Synergistic passivation and stepped-dimensional perovskite analogs enable high-efficiency near-infrared light-emitting diodes

Article Chemistry, Multidisciplinary

Formamidinium-based Ruddlesden-Popper perovskite films fabricated via two-step sequential deposition: quantum well formation, physical properties and film-based solar cells

Jing Lu et al.

Summary: This study comprehensively investigates the growth, structure, and optoelectronic properties of FA-based layered perovskites, revealing the influence of FA:PMA ratios and n values on the structure and performance of layered perovskites.

ENERGY & ENVIRONMENTAL SCIENCE (2022)

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Review Engineering, Electrical & Electronic

Perovskite light-emitting diodes

Azhar Fakharuddin et al.

Summary: Light-emitting diodes based on halide perovskites have achieved significant progress in recent years, with external quantum efficiencies surpassing 23%. However, their practical application is still limited due to factors such as low efficiency in blue-emitting devices, inability to access emission wavelengths above 800 nm, decreased external quantum efficiency at high current density, lack of understanding of the electric field's effect on mobile ions in perovskite materials, and short device lifetimes. This review explores the development of perovskite light-emitting diodes, examining the key challenges in creating efficient and stable devices.

NATURE ELECTRONICS (2022)

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Article Optics

Ultrastable near-infrared perovskite light-emitting diodes

Bingbing Guo et al.

Summary: This study demonstrates ultrastable and efficient perovskite light-emitting diodes for near-infrared light source. The introduction of a dipolar molecular stabilizer enhances the stability by preventing phase transformation and decomposition of the perovskite.

NATURE PHOTONICS (2022)

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Review Chemistry, Physical

Metal halide perovskites for light-emitting diodes

Xiao-Ke Liu et al.

Summary: Perovskite emitters have shown promising optoelectronic properties suitable for light-emitting applications, with rapid progress in the development of PeLEDs reaching external quantum efficiencies of over 20%. The key focus is on improving the performance, stability, and reducing toxicity hazards of PeLEDs.

NATURE MATERIALS (2021)

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Article Multidisciplinary Sciences

Distribution control enables efficient reduced-dimensional perovskite LEDs

Dongxin Ma et al.

Summary: By using a fluorinated triphenylphosphine oxide additive to control cation diffusion and passivate surfaces, the efficiency and operating lifetimes of perovskite light-emitting diodes have been improved. Although reduced-dimensional perovskites show promise in increasing stability and photoluminescence quantum yield, challenges such as lower EQEs and inferior color purities remain.

NATURE (2021)

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Article Multidisciplinary Sciences

Smoothing the energy transfer pathway in quasi-2D perovskite films using methanesulfonate leads to highly efficient light-emitting devices

Lingmei Kong et al.

Summary: By incorporating MeS additives to modify quasi-2D RP perovskite films, the structure is reconstructed, energy transfer is enhanced, and defect density is reduced, leading to improved light emission efficiency and device performance.

NATURE COMMUNICATIONS (2021)

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Article Chemistry, Multidisciplinary

Perovskite Light-Emitting Diodes with External Quantum Efficiency Exceeding 22% via Small-Molecule Passivation

Zema Chu et al.

Summary: The functional additive ethoxylated trimethylolpropane triacrylate (ETPTA) can effectively reduce defects in perovskite films, improving the performance of Perovskite light-emitting diodes (PeLEDs) to achieve high external quantum efficiency. These findings provide a simple and effective strategy for producing highly efficient perovskite polycrystalline films and their optoelectronics devices.

ADVANCED MATERIALS (2021)

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Article Multidisciplinary Sciences

High-performance large-area quasi-2D perovskite light-emitting diodes

Changjiu Sun et al.

Summary: The performance of perovskite light-emitting diodes tends to decline as the active area increases, with severe phase-segregation identified as the cause. The introduction of L-Norvaline to construct an intermediate phase has successfully suppressed the phase-segregation, resulting in highly-efficient large-area quasi-2D films.

NATURE COMMUNICATIONS (2021)

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Article Nanoscience & Nanotechnology

Excess Ion-Induced Efficiency Roll-Off in High-Efficiency Perovskite Light-Emitting Diodes

Yongheng Jia et al.

