Heavy metal ternary halides for room-temperature x-ray and gamma-ray detection

Zhifu Liu; John A. Peters; Constantinos C. Stoumpos; Maria Sebastian; Bruce W. Wessels; Jino Im; Arthur J. Freeman; Mercouri G. Kanatzidis

doi:10.1117/12.2022877

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26 September 2013 Heavy metal ternary halides for room-temperature x-ray and gamma-ray detection

Zhifu Liu, John A. Peters, Constantinos C. Stoumpos, Maria Sebastian, Bruce W. Wessels, Jino Im, Arthur J. Freeman, Mercouri G. Kanatzidis

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Proceedings Volume 8852, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV; 88520A (2013) https://doi.org/10.1117/12.2022877
Event: SPIE Optical Engineering + Applications, 2013, San Diego, California, United States

Abstract

We report our recent progress on wide bandgap ternary halide compounds CsPbBr₃ and CsPbCl₃ for room temperature x-ray and gamma-ray detectors. Their bandgaps are measured to be 2.24 eV and 2.86 eV, respectively. The measured mobility-lifetime products of CsPbBr₃ are 1.7×10^-3,1.3×10^-3 cm2/V, for electron and hole carriers, respectively, comparable to those of CdTe. We measured the room temperature spectral response of CsPbBr₃ sample to Ag x-ray radiation. It has a well-resolved spectral response to the 22.4 keV K_α radiation peak and detector efficiency comparable to that of CdZnTe detector at 295 K.

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Zhifu Liu, John A. Peters, Constantinos C. Stoumpos, Maria Sebastian, Bruce W. Wessels, Jino Im, Arthur J. Freeman, and Mercouri G. Kanatzidis "Heavy metal ternary halides for room-temperature x-ray and gamma-ray detection", Proc. SPIE 8852, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics XV, 88520A (26 September 2013); https://doi.org/10.1117/12.2022877

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