材料科学
钙钛矿(结构)
阴极
纳米技术
光电子学
工程物理
化学工程
物理化学
化学
工程类
作者
Wenqing Zhang,Hu Wang,Zhilong Chen,Pengxiang Wang,Xin Liu,Hao Dong,Jianlong Zhao,Yuying Cui,Yuchuan Shao
标识
DOI:10.1021/acsami.3c18116
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.
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