High-Performance and Stable Perovskite X-ray Detection and Imaging Based on a Ti Cathode

被引：10

作者：

Zhang W. ^{[1
,2
,3
]}

Wang H. ^{[1
,2
,3
]}

Chen Z. ^{[1
,4
]}

Wang P. ^{[1
,2
,3
]}

Liu X. ^{[1
,2
,3
]}

Dong H. ^{[1
,5
]}

Zhao J. ^{[1
,3
]}

Cui Y. ^{[1
,2
,3
]}

Shao Y. ^{[1
,2
,3
,6
]}

机构：

[1] Laboratory of Thin Film Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai

[2] Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing

[3] Key Laboratory of Materials for High Power Laser, Chinese Academy of Sciences, Shanghai

[4] Key Laboratory for Ultrafine Materials of Ministry of Education, Shanghai Engineering Research Center of Hierarchical Nanomaterials, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai

[5] School of Microelectronics, Shanghai University, Shanghai

[6] Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou

来源：

ACS Applied Materials and Interfaces | 2024年 / 16卷 / 10期

基金：

中国国家自然科学基金;

关键词：

electrochemical reaction; high electric field; ion migration; operating stability; perovskite radiation detectors;

D O I：

10.1021/acsami.3c18116

中图分类号：

学科分类号：

摘要：

High-energy radiation detectors with a good imaging resolution, fast response, and high sensitivity are desired to operate at a high electric field. However, strong ion migration triggered by electrochemical reactions at the interface between a high-potential electrode and an organic-inorganic hybrid perovskite limits the stability of radiation detectors under a high electric field. Herein, we demonstrate that such ion migration could be effectively suppressed in devices with a Ti cathode, even at a high electric field of 50 V mm-1, through time-of-flight secondary-ion mass spectrometry. X-ray photoelectron spectroscopy illustrates that Ti-N bonds formed at the interface of MAPbBr3 perovskite single crystals/Ti electrode effectively inhibit the electrochemical reaction in organic-inorganic hybrid perovskite devices and ultimately improve the operating stability under a high electric field. The device with a Ti electrode reaches a high sensitivity of 96 ± 1 mC Gyair-1 cm-2 and a low detection limit of 2.8 ± 0.3 nGy s-1 under hard X-ray energy. © 2024 American Chemical Society

引用

页码：12844 / 12852

页数：8

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