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• W3103173274 abstract "Abstract Current technologies for X-ray detection rely on scintillation from expensive inorganic crystals grown at high-temperature, which so far has hindered the development of large-area scintillator arrays. Thanks to the presence of heavy atoms, solution-grown hybrid lead halide perovskite single crystals exhibit short X-ray absorption length and excellent detection efficiency. Here we compare X-ray scintillator characteristics of three-dimensional (3D) MAPbI 3 and MAPbBr 3 and two-dimensional (2D) (EDBE)PbCl 4 hybrid perovskite crystals. X-ray excited thermoluminescence measurements indicate the absence of deep traps and a very small density of shallow trap states, which lessens after-glow effects. All perovskite single crystals exhibit high X-ray excited luminescence yields of >120,000 photons/MeV at low temperature. Although thermal quenching is significant at room temperature, the large exciton binding energy of 2D (EDBE)PbCl 4 significantly reduces thermal effects compared to 3D perovskites, and moderate light yield of 9,000 photons/MeV can be achieved even at room temperature. This highlights the potential of 2D metal halide perovskites for large-area and low-cost scintillator devices for medical, security and scientific applications." @default.
• W3103173274 created "2020-11-23" @default.
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• W3103173274 date "2016-11-16" @default.
• W3103173274 modified "2023-10-12" @default.
• W3103173274 title "X-ray Scintillation in Lead Halide Perovskite Crystals" @default.
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• W3103173274 doi "https://doi.org/10.1038/srep37254" @default.
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