Summary: The mechanism behind EQE roll-off in high-efficiency PeLEDs was investigated, revealing that migration and segregation of excess iodide ions from nonstoichiometric precursors triggered imbalanced charge injection. A simple wash-off treatment with chloroform and an ultra-thin PMMA interlayer were introduced to effectively suppress the roll-off behavior, leading to the achievement of high-brightness PeLEDs with improved performance.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Nanoscience & Nanotechnology

Elucidating the Spatial Dynamics of Charge Carriers in Quasi-Two-Dimensional Perovskites

Dohyung Kim et al.

Summary: The study investigates charge carrier properties in quasi-2D organic-inorganic hybrid perovskites and 3D polycrystalline perovskites using advanced scanning probe microscopy techniques. It reveals slower degradation and local inhomogeneous conduction in quasi-2D perovskites, while higher charge carrier dynamics and stronger potential drop are observed in 3D perovskites. These findings shed light on the underlying mechanisms behind the lower efficiency of quasi-2D perovskites compared to their 3D counterparts.

ACS APPLIED MATERIALS & INTERFACES (2021)

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Article Chemistry, Multidisciplinary

Perovskite Light-Emitting Diodes with EQE Exceeding 28% through a Synergetic Dual-Additive Strategy for Defect Passivation and Nanostructure Regulation

Zhe Liu et al.

Summary: A synergetic dual-additive strategy was used to prepare perovskite films with low defect density and high environmental stability, leading to the formation of perovskite nanocrystals with a quasi-core/shell structure that exhibited improved stability and efficiency in green PeLEDs.

ADVANCED MATERIALS (2021)

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Article Chemistry, Physical

Role of PMMA to make MAPbI3 grain boundary heat-resistant

Tanzila Tasnim Ava et al.

Summary: This study demonstrates that poly (methyl methacrylate) (PMMA) can enhance the thermal stability of perovskite films by altering the chemical composition of grain boundaries to make them more heat-resistant. Hydrated compounds act as catalysts for thermal degradation at grain boundaries, while PMMA absorbs moisture and drives it out, protecting the grain boundaries from degradation.

APPLIED SURFACE SCIENCE (2021)

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Review Optics

Advances in solution-processed near-infrared light-emitting diodes

Maria Vasilopoulou et al.

Summary: Near-infrared light-emitting diodes fabricated by solution-processed means using organic semiconductors, halide perovskites, and colloidal quantum dots have become a promising technological platform for various applications including biomedical, night vision, surveillance, and optical communications. Despite achieving high external quantum efficiencies exceeding 20%, challenges remain in achieving high radiance, reducing efficiency roll-off, and extending operating lifetime. This review summarizes recent advances in emissive materials synthetic methods and device key attributes contributing to improved performance of the fabricated light-emitting devices.

NATURE PHOTONICS (2021)

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Article Chemistry, Multidisciplinary

An Effective Strategy of Combining Surface Passivation and Secondary Grain Growth for Highly Efficient and Stable Perovskite Solar Cells

Dongyu Ma et al.

Summary: A pincer strategy combining surface passivation and secondary grain growth (SGG) was proposed to modify the external and internal of CH3NH3PbI3 perovskite. The modified perovskites showed improved crystallinity, lower trap densities, and tuned energy levels, leading to higher power conversion efficiency (PCE) and enhanced device stability. The strategy provides an effective approach for developing efficient and stable perovskite solar cells (PSCs).

SMALL (2021)

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Article Multidisciplinary Sciences

Identification of lead vacancy defects in lead halide perovskites

David J. Keeble et al.

Summary: Experimental confirmation of lead monovacancy (V-Pb) defects in MAPbI(3) demonstrates their stability and will enable further investigation into defect-driven mechanisms in perovskite photovoltaics.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Unveiling the additive-assisted oriented growth of perovskite crystallite for high performance light-emitting diodes

Lin Zhu et al.

Summary: Solution-processed metal halide perovskites with additives play a crucial role in passivating defects and influencing the crystallization process. By tracking chemical interactions and crystallographic evolution, suitable additives can be found to improve the quality of perovskite films and device performance.

NATURE COMMUNICATIONS (2021)

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Article Multidisciplinary Sciences

Mobile ions determine the luminescence yield of perovskite light-emitting diodes under pulsed operation

Naresh Kumar Kumawat et al.

Summary: The response of perovskite light-emitting diodes under pulsed operation in the range of 10 Hz to 20 kHz reveals that the transient electroluminescence intensity at higher frequencies depends strongly on the duty cycle, with a different origin compared to conventional LEDs. The study highlights the significant impact of mobile ionic charges on the performance of PeLEDs under pulsed operation, particularly in terms of transient electroluminescence intensity.

