4.7 Article

Bidentate oxalate ion enhancing water-resistant stability and exciton recombination behavior of blue CsPb(Br/Cl)3 quantum dots

Related references

Note: Only part of the references are listed.
Article Engineering, Environmental

Ligands for CsPbBr3 perovskite quantum dots: The stronger the better?

Yang Liu et al.

Summary: Surface ligands play important roles in the growth and stability of quantum dots (QDs). This study investigates the influence of dodecylbenzene sulfonic (DBSA) ligand on perovskite QDs (PQDs). The results show that DBSA-capped PQDs exhibit abnormally ripening under high-temperature conditions. A new mechanism for ion migration suppression is proposed based on internal lattice relaxation and inter-particle migration pathway elimination. However, the external quantum efficiency of the corresponding light-emitting devices is poor, which could be attributed to the unbalanced colloidal stability and film conductivity.

CHEMICAL ENGINEERING JOURNAL (2023)

Article Nanoscience & Nanotechnology

CsPbBr3 Nanocrystals Stabilized by Lead Oxysalts for Photocatalytic CO2 Reduction

Yuhan Wang et al.

Summary: A facile method is demonstrated to eliminate undercoordinated Pb2+ sites on the surface of CsPbBr3, improving its stability and photocatalytic activity for CO2 reduction.

ACS APPLIED NANO MATERIALS (2023)

Article Engineering, Environmental

Pb2+ doped CsCdBr3 perovskite nanorods for pure-blue light-emitting diodes

Jie Guo et al.

Summary: Research shows that doping CsCdBr3 NRs with Pb2+ can significantly improve their optoelectronic properties, resulting in a blue emission with a quantum yield of 48% and centered at 459 nm. Additionally, using the optimized NRs as the emissive layer, a blue perovskite LED based on 1D NRs was successfully fabricated.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Materials Science, Multidisciplinary

Suppression of halide migration and immobile ionic surface passivation for blue perovskite light-emitting diodes

Chan Beom Park et al.

Summary: Cs-based perovskite nanocrystals (PeNCs) are excellent emitters for perovskite light-emitting diodes (PeLEDs) due to their remarkable optoelectronic properties. In this study, a surface passivation strategy using potassium thiocyanate was proposed to improve the structure and optical properties of PeNCs. The strategy significantly enhanced the photoluminescence quantum yield and colloidal stability of PeNCs, leading to high efficiency and long lifetime PeLEDs.

JOURNAL OF MATERIALS CHEMISTRY C (2022)

Article Nanoscience & Nanotechnology

Stable CsPbX3 (Br/Cl) Perovskite Nanocrystal Layer Passivated with Al-Doped CdSe for Blue Light-Emitting Diodes

Muhammad Amin Padhiar et al.

Summary: Perovskite nanocrystals (PNCs) with adjustable emission bands and high photoluminescence are ideal for optical devices. This study introduces a simple strategy to enhance the stability of blue-light emitting PNCs, achieving highly stable PNCs with changes in bandgaps and PLQY values. The doped PNCs show potential for use as color converters in liquid crystal displays (LCDs) and demonstrate remarkable stability under various ambient conditions.

ACS APPLIED NANO MATERIALS (2022)

Review Engineering, Environmental

CsPbX3 (X = Cl, Br, I) perovskite quantum dots embedded in glasses: Recent advances and perspectives

Sixing Li et al.

Summary: CsPbX3 QDs@glass, with tunable emission, high-efficiency luminescence, narrow-band emission, and high stability, has a wide range of applications in optoelectronic devices, photocatalysis, and sensors. This review introduces the synthesis method, photoluminescence mechanism, spectral modulation, and application of CsPbX3 QDs@glass, and discusses the challenges it faces in future application.

CHEMICAL ENGINEERING JOURNAL (2022)

Article Chemistry, Multidisciplinary

Enriched-Bromine Surface State for Stable Sky-Blue Spectrum Perovskite QLEDs With an EQE of 14.6%

Hanwen Zhu et al.

