Inorganic A‑site cations improve the performance of band‑edge carriers in lead halide perovskites

作     者：Cheng Wang Yaoguang Rong Ti Wang Cheng Wang;Yaoguang Rong;Ti Wang

作者机构：Key Laboratory of Artifcial Micro-and Nano-Structures of Ministry of EducationSchool of Physics and TechnologyWuhan UniversityWuhan 430072China Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and TechnologyWuhan 430074China 

出 版 物：《Frontiers of Optoelectronics》 (光电子前沿（英文版）)

年 卷 期：2023年第16卷第3期

页      面：115-121页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：the Ministry of Science and Technology of China(No.2019YFE0120300) the Open Project Program of Wuhan National Laboratory for Optoelectronics(No.2020WNLOKF014) 

主　　题：Perovskite Inorganic cations Carrier difusion 

摘      要：In lead halide perovskites,organic A-site cations are generally introduced to fne-tune the *** of the questions under debate is whether organic A-site cations are essential for high-performance solar *** this study,we compare the band edge carrier dynamics and difusion process in MAPbBr_(3)and CsPbBr_(3)single-crystal *** transient absorption microscopy,the band-edge carrier difusion constants are *** the replacement of inorganic A-site cations,the difusion constant in CsPbBr_(3)increases almost 8 times compared to that in MAPbBr_(3).This work reveals that introducing inorganic A-site cations can lead to a much larger difusion length and improve the performance of band-edge carriers.