in various fields such as optical communication, image sensing, and narrowband photodetection.

ADVANCED MATERIALS (2021)

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Article Chemistry, Multidisciplinary

Dendritic CsSnI3 for Efficient and Flexible Near-Infrared Perovskite Light-Emitting Diodes

Jianxun Lu et al.

Summary: This paper proposes managing charge injection and recombination behavior in CsSnI3-based Pero-LEDs by tuning the interface area of perovskite and charge-transporter. By utilizing a dendritic CsSnI3 structure, efficient lead-free NIR Pero-LEDs are achieved with a record external quantum efficiency of 5.4%. The dendritic structure also shows superiorities in flexible devices, maintaining almost no morphology change even after 2000 cycles of bends, and retaining 93.4% of initial EQEs after 50 cycles of bends.

ADVANCED MATERIALS (2021)

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Article Physics, Applied

Halide ion migration in lead-free all-inorganic cesium tin perovskites

Gaoyu Liu et al.

Summary: This study investigated the halogen ion migration in lead-free all-inorganic perovskite Cs2SnX6, showing that the perovskite is relatively stable and has no obvious ion migration under certain electric field or light conditions. The calculated results indicate a high long-term ion migration barrier and the Sn-X bond strength plays a role in the stability of Cs2SnX6. These findings provide a new understanding of ion migration mechanism and offer insights for optoelectronic applications.

APPLIED PHYSICS LETTERS (2021)

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Article Engineering, Environmental

Ni2+-doped CsPbI3 perovskite nanocrystals with near-unity photoluminescence quantum yield and superior structure stability for red light-emitting devices

Menglong Liu et al.

Summary: The successful incorporation of Ni2+ ions into the CsPbI3 lattice leads to improved photoluminescence quantum yield and enhanced stability. The Ni2+-doped CsPbI3 nanocrystals can retain their red luminescence for up to 15 days and 7 months in atmosphere.

CHEMICAL ENGINEERING JOURNAL (2021)

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Article Chemistry, Multidisciplinary

Organic Dye/Cs2AgBiBr6 Double Perovskite Heterojunction Solar Cells

Baoning Wang et al.

Summary: The photovoltaic performance of Cs2AgBiBr6 perovskite was improved by introducing indoline dyes, leading to higher power conversion efficiencies and short-circuit current densities in the hybrid cells. The double perovskite functioned as a p-type interlayer to enhance overall performance.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

Zero-Dimensional Organic-Inorganic Hybrid Copper-Based Halides with Highly Efficient Orange-Red Emission

Shaofan Fang et al.

Summary: Lead-free copper-based halide materials, such as PEA(4)Cu(4)I(4), exhibit efficient orange-red broad emission with high PLQY. These materials have zero-dimensional structures, large exciton binding energies, and Huang-Rhys factors, leading to efficient self-trapped exciton emissions. A prototype orange-red LED device has been successfully fabricated, demonstrating the potential of copper-based halide materials in lighting and display applications.

SMALL (2021)

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Article Multidisciplinary Sciences

Germanium-lead perovskite light-emitting diodes

Dexin Yang et al.

Summary: The research demonstrates highly luminescent germanium-lead (Ge-Pb) perovskite films with considerably improved photoluminescence quantum efficiencies compared to other lead-based perovskite films, offering a new solution for developing eco-friendly light-emitting technologies based on perovskite semiconductors.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Physical

Highly stable CsPbI3:Sr2+ nanocrystals with near-unity quantum yield enabling perovskite light-emitting diodes with an external quantum efficiency of 17.1%

Cheng Chen et al.

Summary: The Sr2+-doped CsPbI3 nanocrystals synthesized in this study exhibit enhanced stability and near-unity photoluminescence quantum yield (PLQY), maintaining high PLQY even after surface ligand removal by a polar solvent. Films prepared with a mixture of EA and octane show high PLQY and excellent stability, leading to red-emitting PeLEDs with a world-record peak external quantum efficiency (EQE) of 17.1%.

