Laser-Induced Recoverable Fluorescence Quenching of Perovskite Films at a Microscopic Grain Scale  

作　　者：Yuren Xiang Yameng Cao Wenqiang Yang Rui Hu Sebastian Wood Bowei Li Qin Hu Fan Zhang Jujie He Mozhgan Yavari Jinlai Zhao Yunlong Zhao Jun Song Junle Qu Rui Zhu Thomas P.Russell S.Ravi P.Silva Wei Zhang 

机构地区：[1]Center for Biomedical Optics and Photonics(CBOP)&College of Physics and Optoelectronic Engineering,Key Laboratory of Optoelectronic Devices and Systems,Shenzhen University,Shenzhen 518060,China [2]Advanced Technology Institute,University of Surrey,Guildford GU27XH,UK [3]National Physical Laboratory,Hampton Road,Teddington TW110LW,UK [4]Department of Polymer Science and Engineering,University of Massachusetts,Amherst MA 01003,USA [5]State Key Laboratory for Artificial Microstructure and Mesoscopic Physics,School of Physics,Peking University,Beijing 100871,China [6]College ofmaterials science and engineering,Shenzhen Key laboratory of Polymer Science and Technology,Guangdong Research Center for interfacial Engineering of FunctionalMaterials,Shenzhen University,Shenzhen 518060,China

出　　处：《Energy & Environmental Materials》2022年第4期1189-1199,共11页能源与环境材料（英文）

基　　金：supported by the UK Department for Business,Energy and Industrial Strategy(BEIS)through the National Measurement System;supported by the DOE,Office of Science and Office of Basic Energy Sciences;EPSRC New Investigator Award(2018;EP/R043272/1)for financial support;supported by the US Office of Naval Research under contract N00014-17-1-2241;MSCA-IF-2018 Individual Fellowships(839136);the China postdoctoral science foundation(2018M633128);Shenzhen Basic Research Project(JCYJ20170818142926085)for financial support;supported by the National Basic Research Program of China(2015CB352005);the National Natural Science Foundation of China(61775145,61605124,31771584,61525503,61620106016,81727804,61605130,51602201);Guangdong Natural Science Foundation Innovation Team(2014A030312008);Shenzhen Basic Research Project(JCYJ20170412110212234,JCYJ20160308093035903,JCYJ20150930104948169,JCYJ20160328144746940,GJHZ20160226202139185).

摘　　要：Understanding the fundamental properties of metal-halide perovskite materials is driving the development of novel optoelectronic applications.Here,we report the observation of a recoverable laser-induced fluorescence quenching phenomenon in perovskite films with a microscopic grain-scale restriction,accompanied by spectral variations.This fluorescence quenching depends on the laser intensity and the dwell time under Auger recombination dominated conditions.These features indicate that the perovskite lattice deformation may take the main responsibility for the transient and show a new aspect to understand halide perovskite photostability.We further modulate this phenomenon by adjusting the charge carrier recombination and extraction,revealing that efficient carrier transfer can improve the bleaching resistance of perovskite grains.Our results provide future opportunities to attain high-performance devices by tuning the perovskite lattice disorder and harvesting the energetic carriers.

关 键 词：fluorescence quenching PEROVSKITE PHOTOPHYSICS stability 

分 类 号：TB383.2[一般工业技术—材料科学与工程]