The electron-ion coupling in iontronics has great significance and potential for energy conversion and storage devices.However,it is a substantial challenge to integrate iontronics into all-solid-state semiconductor c...The electron-ion coupling in iontronics has great significance and potential for energy conversion and storage devices.However,it is a substantial challenge to integrate iontronics into all-solid-state semiconductor circuits and explore the electron-ion coupling in semiconductor devices.Here,by utilizing the organic-inorganic halide perovskite,we fabricate a planar heterojunction with a gradient distribution of halide anions.The diode-like halide migration was investigated by bias voltage induced asymmetric blue shift in photoluminescence spectrum.This pseudo-ionic diode behaviour was found to result from asymmetric charge injection characterized by I-V curves and gradient-halides-induced vacancy hopping indicated by energy dispersive spectroscopy(EDS).The planar gradient perovskite heterojunction provides a viable route for extending iontronic devices into the regime of all-solid-state semiconductors.展开更多
基金by the National Key Research and Development Program of China(No.2019YFA0705400)the Nationd Natural Science Foundation of China(No.51535005)+2 种基金the Research Fund of State Key Laboratory of Mechanics and Control of Mechanical Structures(Nos.MCMS-I-0418K01,MCMS-I-0419K01)the Fundam ental Research Funds for the Central Universities(Nos.NZ2020001,NC2018001,NP2019301,NJ2019002)A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions and Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX17_0228).
文摘The electron-ion coupling in iontronics has great significance and potential for energy conversion and storage devices.However,it is a substantial challenge to integrate iontronics into all-solid-state semiconductor circuits and explore the electron-ion coupling in semiconductor devices.Here,by utilizing the organic-inorganic halide perovskite,we fabricate a planar heterojunction with a gradient distribution of halide anions.The diode-like halide migration was investigated by bias voltage induced asymmetric blue shift in photoluminescence spectrum.This pseudo-ionic diode behaviour was found to result from asymmetric charge injection characterized by I-V curves and gradient-halides-induced vacancy hopping indicated by energy dispersive spectroscopy(EDS).The planar gradient perovskite heterojunction provides a viable route for extending iontronic devices into the regime of all-solid-state semiconductors.
