Tailoring the electron and hole dimensionality to achieve efficient and stable metal halide perovskite scintillators

Nanophotonics

article

Zhifang Tan¹  Zhigang Li²  Hongtao Zhao²  Xinyuan Du¹  Jiang Tang¹  Jincong Pang¹  Guangda Niu¹  Jun-Hui Yuan⁴  Kan-Hao Xue⁴  Xiangshui Miao⁴  Weijian Tao⁵  Haiming Zhu⁵ 

[1] Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology;Technical Physics Institute, Heilongjiang Academy of Sciences;College of Nuclear Science and Technology, Harbin Engineering University;School of Optical and Electronic Information, Huazhong University of Science and Technology;Department of Chemistry, Zhejiang University

关键词: electron and hole dimensionality;    metal halide perovskite;    scintillators;    stable;    tailoring;   

DOI  :  10.1515/nanoph-2020-0624

学科分类：社会科学、人文和艺术（综合）

来源: De Gruyter

【 摘 要 】

Metal halide perovskites have recently been reported as excellent scintillators for X-ray detection. However, perovskite based scintillators are susceptible to moisture and oxygen atmosphere, such as the water solubility of CsPbBr 3 , and oxidation vulnerability of Sn 2+ , Cu + . The traditional metal halide scintillators (NaI: Tl, LaBr 3 , etc.) are also severely restricted by their high hygroscopicity. Here we report a new kind of lead free perovskite with excellent water and radiation stability, Rb 2 Sn 1- x Te x Cl 6 . The equivalent doping of Te could break the in-phase bonding interaction between neighboring octahedra in Rb 2 SnCl 6 , and thus decrease the electron and hole dimensionality. The optimized Te content of 5% resulted in high photoluminescence quantum yield of 92.4%, and low X-ray detection limit of 0.7 µGy air s −1 . The photoluminescence and radioluminescence could be maintained without any loss when immersing in water or after 480,000 Gy radiations, outperforming previous perovskite and traditional metal halides scintillators.

【 授权许可】

CC BY