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- W2970208844 abstract "NiO-CdO alloy films over the entire composition range were synthesized by RT magnetron sputtering in both pure Ar (Ni x Cd 1-x O) and $text{Ar} +mathrm{O}2(text{Ni}_{mathrm{x}}text{Cd}_{1-mathrm{x}}mathrm{O}_{1+delta})$ environments. These alloy films are nanocrystalline with rocksalt structure. We demonstrated that in the alloy composition range of $0.38leq mathrm{x}leq 0.52, text{Ni}_{mathrm{x}}text{Cd}_{1-mathrm{x}}mathrm{O}_{1+delta}$ films with bipolar (i.e., ${n-}$ or $p$ -type) conductivity can be achieved by controlling the oxygen stoichiometry. Within this composition range the band gap of the alloy is ∼3-3.3 eV with transmittance >50% in the visible range. The unusual electrical and optical properties of $text{Ni}_{mathrm{x}}text{Cd}_{1-mathrm{x}}mathrm{O}_{1+delta}$ alloy thin films can be explained by the modifications of the electronic band structure due to anticrossing interactions between localized Ni d levels and extended valence and conduction band states of the alloy. In addition, we studied the transport mechanism of $p$ -type $text{Ni}_{mathrm{x}}text{Cd}_{1-mathrm{x}}mathrm{O}_{1+delta}$ alloy films and found that the hole mobility increases with temperature in the range of 400-450 K. This is consistent with hole transport via a small polaron hopping process with an activation energy $Ea$ of 0.174 eV ( $mathrm{x}=1$ ) to 0.331 eV ( $mathrm{x}=0.47$ ). These results strongly suggest that the nanocrystalline $text{Ni}_{mathrm{x}}text{Cd}_{1-mathrm{x}}mathrm{O}_{1+delta}$ alloy system has great technological potential for applications in transparent optoelectronic device." @default.
- W2970208844 created "2019-09-05" @default.
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- W2970208844 date "2019-05-01" @default.
- W2970208844 modified "2023-09-24" @default.
- W2970208844 title "Transparent $mathbf{Ni}_{mathbf{x}}mathbf{Cd}_{1-mathbf{x}}mathbf{O}_{1+boldsymbol{delta}}$ alloy thin films with bipolar conductivity" @default.
- W2970208844 doi "https://doi.org/10.1109/iciprm.2019.8819291" @default.
- W2970208844 hasPublicationYear "2019" @default.
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