DataVXACS Energy LettersPaper
journal article·2023-11-10

Promoting Band Splitting through Symmetry Breaking in Inorganic Halide Perovskite Single Crystals for High-Sensitivity X-ray Detection

Ruixin Shi, Jiacheng Pi, Depeng Chu, Binxia Jia, Zeqin Zhao, Jinglu Hao, Xiaojie Zhang, Xiaofeng Dong, Yuqian Liang, Yunxia Zhang, Yucheng Liu, Shengzhong Liu

ACS Energy Letters· Volume 8· Issue 11
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Source abstract

Abstract

We propose a band-splitting strategy driven by breaking the crystal structure symmetry by partially replacing Br – ions with larger I – ions in the CsPbBr 3 single crystal (SC). Experimental results show that the photoelectric properties of the band-split SCs are significantly improved due to the asymmetric crystal structure and distinct band splitting, which inhibits ion migration and promotes transport of carriers, respectively. It is found that the band-split SCs exhibit higher resistivity, larger mobility-lifetime product, and lower ion migration than the pristine SCs. Therefore, detectors fabricated on the band-split SCs achieved a record X-ray detection sensitivity of 2.8 × 10 5 μC Gy –1 cm –2 for the inorganic perovskite, low detection limit of 18 nGy s –1, and high resolution of 12.7 lp mm –1 in imaging. In addition, the X-ray detection stability of the band-split SC detectors has also been significantly improved, and the detectors still show high sensitivity (1.2 × 10 4 μC Gy –1 cm –2 ) at temperatures of up to 100 °C.
Source: openalex_inverted_index · Quality: baseline

Research context

Electronic materials

OpenAlex topics: Perovskite Materials and Applications · Radiation Detection and Scintillator Technologies · Advanced Semiconductor Detectors and Materials

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

School of Materials Science and Engineering, Shaanxi Normal University, Xi’an 710119, People’s Republic of China

School of Science, Xi’an University of Posts & Telecommunications, Xi’an 710121, People’s Republic of China

State Key Laboratory of Catalysis, Dalian National Laboratory for Clean Energy, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, People’s Republic of China

Funding

National University Research Fund of China · National Postdoctoral Program for Innovative Talents · China Postdoctoral Science Foundation · National Natural Science Foundation of China · Higher Education Discipline Innovation Project · Key Research and Development Projects of Shaanxi Province · Fundamental Innovation Project in the School of Materials Science and Engineering · Young Talent Fund of the University Association for Science and Technology in Shaanxi

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