NATURE COMMUNICATIONS (2021)

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Review Chemistry, Physical

Operational and Spectral Stability of Perovskite Light-Emitting Diodes

Fanghao Ye et al.

Summary: This review analyzes the stability issues of PeLEDs, describes research progress in improving operational stability through defect passivation, charge balance, and thermal management, and discusses future directions for achieving high-performing and stable PeLEDs.

ACS ENERGY LETTERS (2021)

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Article Materials Science, Multidisciplinary

Degradation and self-repairing in perovskite light-emitting diodes

Pengpeng Teng et al.

Summary: One of the critical challenges in perovskite light-emitting diodes (PeLEDs) is poor operational stability, but a unique self-repairing behavior has been discovered where the electroluminescence of moderately degraded PeLEDs can almost completely restore after resting. By understanding the back diffusion of accumulated halides, which repair vacancies in the perovskite layer, the operational stability of PeLEDs can be significantly improved by passivating the key interface.

MATTER (2021)

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Article Chemistry, Multidisciplinary

Beneficial effects of cesium acetate in the sequential deposition method for perovskite solar cells

Byeong Jo Kim et al.

Summary: The addition of cesium acetate (CsAc) effectively stabilizes FAMAPbI(3) perovskite, reduces trap density, extends carrier lifetime, and improves the performance and stability of perovskite solar cells in ambient conditions. The study provides insights into the crucial role of dopants and synthesis precursors in the efficiency and stability of perovskite solar cells.

NANOSCALE (2021)

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Article Chemistry, Multidisciplinary

Role of Excess FAI in Formation of High-Efficiency FAPbI(3)-Based Light-Emitting Diodes

Yong-Heng Jia et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Dual Passivation of Perovskite Defects for Light-Emitting Diodes with External Quantum Efficiency Exceeding 20%

Zhibin Fang et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Degradation Mechanism of Perovskite Light-Emitting Diodes: An In Situ Investigation via Electroabsorption Spectroscopy and Device Modelling

Yuwei Guo et al.

ADVANCED FUNCTIONAL MATERIALS (2020)

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Article Chemistry, Multidisciplinary

Structured Perovskite Light Absorbers for Efficient and Stable Photovoltaics

Tingwei He et al.

ADVANCED MATERIALS (2020)

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Article Multidisciplinary Sciences

Proton-transfer-induced 3D/2D hybrid perovskites suppress ion migration and reduce luminance overshoot

Hobeom Kim et al.

NATURE COMMUNICATIONS (2020)

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Article Multidisciplinary Sciences

Reversible multicolor chromism in layered formamidinium metal halide perovskites

Bryan A. Rosales et al.

NATURE COMMUNICATIONS (2020)

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Article Engineering, Electrical & Electronic

Efficient light-emitting diodes from mixed-dimensional perovskites on a fluoride interface

Baodan Zhao et al.

NATURE ELECTRONICS (2020)

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Article Chemistry, Multidisciplinary

Regulating Surface Termination for Efficient Inverted Perovskite Solar Cells with Greater Than 23% Efficiency

Fengzhu Li et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2020)

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Review Chemistry, Physical

Lewis acid/base approach for efficacious defect passivation in perovskite solar cells

Shurong Wang et al.

JOURNAL OF MATERIALS CHEMISTRY A (2020)

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Article Optics

Rational molecular passivation for high-performance perovskite light-emitting diodes

Weidong Xu et al.

NATURE PHOTONICS (2019)

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Article Chemistry, Multidisciplinary

High-Efficiency Perovskite Light-Emitting Diodes with Synergetic Outcoupling Enhancement

Yang Shen et al.

ADVANCED MATERIALS (2019)

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Article Multidisciplinary Sciences

Unveiling the synergistic effect of precursor stoichiometry and interfacial reactions for perovskite light-emitting diodes

Zhongcheng Yuan et al.

NATURE COMMUNICATIONS (2019)

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Article Multidisciplinary Sciences

Stable and bright formamidinium-based perovskite light-emitting diodes with high energy conversion efficiency

Yanfeng Miao et al.

NATURE COMMUNICATIONS (2019)

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Review Chemistry, Multidisciplinary

Two-Dimensional Hybrid Halide Perovskites: Principles and Promises

Lingling Mao et al.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2019)

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Article Chemistry, Multidisciplinary

Novel Molecular Doping Mechanism for n-Doping of SnO2 via Triphenylphosphine Oxide and Its Effect on Perovskite Solar Cells

Bao Tu et al.

