Strong electron-ion coupling in gradient halide perovskite heterojunction

• 作者: Hongye Chen Liaoyu Wang Chun Shen Jiahuan Zhang Wanlin Guo
• 来源期刊: 纳米研究（英文版）
• 年，卷（期）: 2021,（4）
• 所属期刊栏目: Research Articles
• 页码范围: 1012-1017
• 页数: 6页
• 语种: 英文

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/--Vcurves 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.