Development of robust perovskite single crystal radiation detectors with high spectral resolution through synergetic trap deactivation and self‐healing
Lixiang Wang,
Yilong Song,
Liqi Li,
Liting Tao,
Minxing Yan,
Weihui Bi,
Xueying Yang,
Yuan Sun,
Qingfeng Dong,
Deren Yang,
Yanjun Fang
Affiliations
Lixiang Wang
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University Hangzhou the People's Republic of China
Yilong Song
State Key Laboratory of Supramolecular Structure and Materials College of Chemistry, Jilin University Changchun the People's Republic of China
Liqi Li
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University Hangzhou the People's Republic of China
Liting Tao
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University Hangzhou the People's Republic of China
Minxing Yan
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University Hangzhou the People's Republic of China
Weihui Bi
State Key Laboratory of Supramolecular Structure and Materials College of Chemistry, Jilin University Changchun the People's Republic of China
Xueying Yang
State Key Laboratory of Supramolecular Structure and Materials College of Chemistry, Jilin University Changchun the People's Republic of China
Yuan Sun
State Key Laboratory of Supramolecular Structure and Materials College of Chemistry, Jilin University Changchun the People's Republic of China
Qingfeng Dong
State Key Laboratory of Supramolecular Structure and Materials College of Chemistry, Jilin University Changchun the People's Republic of China
Deren Yang
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University Hangzhou the People's Republic of China
Yanjun Fang
State Key Laboratory of Silicon Materials and School of Materials Science and Engineering Zhejiang University Hangzhou the People's Republic of China
Abstract Organic–inorganic halide perovskite single crystals (SCs) are promising materials for detecting ionizing radiation owing to their outstanding photoelectric conversion capability and inexpensive solution processability. However, the accuracy and stability of the detectors have been limited due to the charge traps and defects in SCs, especially when operated under high‐precision photon‐counting mode for energy spectrum acquisition. Here, we proposed a trap freezing deactivation route, which obviously suppressed dark current and noise by up to 97% and 92%, respectively. Furthermore, the bulk ion migration effect was essential for the ability to instantly self‐heal defects induced by radiation damage at temperatures down to −30°C. Consequently, the detector exhibits a record high energy resolution of 7.5% at 59.5 keV for 241Am γ‐ray source, which is the best solution‐processed semiconductor radiation detectors at the same energy range. In addition, the detector maintains over 90% of its initial performance after 9 months of storage when tested in the air. Our results will represent a revision of the paradigm that high‐spectral‐resolution and robust radiation detectors can only be realized with high temperature grown inorganic semiconductor single crystals.