NANO ENERGY (2021)

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Article Chemistry, Physical

Lead-Free Halide Light-Emitting Diodes with External Quantum Efficiency Exceeding 7% Using Host-Dopant Strategy

Gijun Seo et al.

Summary: Lead-free halide light-emitting diodes (LEDs) utilizing CsCu2I3 achieve strong yellow emission, with extremely thin host-dopant emitters formed by VTE process to enhance photoluminescence quantum yield. By successful spatial localization of charge carriers and excitons, a record-breaking lead-free halide LED with EQE of 7.4% is fabricated, demonstrating high stability in device operation.

ACS ENERGY LETTERS (2021)

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Article Materials Science, Multidisciplinary

Mn2+-Doped CsPbI3 Nanocrystals for Perovskite Light-Emitting Diodes with High Luminance and Improved Device Stability

Menglong Liu et al.

Summary: Incorporating Mn2+ dopants into the perovskite lattice can significantly improve the stability of alpha-CsPbI3 and increase the photoluminescence quantum yield. Mn2+: CsPbI3 maintains high luminescence performance even after 45 days of exposure to air, in contrast to the rapid loss of luminescence in undoped CsPbI3. Additionally, introducing a LiF buffer layer can further enhance the device performance, particularly in terms of luminance and T-50 lifetime.

ADVANCED PHOTONICS RESEARCH (2021)

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Article Chemistry, Multidisciplinary

Ni2+ and Pr3+ Co-doped CsPbCl3 perovskite quantum dots with efficient infrared emission at 1300 nm

Jiekai Lyu et al.

Summary: This study successfully increased the luminescence intensity and achieved emission at 1300 nm by co-doping transition metal and rare earth ions into PQDs. The Ni2+ and Pr3+ co-doped CsPbCl3 PQDs showed enhanced emission intensity at 400 nm and 1300 nm, with an overall PLQY of 89% and the highest infrared PLQY of 23%.

NANOSCALE (2021)

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Article Materials Science, Multidisciplinary

Eu2+ ions as an antioxidant additive for Sn-based perovskite light-emitting diodes

Xi Wang et al.

Summary: Doping Sn-based perovskite film with Eu2+ ions can improve the external quantum efficiency and brightness of LEDs, while reducing crystalline defect density.

JOURNAL OF MATERIALS CHEMISTRY C (2021)

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Article Nanoscience & Nanotechnology

Effects of CsSnxPb1-xI3 Quantum Dots as Interfacial Layer on Photovoltaic Performance of Carbon-Based Perovskite Solar Cells

Chi Zhang et al.

Summary: In this study, inorganic tin-doped perovskite quantum dots were integrated into carbon-based perovskite solar cells to enhance their photovoltaic performance. The energy level and acceptor concentration of the tin-doped PQDs were adjusted to improve band alignment, electron-hole pair separation, and hole extraction efficiency. The power conversion efficiency was increased from 12.80% to 14.22% after incorporating CsSn0.2Pb0.8I3 quantum dots, showing the potential for enhancing PSCs performance.

NANOSCALE RESEARCH LETTERS (2021)

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Article Engineering, Electrical & Electronic

All-Inorganic Perovskite Quantum Dots Based on InX3-Trioctylphosphine Oxide Hybrid Passivation Strategies for High-Performance and Full-Colored Light-Emitting Diodes

Yanni Sun et al.

Summary: This study focused on the preparation of highly stable CsPbX3 PeQD films using InX3 and TOPO as surface passivation ligands, which resulted in PeQDs with high photoluminance quantum yields and long-term stability. Full-colored perovskite QLEDs based on InX3-TOPO-CsPbX3 PeQDs achieved high EQE and luminance, showcasing a promising strategy for efficient, stable, and color-tunable perovskite QLEDs.

