摘要
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.
基金
by the National Key Research and Development Program of China(No.2019YFA0705400)
the Nationd Natural Science Foundation of China(No.51535005)
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).
