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- W2080562747 abstract "Samples of n-type CdGeAs2 were produced by intentional doping with indium, selenium, or tellurium impurities. A near-edge photoluminescence (PL) band from heavily In-doped CdGeAs2 samples shifts to higher energy and becomes broader with increasing electron concentration. The observed shifts in peak energies are compared to predictions for donor–acceptor pair and free-to-bound (electron–acceptor) recombinations including band filling, band tailing, and band gap shrinkage effects due to the high doping levels. For n>2 × 1018 cm−3, the free-to-bound PL transition related to a shallow 120 meV acceptor level is dominant. A lower energy PL band due to deep acceptors and normally seen for p-type samples is the only emission observed from less n-type samples (n∼1016–1017 cm−3) doped with indium, selenium, or tellurium impurities. Transitions involving the deep acceptor level are not present in the PL for heavily In-doped CdGeAs2 crystals, which suggests that the deep acceptor may be a Cd vacancy." @default.
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- W2080562747 date "2005-09-02" @default.
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- W2080562747 title "Photoluminescence of n-type CdGeAs<sub>2</sub>" @default.
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- W2080562747 doi "https://doi.org/10.1088/0953-8984/17/37/007" @default.
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