Summary: Enriched-bromine surface state is achieved through anion exchange with PbBr2 stock solution in Cd-doped perovskite quantum dots, leading to improved efficiency and stability of perovskite QLEDs.

ADVANCED MATERIALS (2022)

Article Chemistry, Physical

Bifunctional Molecule Enables High-Quality CsPb(Br/CI)3 Nanocrystals for Efficient and Stable Pure-Blue Perovskite Light-Emitting Diodes

Siqi Sun et al.

Summary: In this study, high-quality CsPb(Br/Cl)3 PeNCs were synthesized using a bifunctional molecule, which exhibited high photoluminescence efficiency and spectral stability, making it suitable for blue light-emitting diode fabrication.

ACS ENERGY LETTERS (2022)

Article Multidisciplinary Sciences

Perovskite QLED with an external quantum efficiency of over 21% by modulating electronic transport

Tao Fang et al.

Summary: This study demonstrates green perovskite QLEDs with improved efficiency and operational lifetime by balancing charge injection, showing high color saturation and excellent external quantum efficiency. Modulating charge balance significantly enhances the operational lifetime of the devices, further highlighting the potential of perovskite QLEDs for practical applications.

SCIENCE BULLETIN (2021)

Article Chemistry, Multidisciplinary

Rational Surface-Defect Control via Designed Passivation for High-Efficiency Inorganic Perovskite Solar Cells

Xiaojing Gu et al.

Summary: Iodine vacancies and undercoordinated Pb2+ are the main causes of nonradiative charge recombination in all-inorganic perovskite films, while passivation with histamine (HA) significantly reduces surface trap density and prolongs charge lifetime, leading to an increased solar cell efficiency.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

Article Engineering, Environmental

Surface ligand engineering-assisted CsPbI3 quantum dots enable bright and efficient red light-emitting diodes with a top-emitting structure

Min Lu et al.

Summary: By replacing oleic acid ligands with octylphosphonic acid in the synthesis of perovskite QDs, the performance of the QDs was successfully improved, leading to enhanced fluorescence quantum efficiency and solution stability, as well as increased electrical conductivity of QD films. This ultimately resulted in highly efficient red perovskite QD LEDs with significantly improved luminance compared to LEDs based on pristine CsPbI3 QDs.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Optics

Comprehensive defect suppression in perovskite nanocrystals for high-efficiency light-emitting diodes

Young-Hoon Kim et al.

Summary: In this study, a one-dopant alloying strategy was employed to enhance electroluminescence efficiencies of metal halide perovskite nanocrystals (PNCs) by reducing defect formation and enhancing charge carrier confinement. Surface-stabilizing agents and bromide vacancy healing agents were utilized to decrease defect density and improve carrier confinement, resulting in significant enhancement in performance.

NATURE PHOTONICS (2021)

Article Materials Science, Multidisciplinary

Deep Blue Layered Lead Perovskite Light-Emitting Diode

Siyu Yan et al.

Summary: The two-dimensional layered lead perovskite with high deep blue photoluminescence quantum yield provides a route to fabricate stable and high-performance deep blue emission PeLEDs, surpassing previously reported devices in brightness and efficiency.

ADVANCED OPTICAL MATERIALS (2021)

Article Chemistry, Physical

Bidentate Lewis bases are preferred for passivation of MAPbI3 surfaces: A time-domain ab initio analysis

Jinlu He et al.

Summary: Chemical passivation is an effective method to inhibit intrinsic defects in perovskite solar cells, with bidentate ligands showing the best performance in separating charges and increasing charge lifetimes. Unlike traditional semiconductors, common defects in metal halide perovskites do not create deep midgap states, but localize electrons and holes around defect sites to enhance electron-hole interaction. Understanding this physical mechanism and principles guiding the choice of passivating molecules can lead to further improvements in the performance of metal halide perovskites in solar energy and optoelectronic applications.

