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Issue 4, 2020
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Bismuth halide perovskite derivatives for direct X-ray detection

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Abstract

Metal halide hybrid perovskites containing high atomic number (Z) elements have a large absorption cross-section for high-energy X-rays, and emerge as excellent semiconductors for direct X-ray detection. Here we report a new bismuth-based perovskite derivative (DMEDA)BiI5 (DMEDA2+: CH3NH3CH2CH2NH3CH32+) with one-dimensional crystal structure for X-ray detection. Thermogravimetric analysis shows that (DMEDA)BiI5 can withstand thermal treatment up to 287 °C. (DMEDA)BiI5 has a direct band gap of 1.82 eV, and a comparable X-ray attenuation coefficient to Cs2AgBiBr6 and MAPbI3. The fabricated photoconductive X-ray detector shows a stable baseline, which indicates that (DMEDA)BiI5 has a negligible ionic migration effect. The detection sensitivity toward X-ray radiation reaches 72.5 μC Gyair−1 cm−2.

Graphical abstract: Bismuth halide perovskite derivatives for direct X-ray detection

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Supplementary files

Article information


Submitted
18 Nov 2019
Accepted
17 Dec 2019
First published
19 Dec 2019

J. Mater. Chem. C, 2020,8, 1239-1243
Article type
Communication

Bismuth halide perovskite derivatives for direct X-ray detection

L. Yao, G. Niu, L. Yin, X. Du, Y. Lin, X. Den, J. Zhang and J. Tang, J. Mater. Chem. C, 2020, 8, 1239
DOI: 10.1039/C9TC06313G

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