The last decade has witnessed great progress in photovoltaic technology based on organometal halide perovskites because of their low nonradiative recombination loss,long carrier lifetime,and long diffusion length.The ...The last decade has witnessed great progress in photovoltaic technology based on organometal halide perovskites because of their low nonradiative recombination loss,long carrier lifetime,and long diffusion length.The excellent optical properties and easy preparation of organometal halide perovskite-based photovoltaic products enable their wide applications in electro-optical and opto-electrical conversions.In this review,photoinduced free carriers,exciton recombination,and diffusion properties of perovskite photoelectronic devices are discussed.By controlling grain sizes and grain boundaries,suppressing defects,and conducting interfacial charge transfer,their dynamics can be controlled in a versatile manner.The generality and differences in"effective carriers"for device applications,including their electro-optical and opto-electrical conversions,are discussed.In all-optical devices,a strong light-matter interaction causes nonlinear effects,such as two-photon absorption,self-phase modulation,and optical blenching,which enable high-resolution imaging,optical modulation,and optical switching.This review provides a basis for constructing high-performance photoelectronic devices.展开更多
基金supported by the National Natural Science Foundation of China(51702219,61975134,61875138,11772207,61961136001)the Science and Technology Innovation Commission of Shenzhen(KQJSCX20180328095501798,JCYJ20180507182047316,JCYJ20170811093453105,JCYJ20180307164612205,GJHZ20180928160209731)+2 种基金the Natural Science Foundation of Hebei Province for distinguished young scholars(A2019210204)Guangdong Basic and Applied Basic Research Foundation(2020A1515110538)China Postdoctoral Science Foundation(2021M692179)。
文摘The last decade has witnessed great progress in photovoltaic technology based on organometal halide perovskites because of their low nonradiative recombination loss,long carrier lifetime,and long diffusion length.The excellent optical properties and easy preparation of organometal halide perovskite-based photovoltaic products enable their wide applications in electro-optical and opto-electrical conversions.In this review,photoinduced free carriers,exciton recombination,and diffusion properties of perovskite photoelectronic devices are discussed.By controlling grain sizes and grain boundaries,suppressing defects,and conducting interfacial charge transfer,their dynamics can be controlled in a versatile manner.The generality and differences in"effective carriers"for device applications,including their electro-optical and opto-electrical conversions,are discussed.In all-optical devices,a strong light-matter interaction causes nonlinear effects,such as two-photon absorption,self-phase modulation,and optical blenching,which enable high-resolution imaging,optical modulation,and optical switching.This review provides a basis for constructing high-performance photoelectronic devices.