NANO ENERGY (2021)

Article Engineering, Environmental

Highly stable and luminescent silica-coated perovskite quantum dots at nanoscale-particle level via nonpolar solvent synthesis

Fei Gao et al.

Summary: By assembling CsPbBr3 QDs into SiO2 shell and introducing hydrophobic molecules, monodisperse CsPbBr3@SiO2 and CsPbBr0.6I2.4@SiO2 nanocomposites with high photoluminescence quantum yield were successfully prepared, showing excellent stability and photoluminescence efficiency.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Multidisciplinary Sciences

Ligand-engineered bandgap stability in mixed-halide perovskite LEDs

Yasser Hassan et al.

Summary: By utilizing multidentate ligands to treat mixed-halide perovskite nanocrystals, efficient and color-stable red electroluminescence with a wavelength centered at 620 nanometers and an external quantum efficiency of 20.3% has been achieved. The key function of the ligand treatment is to 'clean' the nanocrystal surface by removing lead atoms, which suppresses the formation of iodine Frenkel defects and halide segregation. This work demonstrates the sensitivity of metal halide perovskites to surface properties and provides a pathway to control surface defect formation and migration, crucial for achieving bandgap stability for light emission and potentially impacting other optoelectronic applications.

NATURE (2021)

Article Optics

Suppression of temperature quenching in perovskite nanocrystals for efficient and thermally stable light-emitting diodes

Mingming Liu et al.

Summary: Fluoride-treated CsPbBr3 nanocrystals exhibit near unity emission efficiency at temperatures up to 373 K, with constant decay kinetics. The treatment leads to surfaces rich in fluorine with wider energy gaps than the core, suppressing carrier trapping and improving thermal stability. Devices incorporating these nanocrystals show low turn-on voltage and high external quantum efficiency, with nearly 80% efficiency maintained at high temperatures, offering a promising pathway for high-performance light-emitting diodes based on perovskite nanostructures.

NATURE PHOTONICS (2021)

Article Chemistry, Physical

Ultra-low EQE roll-off and marvelous efficiency perovskite quantum-dots light-emitting-diodes achieved by ligand passivation

Yuliang Ye et al.

Summary: By introducing sodium dodecyl sulfate (SDS), PQDs with excellent properties were synthesized, effectively suppressing the efficiency roll-off of QLEDs. The SDS-based PQDs films showed enhanced radiative recombination, reduced trap density, and increased carrier mobility, leading to balanced charge carriers at high current density and significantly suppressed efficiency roll-off. QLEDs fabricated with SDS-capped PQDs exhibited improved maximum brightness and external quantum efficiency, with EQE roll-off optimized in the thickness of emitting layer, achieving a prominent achievement in this strategy.

NANO ENERGY (2021)

Article Engineering, Environmental

High luminescence and external quantum efficiency in perovskite quantum-dots light-emitting diodes featuring bilateral affinity to silver and short alkyl ligands

Wei-Cheng Chen et al.

Summary: The exchange of silver ligands on perovskite quantum dots improved photoluminescence quantum yield and stability, leading to better performance in optoelectronic devices.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Engineering, Environmental

Room-temperature synthesis of perovskite-phase CsPbI3 nanocrystals for optoelectronics via a ligand-mediated strategy

Tiantian Wang et al.

Summary: A ligand-mediated strategy was proposed to synthesize gamma-phase CsPbI3 perovskite NCs in non-polar solvent at room temperature for the first time. This method showed superior universality as evidenced by the successful synthesis of efficient red-green-blue CsPbX3 NCs, indicating that room-temperature synthesis could avoid the tediousness of typical hot-injection at high temperatures.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Engineering, Environmental

Stable blue perovskite light-emitting diodes achieved by optimization of crystal dimension through zinc bromide addition

Zhen-Li Yan et al.

