CsPbBr3 perovskite detectors with 1.4% energy resolution for high-energy γ-rays

Yihui He, Matthew Petryk, Zhifu Liu, Daniel G. Chica, Ido Hadar, Charles Leak, Weijun Ke, Ioannis Spanopoulos, Wenwen Lin, Duck Young Chung, Bruce W. Wessels, Zhong He, Mercouri G. Kanatzidis*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

200 Scopus citations

Abstract

Halide perovskite semiconductors are poised to revitalize the field of ionizing radiation detection as they have done to solar photovoltaics. We show that all-inorganic perovskite CsPbBr3 devices resolve 137Cs 662-keV γ-rays with 1.4% energy resolution, as well as other X- and γ-rays with energies ranging from tens of keV to over 1 MeV in ambipolar sensing and unipolar hole-only sensing modes with crystal volumes of 6.65 mm3 and 297 mm3, respectively. We report the scale-up of CsPbBr3 ingots to up to 1.5 inches in diameter with an excellent hole mobility–lifetime product of 8 × 10−3 cm2 V−1 and a long hole lifetime of up to 296 μs. CsPbBr3 detectors demonstrate a wide temperature region from ~2 °C to ~70 °C for stable operation. Detectors protected with suitable encapsulants show a uniform response for over 18 months. Consequently, we identify perovskite CsPbBr3 semiconductor as an exceptional candidate for new-generation high-energy γ-ray detection.

Original languageAmerican English
Pages (from-to)36-42
Number of pages7
JournalNature Photonics
Volume15
Issue number1
DOIs
StatePublished - Jan 2021
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2020, The Author(s), under exclusive licence to Springer Nature Limited.

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