Inorganic A-site cations improve the performance of band-edge carriers in lead halide perovskites
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Published:2023-09-25
Issue:1
Volume:16
Page:
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ISSN:2095-2767
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Container-title:Frontiers of Optoelectronics
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language:en
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Short-container-title:Front. Optoelectron.
Author:
Wang Cheng,Rong Yaoguang,Wang Ti
Abstract
AbstractIn lead halide perovskites, organic A-site cations are generally introduced to fine-tune the properties. One of the questions under debate is whether organic A-site cations are essential for high-performance solar cells. In this study, we compare the band edge carrier dynamics and diffusion process in MAPbBr3 and CsPbBr3 single-crystal microplates. By transient absorption microscopy, the band-edge carrier diffusion constants are unraveled. With the replacement of inorganic A-site cations, the diffusion constant in CsPbBr3 increases almost 8 times compared to that in MAPbBr3. This work reveals that introducing inorganic A-site cations can lead to a much larger diffusion length and improve the performance of band-edge carriers.
Graphical Abstract
Publisher
Springer Science and Business Media LLC
Subject
Electrical and Electronic Engineering,Electronic, Optical and Magnetic Materials
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