Summary: The study investigated the effect of adding ZnBr2 to low-dimensional perovskite structures on crystal morphology and optical properties. The results demonstrate that the addition of ZnBr2 can enhance the stability of blue LEDs, leading to higher luminance and external quantum efficiency, as well as excellent spectral stability on external excitation.

CHEMICAL ENGINEERING JOURNAL (2021)

Article Materials Science, Multidisciplinary

Spectrally Stable Ultra-Pure Blue Perovskite Light-Emitting Diodes Boosted by Square-Wave Alternating Voltage

Zhifang Tan et al.

ADVANCED OPTICAL MATERIALS (2020)

Article Chemistry, Multidisciplinary

Efficient and Spectrally Stable Blue Perovskite Light-Emitting Diodes Based on Potassium Passivated Nanocrystals

Fei Yang et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

Article Nanoscience & Nanotechnology

Mn-doped CsPb(Br/Cl)3 mixed-halide perovskites for CO2 photoreduction

Yu-Wei Liu et al.

NANOTECHNOLOGY (2020)

Article Multidisciplinary Sciences

Water-resistant perovskite nanodots enable robust two-photon lasing in aqueous environment

Siqi Li et al.

NATURE COMMUNICATIONS (2020)

Article Materials Science, Multidisciplinary

Dry Mechanochemical Synthesis of Highly Luminescent, Blue and Green Hybrid Perovskite Solids

Laura Martinez-Sarti et al.

ADVANCED OPTICAL MATERIALS (2020)

Article Chemistry, Physical

The Role of Grain Boundaries on Ionic Defect Migration in Metal Halide Perovskites

Nga Phung et al.

ADVANCED ENERGY MATERIALS (2020)

Article Nanoscience & Nanotechnology

Bipolar-shell resurfacing for blue LEDs based on strongly confined perovskite quantum dots

Yitong Dong et al.

NATURE NANOTECHNOLOGY (2020)

Article Chemistry, Multidisciplinary

CsPbBr3 Quantum Dots 2.0: Benzenesulfonic Acid Equivalent Ligand Awakens Complete Purification

Dandan Yang et al.

ADVANCED MATERIALS (2019)

Article Nanoscience & Nanotechnology

Ultrastable Carbon Quantum Dots-Doped MAPbBr3 Perovskite with Silica Encapsulation

Jingxi Wang et al.

ACS APPLIED MATERIALS & INTERFACES (2019)

Article Chemistry, Multidisciplinary

General Mild Reaction Creates Highly Luminescent Organic-Ligand-Lacking Halide Perovskite Nanocrystals for Efficient Light-Emitting Diodes

Bin-Bin Zhang et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

Article Chemistry, Multidisciplinary

Doping-Enhanced Short-Range Order of Perovskite Nanocrystals for Near-Unity Violet Luminescence Quantum Yield

Zi-Jun Yong et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2018)

Article Nanoscience & Nanotechnology

Highly Emissive and Color-Tunable Perovskite Cross-linkers for Luminescent Polymer Networks

Yumeng Xin et al.

ACS APPLIED MATERIALS & INTERFACES (2018)

Article Nanoscience & Nanotechnology

Luminescent Nanofluids of Organometal Halide Perovskite Nanocrystals in Silicone Oils with Ultrastability

Hechun Lin et al.

ACS APPLIED MATERIALS & INTERFACES (2018)

Article Chemistry, Multidisciplinary

Design Principles for Trap-Free CsPbX3 Nanocrystals: Enumerating and Eliminating Surface Halide Vacancies with Softer Lewis Bases

David P. Nenon et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2018)

Article Materials Science, Multidisciplinary

Enhancing the Performance and Stability of Perovskite Nanocrystal Light-Emitting Diodes with a Polymer Matrix

Jae Choul Yu et al.

ADVANCED MATERIALS TECHNOLOGIES (2017)