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The availability of wide-band-gap oxides with bipolar conductivity is critical to developing transparent optoelectronic technologies. Unfortunately, most metal oxides show a strong propensity for $n$-type conductivity, while $p$-type doping remains… Click to show full abstract
The availability of wide-band-gap oxides with bipolar conductivity is critical to developing transparent optoelectronic technologies. Unfortunately, most metal oxides show a strong propensity for $n$-type conductivity, while $p$-type doping remains extremely challenging. Focusing on CdO and NiO, which have type-III band offset, this study reveals that their alloy Ni${}_{x}$Cd${}_{1\ensuremath{-}x}$O${}_{1+\ensuremath{\delta}}$ can exhibit bipolar conductivity. Electronic band structure and native defects are manipulated by varying the oxygen stoichiometry. The results strongly suggest that these alloys have great technological potential for applications requiring transparent conducting oxides.
Journal Title: Physical Review Applied
Year Published: 2019
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