Lead halide perovskites have attracted increasing attention in photovoltaic devices,light-emitting diodes,photodetectors,and other fields due to their excellent properties.Besides optoelectronic devices,growing number...Lead halide perovskites have attracted increasing attention in photovoltaic devices,light-emitting diodes,photodetectors,and other fields due to their excellent properties.Besides optoelectronic devices,growing numbers of studies have focused on the perovskite-based electrical devices in the past few years,such as transistors and resistive random access memories(RRAMs).Here,this article summarizes the recent progress the researchers have made of RRAM devices.Primarily,the working mechanism and the key parameters of RRAM are introduced.Generally,the working principles,including the conductive filament model(containing the types of the model of the metal cationsinduced filament and the model of the ions migration in bulk),the interface effect,and the electronic effect are the origins of the RRAM behaviors,and hence,various factors that affect the device performance are explored.Then,RRAMs based on organolead halide perovskite and all-inorganic perovskite are discussed in terms of different structures,different compositions,and different fabrication methods.Finally,a brief conclusion and a broad outlook are given on the progress and challenges in the field of perovskite-based RRAMs.展开更多
Understanding the correlation between the life- time, mobility and diffusion length of photoinduced charge carriers in organolead halide perovskite is essential to suc- cessful perovskite-based solar cells. In this pa...Understanding the correlation between the life- time, mobility and diffusion length of photoinduced charge carriers in organolead halide perovskite is essential to suc- cessful perovskite-based solar cells. In this paper, through mapping the local photoluminescence （PL） dynamics using laser/PL-scanned confocal imaging microscopy and simu- lating the carrier diffusion process in an individual CH3NH3PbI3 single-crystalline particle, we report that the rapid diffusion of charge carriers can produce a fast local PL kinetics when the perovskite is partially excited. This result indicates that using PL kinetics to estimate the carrier life- time in perovskite single crystals needs to exclude the effect of carrier diffusion.展开更多
基金National Natural Science Foundation of China(61704131)National Key Research and Development Program of China(grant 2018YFB2202900)+1 种基金Key Research and Development Program of Shaanxi Province(grant 2020GY-310)Fundamental Research Funds for the Central Universities.
文摘Lead halide perovskites have attracted increasing attention in photovoltaic devices,light-emitting diodes,photodetectors,and other fields due to their excellent properties.Besides optoelectronic devices,growing numbers of studies have focused on the perovskite-based electrical devices in the past few years,such as transistors and resistive random access memories(RRAMs).Here,this article summarizes the recent progress the researchers have made of RRAM devices.Primarily,the working mechanism and the key parameters of RRAM are introduced.Generally,the working principles,including the conductive filament model(containing the types of the model of the metal cationsinduced filament and the model of the ions migration in bulk),the interface effect,and the electronic effect are the origins of the RRAM behaviors,and hence,various factors that affect the device performance are explored.Then,RRAMs based on organolead halide perovskite and all-inorganic perovskite are discussed in terms of different structures,different compositions,and different fabrication methods.Finally,a brief conclusion and a broad outlook are given on the progress and challenges in the field of perovskite-based RRAMs.
基金supported by the State Key Laboratory of Molecular Reaction Dynamics at Dalian Institute of Chemical Physics of Chinese Academy of Sciencesthe National Natural Science Foundation of China(21473192)the National Basic Research Program of China(2013CB834604)
文摘Understanding the correlation between the life- time, mobility and diffusion length of photoinduced charge carriers in organolead halide perovskite is essential to suc- cessful perovskite-based solar cells. In this paper, through mapping the local photoluminescence （PL） dynamics using laser/PL-scanned confocal imaging microscopy and simu- lating the carrier diffusion process in an individual CH3NH3PbI3 single-crystalline particle, we report that the rapid diffusion of charge carriers can produce a fast local PL kinetics when the perovskite is partially excited. This result indicates that using PL kinetics to estimate the carrier life- time in perovskite single crystals needs to exclude the effect of carrier diffusion.
