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, John A. Peters, Constantinos C. Stoumpos, Maria Sebastian, Bruce W. Wessels, Jino Im, Arthur J. Freeman, 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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