材料科学
电离辐射
光电子学
辐照
辐射
带隙
粒子探测器
光学
物理
核物理学
作者
Shihai You,Panpan Yu,Tingting Zhu,Cunjian Lin,Jianbo Wu,Zeng‐Kui Zhu,Chengshu Zhang,Li Zhou,Chengmin Ji,Junhua Luo
标识
DOI:10.1002/adfm.202310916
摘要
Abstract The anomalous photovoltaic (APV) effect in organic–inorganic hybrid perovskites (OIHPs) has attracted massive interest for developing high‐performance optoelectronic devices. However, exploring the ionizing radiation responsive APV effect remains blank, let alone its potential applications. Herein, the unprecedented APV behavior in a 1D lead‐free OIHP, (4‐AMP)BiI 5 ( ABI , 4‐AMP = 4‐(aminomethyl)pyridine) under X‐ray irradiation is reported, exhibiting a large above‐bandgap bulk photovoltage of ≈10 V. Such a strong APV effect is closely related to the intrinsic electric polarization in polar ABI , which acts as the driving force for X‐ray‐generated carriers’ separation and transport, thus allowing it to be self‐powered. As a result, sensitive self‐powered X‐ray detectors based on high‐quality ABI single crystals are successfully fabricated, possessing a high sensitivity of 66.84 µC Gy −1 cm −2 , a low detection limit of 482 nGy s −1 , and superior operational stability. This work first demonstrates the ionizing radiation‐responsive APV effect in OIHPs, which further enables passive radiation detection.
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