Extra long electron–hole diffusion lengths in CH3NH3PbI3−xClx perovskite single crystals

Zhang, Fengying; Yang, Bin; Li, Yajuan; Deng, Wei; He, Rongxing

doi:10.1039/c7tc02802d

Cited by 94 publications

(51 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…If it falls into the first category, then it is excellent for direct light absorption. If it falls into the second category, then it is good for both direct light absorption and slow electron–hole recombination (due to increasing lifetime for charge carriers), which might explain why these compounds have long diffusion lengths ,. These features are necessary for an efficient extraction of charge carriers, even with modest mobility, and for high open‐circuit currents and voltages .…”

Section: Resultsmentioning

confidence: 53%

Revealing the Chemistry between Band Gap and Binding Energy for Lead‐/Tin‐Based Trihalide Perovskite Solar Cell Semiconductors

Varadwaj

Yamashita

2018

ChemSusChem

View full text Add to dashboard Cite

A relationship between reported experimental band gaps (solid) and DFT-calculated binding energies (gas) is established, for the first time, for each of the four ten-membered lead (or tin) trihalide perovskite solar cell semiconductor series examined in this study, including CH NH PbY , CsPbY , CH NH SnY and CsSnY (Y=I Br , I Cl , Br Cl , and IBrCl). The relationship unequivocally provides a new dimension for the fundamental understanding of the optoelectronic features of solid-state solar cell thin films by using the 0 K gas-phase energetics of the corresponding molecular building blocks.

show abstract

Section: Resultsmentioning

confidence: 53%

Revealing the Chemistry between Band Gap and Binding Energy for Lead‐/Tin‐Based Trihalide Perovskite Solar Cell Semiconductors

Varadwaj

Yamashita

2018

ChemSusChem

View full text Add to dashboard Cite

show abstract

“…The organometal halide perovskite solar cell (OHPSC) holds many advantages over other types of solar cells, such as high absorption coefficient in visible light, low binding energy of its excitons, long diffusion length of carriers, tunable bandgap from various composition, and solution processing. Researchers are continuously working to improve the power conversion efficiency (PCE) of OHPSCs since it first debuted in 2009 .…”

Section: Introductionmentioning

confidence: 99%

Acetamidinium Cation to Confer Ion Immobilization and Structure Stabilization of Organometal Halide Perovskite Toward Long Life and High‐Efficiency p‐i‐n Planar Solar Cell via Air‐Processable Method

et al. 2020

View full text Add to dashboard Cite

Ion migration in organometal halide perovskite solar cell (OHPSC) and crystal structure evolution of organometal halide perovskites (OHPVSKs) in air are considered as one of the critical factors for unstable performance and of the urgent issues for the reliability of OHPSCs. Herein, a novel cation of acetamidinium (Aa+) with stronger coordinated bond with I− than methylammonium is induced into OHPVSK to stabilize its crystal structure. By incorporating Aa+ ions into OHPVSKs, the power conversion efficiency (PCE) of OHPSC without an encapsulation can maintain higher than 75% of its initial PCE after a 200 h humidity (60–80% relative humidity (RH) in air) or a 24 h thermal stress test (85 °C in dry N2). The Aa–MAPbI3 device exhibits an outstanding efficiency of 20.68%, and over 80% of initial PCE is maintained after a 1300 h damp heat as encapsulated. This novel cation can be easily incorporated into OHPVSK via a hot casting process in air with a high environmental tolerance as compared with that from the conventional coating process, which suffers from sophisticated crystallization steps and a strict processing atmosphere. It extends processing windows for OHPVSK fabrication and provides a promising path toward mass production and further commercialization.

show abstract

“…49 In addition, Zhang et al reported greater diffusion lengths of up to 380 μm for HPs that were obtained by incorporating Cl − into MAPbI 3−x Cl x . 50 The incorporation of Cl − was determined to increase the density of trap states that create the medium for charge transfer and reduce the VB, which dominate carrier recombination. Consequently, the carrier diffusion lengths of MAPbI 3−x Cl x single crystals featuring the optimum Cl content (x = 0.005) reached maximum values.…”

Section: Optical Propertiesmentioning

confidence: 99%

Halide perovskite photocatalysis: progress and perspectives

Huynh

Nguyen

et al. 2020

J of Chemical Tech & Biotech

View full text Add to dashboard Cite

Organic–inorganic metal halide perovskites (HPs) have emerged as new frontier materials for optoelectronic and energy applications. In addition to various well‐known applications, such as solar cells, light‐emitting diodes, photodetectors, and resistive switching memories, HPs can be utilized as efficient photocatalysts for numerous electrochemical reactions, including carbon dioxide (CO2) reduction reactions, hydrogen evolution reaction, photosynthesis, and wastewater treatment. However, the use of HPs toward photo‐driven catalysis remains a tremendous challenge owing to their poor stability in polar solvents. Nevertheless, huge progress has been made to counter this critical issue for improving the performance of HPs as efficient photocatalysts in a wide range of applications. In this review, we first introduce the structures and properties of HPs. Next, we highlight the recent approaches on the fabrication of HPs, including thin films and nanostructures. Strategies for implementing HPs in catalysis systems and their working mechanisms are thoroughly summarized and discussed. Lastly, the current challenges and prospects of the application of HPs toward photocatalytic reactions are fully addressed. © 2020 Society of Chemical Industry

show abstract

Extra long electron–hole diffusion lengths in CH₃NH₃PbI_3−xCl_x perovskite single crystals

Abstract: Both trap-state densities and energy levels affect carrier transfer, resulting in a maximum diffusion length of 380 μm in CH3NH3PbI3−xClx (x = 0.005).

Cited by 94 publications

References 32 publications

Revealing the Chemistry between Band Gap and Binding Energy for Lead‐/Tin‐Based Trihalide Perovskite Solar Cell Semiconductors

Revealing the Chemistry between Band Gap and Binding Energy for Lead‐/Tin‐Based Trihalide Perovskite Solar Cell Semiconductors

Acetamidinium Cation to Confer Ion Immobilization and Structure Stabilization of Organometal Halide Perovskite Toward Long Life and High‐Efficiency p‐i‐n Planar Solar Cell via Air‐Processable Method

Halide perovskite photocatalysis: progress and perspectives

Contact Info

Product

Resources

About