ACS APPLIED ELECTRONIC MATERIALS (2021)

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Article Materials Science, Multidisciplinary

CsMnBr3: Lead-Free Nanocrystals with High Photoluminescence Quantum Yield and Picosecond Radiative Lifetime

Jawaher Almutlaq et al.

Summary: Lead-free CsMnBr NCs exhibit a high photoluminescence quantum yield and an exceptionally short radiative lifetime, making them a promising material for optoelectronic applications.

ACS MATERIALS LETTERS (2021)

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Article Materials Science, Multidisciplinary

All-solution-processed, highly efficient and stable green light-emitting devices based on Zn-doped CsPbBr3/ZnS heterojunction quantum dots

Pan Wang et al.

Summary: In this study, Zn-doped CsPbBr3/ZnS QDs were successfully fabricated, enhancing the optical properties and stability of the perovskite QDs films without compromising their semiconductor properties. By using n-ZnO NPs and p-NiO NPs as carrier transport layers, high-efficiency and stable all-inorganic Zn-doped CsPbBr3/ZnS QLEDs were achieved.

JOURNAL OF MATERIALS SCIENCE (2021)

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Review Chemistry, Physical

Tin Halide Perovskites: Progress and Challenges

Wen-Fan Yang et al.

ADVANCED ENERGY MATERIALS (2020)

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Article Chemistry, Physical

Electrically-Driven Violet Light-Emitting Devices Based on Highly Stable Lead-Free Perovskite Cs3Sb2Br9 Quantum Dots

Zhuangzhuang Ma et al.

ACS ENERGY LETTERS (2020)

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Article Nanoscience & Nanotechnology

Bright Blue Light Emission of Ni2+ Ion-Doped CsPbClxBr3-x Perovskite Quantum Dots Enabling Efficient Light-Emitting Devices

Gencai Pan et al.

ACS APPLIED MATERIALS & INTERFACES (2020)

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Article Chemistry, Multidisciplinary

Bionic Detectors Based on Low-Bandgap Inorganic Perovskite for Selective NIR-I Photon Detection and Imaging

Fei Cao et al.

ADVANCED MATERIALS (2020)

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Review Chemistry, Multidisciplinary

Recent Developments in Lead-Free Double Perovskites: Structure, Doping, and Applications

Kashyap Dave et al.

CHEMISTRY-AN ASIAN JOURNAL (2020)

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Article Chemistry, Physical

Origin and tunability of dual color emission in highly stable Mn doped CsPbCl3 nanocrystals grown by a solid-state process

Joydip Ghosh et al.

JOURNAL OF COLLOID AND INTERFACE SCIENCE (2020)

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Article Chemistry, Physical

Efficient Two-Dimensional Tin Halide Perovskite Light-Emitting Diodes via a Spacer Cation Substitution Strategy

Zhibin Wang et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2020)

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Article Multidisciplinary Sciences

Ultra-high open-circuit voltage of tin perovskite solar cells via an electron transporting layer design

Xianyuan Jiang et al.

NATURE COMMUNICATIONS (2020)

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Article Chemistry, Physical

MACl-Assisted Ge Doping of Pb-Hybrid Perovskite: A Universal Route to Stabilize High Performance Perovskite Solar Cells

Gyu Min Kim et al.

ADVANCED ENERGY MATERIALS (2020)

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Article Chemistry, Physical

Emission Trend of Multiple Self-Trapped Excitons in Luminescent 1D Copper Halides

Mao-Hua Du

ACS ENERGY LETTERS (2020)

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Article Chemistry, Multidisciplinary

Stable Yellow Light-Emitting Devices Based on Ternary Copper Halides with Broadband Emissive Self-Trapped Excitons

Zhuangzhuang Ma et al.

ACS NANO (2020)

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Article Materials Science, Multidisciplinary

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Tunable Near-Infrared Luminescence in Tin Halide Perovskite Devices

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