Cesium lead bromide semiconductor radiation detectors: crystal growth, detector performance and polarization

Toufanian, Reyhaneh; Swain, Santosh; Becla, Piotr; Motakef, Shariar; Datta, Amlan

doi:10.1039/d2tc01679f

Title: Cesium lead bromide semiconductor radiation detectors: crystal growth, detector performance and polarization

Journal Article · Thu Aug 11 00:00:00 EDT 2022 · Journal of Materials Chemistry C

DOI:https://doi.org/10.1039/d2tc01679f· OSTI ID:1883226

Toufanian, Reyhaneh ^[1]; Swain, Santosh ^[1]; Becla, Piotr ^[1]; Motakef, Shariar ^[1];

^[1]

CapeSym Inc., Natick, MA (United States)

Cesium lead bromide (CsPbBr₃) is an upcoming semiconductor radiation detector that has the potential to match the detection properties of cadmium zinc telluride (CZT) and thallium bromide (TlBr). In this paper, we report on CsPbBr₃ gamma detectors with an uncorrected energy resolution of 2% at 662 keV with photopeak-to-Compton ratios as high as 14.3 and hole mobility-lifetime products (μτ_h) as high as 1.7 × 10^–2 cm² V^–1. Furthermore, we demonstrate that the processes employed for material purification and crystal growth of high-performing devices are scalable, and large (up to 65 mm in diameter) ultrahigh purity CsPbBr₃ crystals have been successfully grown. Furthermore by using optimized growth conditions and detector fabrication processes, we were able to mitigate the polarization problem where it was revealed that the polarization process is highly dependent on the crystal quality and the electric field direction with respect to the orientation of the crystal.

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Research Organization:: CapeSym Inc., Natick, MA (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: SC0020900

OSTI ID:: 1883226

Alternate ID(s):: OSTI ID: 1882430

Journal Information:: Journal of Materials Chemistry C, Vol. 10, Issue 35; ISSN 2050-7526

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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