26 September 2013 Heavy metal ternary halides for room-temperature x-ray and gamma-ray detection
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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 Kα radiation peak and detector efficiency comparable to that of CdZnTe detector at 295 K.
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Zhifu Liu, Zhifu Liu, John A. Peters, John A. Peters, Constantinos C. Stoumpos, Constantinos C. Stoumpos, Maria Sebastian, Maria Sebastian, Bruce W. Wessels, Bruce W. Wessels, Jino Im, Jino Im, Arthur J. Freeman, Arthur J. Freeman, Mercouri G. Kanatzidis, 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); doi: 10.1117/12.2022877; https://doi.org/10.1117/12.2022877


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