A computational study finds that an oxygen interstitial next to a substitutional cobalt atom is the likely origin of the 1.88 to 2.02 eV luminescence in Co-doped ZnO, while other neutral defects are ruled out.
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GW electronic structure calculations of Co doped ZnO
A computational study finds that an oxygen interstitial next to a substitutional cobalt atom is the likely origin of the 1.88 to 2.02 eV luminescence in Co-doped ZnO, while other neutral defects are ruled out.