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• W4309482572 endingPage "168116" @default.
• W4309482572 startingPage "168116" @default.
• W4309482572 abstract "Cadmium oxide (CdO) is known to have the highest electron mobility among common transparent conductive oxides (TCOs). Here, we carried out a systematic investigation on the properties of CdO films doped with transition metal donors, namely Mo (CMO) and W (CWO) which have been reported to enhance the mobility in In2O3. We find that the electron concentration N in as-grown CMO and CWO increases with dopant concentration to> 1021 cm−3. While the mobility μ increases with rapid thermal annealing (RTA) temperature, N decreases when the temperature is> 400 °C, suggesting that Mo and W are unstable donors. The stronger affinity of the Mo and W to diffuse out in an O2 environment results in an even stronger decrease in N when annealed in O2. Isothermal RTA at 300 °C further reveals that H interstitial donors incorporated during room temperature film growth are unstable at temperature< 300 °C. Overall, both CMO and CWO can achieve a low resistivity of ∼1.5 × 10−4 Ω-cm with μ > 100 cm2/V-s and N∼3.5 × 1020 and 4 × 1020 cm–3, respectively, as well as an overall transmittance> 80% up to λ > 1600 nm with x ≲ 0.01 after RTA at 600 °C in N2. Finally, changes in optical absorption edges Eopt of CMO and CWO are consistent with the modification of the conduction band (CB) due to anticrossing interactions of the dopant d–states with the CdO CB, which also flattens the CB dispersion which dramatically lowers the μ at high x." @default.
• W4309482572 created "2022-11-28" @default.
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• W4309482572 date "2023-02-01" @default.
• W4309482572 modified "2023-10-02" @default.
• W4309482572 title "Effects of transition metal dopants (Mo and W) on electrical and optical properties of CdO thin films" @default.
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• W4309482572 doi "https://doi.org/10.1016/j.jallcom.2022.168116" @default.
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