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- W2783282770 abstract "Cu2I2Se6 is a new wide-bandgap semiconductor with high stability and great potential toward hard radiation and photon detection. Cu2I2Se6 crystallizes in the rhombohedral R3̅m space group with a density of d = 5.287 g·cm-3 and a wide bandgap Eg of 1.95 eV. First-principles electronic band structure calculations at the density functional theory level indicate an indirect bandgap and a low electron effective mass me* of 0.32. The congruently melting compound was grown in centimeter-size Cu2I2Se6 single crystals using a vertical Bridgman method. A high electric resistivity of ∼1012 Ω·cm is readily achieved, and detectors made of Cu2I2Se6 single crystals demonstrate high photosensitivity to Ag Kα X-rays (22.4 keV) and show spectroscopic performance with energy resolutions under 241Am α-particles (5.5 MeV) radiation. The electron mobility is measured by a time-of-flight technique to be ∼46 cm2·V-1·s-1. This value is comparable to that of one of the leading γ-ray detector materials, TlBr, and is a factor of 30 higher than mobility values obtained for amorphous Se for X-ray detection." @default.
- W2783282770 created "2018-01-26" @default.
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- W2783282770 date "2018-01-30" @default.
- W2783282770 modified "2023-10-12" @default.
- W2783282770 title "Cu<sub>2</sub>I<sub>2</sub>Se<sub>6</sub>: A Metal–Inorganic Framework Wide-Bandgap Semiconductor for Photon Detection at Room Temperature" @default.
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- W2783282770 doi "https://doi.org/10.1021/jacs.7b12549" @default.
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