ADVANCED MATERIALS (2019)

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Article Chemistry, Physical

Liquid metal acetate assisted preparation of high-efficiency and stable inverted perovskite solar cells

Yulei Wu et al.

JOURNAL OF MATERIALS CHEMISTRY A (2019)

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Article Energy & Fuels

Simultaneous Cesium and Acetate Coalloying Improves Efficiency and Stability of FA0.85MA0.15PbI3 Perovskite Solar Cell with an Efficiency of 21.95%

Shihao Yuan et al.

SOLAR RRL (2019)

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Article Chemistry, Physical

First-principles study of intrinsic defects in formamidinium lead triiodide perovskite solar cell absorbers

Na Liu et al.

PHYSICAL CHEMISTRY CHEMICAL PHYSICS (2018)

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Article Chemistry, Physical

Lead Vacancy Can Explain the Suppressed Nonradiative Electron-Hole Recombination in FAPbI(3) Perovskite under Iodine-Rich Conditions: A Time-Domain Ab Initio Study

Jinlu He et al.

JOURNAL OF PHYSICAL CHEMISTRY LETTERS (2018)

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Article Multidisciplinary Sciences

Perovskite light-emitting diodes based on spontaneously formed submicrometre-scale structures

Yu Cao et al.

NATURE (2018)

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Article Multidisciplinary Sciences

Perovskite light-emitting diodes with external quantum efficiency exceeding 20 per cent

Kebin Lin et al.

NATURE (2018)

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Article Chemistry, Inorganic & Nuclear

Synthesis, Crystal and Electronic Structures, and Optical Properties of (CH3NH3)2CdX4 (X = Cl, Br, I)

Rachel Roccanova et al.

INORGANIC CHEMISTRY (2017)

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Article Physics, Condensed Matter

A theoretical study of perovskite CsXCl3 ( X= Pb, Cd) within first principles calculations

Bahaa M. Ilyas et al.

PHYSICA B-CONDENSED MATTER (2017)

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Article Chemistry, Multidisciplinary

Stable alpha/delta phase junction of formamidinium lead iodide perovskites for enhanced near-infrared emission

Fusheng Ma et al.

CHEMICAL SCIENCE (2017)

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Article Chemistry, Multidisciplinary

A Bifunctional Lewis Base Additive for Microscopic Homogeneity in Perovskite Solar Cells

Jin-Wook Lee et al.

CHEM (2017)

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Article Nanoscience & Nanotechnology

Enhanced Grain Size, Photoluminescence, and Photoconversion Efficiency with Cadmium Addition during the Two-Step Growth of CH3NH3PbI3

Suneth C. Watthage et al.

ACS APPLIED MATERIALS & INTERFACES (2017)

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Article Chemistry, Physical

Stabilizing Perovskite Structures by Tuning Tolerance Factor: Formation of Formamidinium and Cesium Lead Iodide Solid-State Alloys

Zhen Li et al.

CHEMISTRY OF MATERIALS (2016)

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Article Chemistry, Physical

Ruddlesden-Popper Hybrid Lead Iodide Perovskite 2D Homologous Semiconductors

Constantinos C. Stoumpos et al.

CHEMISTRY OF MATERIALS (2016)

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Article Nanoscience & Nanotechnology

Perovskite energy funnels for efficient light-emitting diodes

Mingjian Yuan et al.

NATURE NANOTECHNOLOGY (2016)

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Article Optics

Perovskite light-emitting diodes based on solution-processed self-organized multiple quantum wells

Nana Wang et al.

NATURE PHOTONICS (2016)

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Article Chemistry, Multidisciplinary

New insights into organic-inorganic hybrid perovskite CH3NH3PbI3 nanoparticles. An experimental and theoretical study of doping in Pb2+ sites with Sn2+, Sr2+, Cd2+ and Ca2+

Javier Navas et al.

NANOSCALE (2015)

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Review Nanoscience & Nanotechnology

Metal-halide perovskites for photovoltaic and light-emitting devices

Samuel D. Stranks et al.

NATURE NANOTECHNOLOGY (2015)

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Article Chemistry, Physical

Photovoltaic Switching Mechanism in Lateral Structure Hybrid Perovskite Solar Cells

Yongbo Yuan et al.

ADVANCED ENERGY MATERIALS (2015)

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Synergistic passivation and stepped-dimensional perovskite analogs enable high-efficiency near-infrared light-emitting diodes

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