首页|Exploring centimeter-sized crystals of bismuth-iodide perovskite toward highly sensitive X-ray detection

Exploring centimeter-sized crystals of bismuth-iodide perovskite toward highly sensitive X-ray detection

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Lead-halide perovskites exhibit outstanding performance in X-ray detection due to their intrinsic fea-tures such as high charge carrier mobility,large atomic number,and long carrier lifetime,but the tox-icity of lead is regarded as the major factor hindering their development.Here,we introduce organic molecule(R)-(-)-2-methylpiperazine(R-MPz)into the bismuth-based structure to synthesize lead-free(R)-(H2MPz)Bil5(R-MBI).The high-quality centimeter-sized single crystals have been obtained,which show a low dark current and superior environmental stability.Particularly,the single-crystal device of R-MBI exhibits a high μτ product up to 1.88 × 10-4 cm2/V and a low trap density of 1.21 × 1010 cm-3.Further,the detector displays excellent detection sensitivity of 263.58 μC Gyair-1 cm-2 and a favorable low detection limit of 4.35 μGyair/s,both of which meet the requirement for medical diagnostics.These find-ings shed light on the exploration of innovative bismuth-based hybrid perovskites for high-performance X-ray detection.

PerovskiteLead-freeBismuth-basedX-ray detectionSensitivity

Xin Dong、Jing Liang、Zhijin Xu、Huajie Wu、Lei Wang、Shihai You、Junhua Luo、Lina Li

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College of Chemistry,Fuzhou University,Fuzhou 350116,China

State Key Laboratory of Structure Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China

University of Chinese Academy of Sciences,Beijing 100049,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaKey Research Program of Frontier Sciences of the Chinese Academy of SciencesNational Postdoctoral Program for Innovative TalentsNational Key Research and Development Program of China

22175177219712382219304221833010221251102212250721921001U21A2069ZDBS-LY-SLH024BX20213152019YFA0210402

2024

10.1016/j.cclet.2023.108708

中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCD
影响因子：0.771
ISSN：1001-8417
年,卷(期)：2024.35(6)
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