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 ...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.展开更多
基金supported by the UK Department for Business,Energy and Industrial Strategy(BEIS)through the National Measurement Systemsupported by the DOE,Office of Science and Office of Basic Energy Sciences+9 种基金EPSRC New Investigator Award(2018EP/R043272/1)for financial supportsupported by the US Office of Naval Research under contract N00014-17-1-2241MSCA-IF-2018 Individual Fellowships(839136)the China postdoctoral science foundation(2018M633128)Shenzhen Basic Research Project(JCYJ20170818142926085)for financial supportsupported 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).
文摘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.
