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Electro-thermal control of aluminum-doped zinc oxide/vanadium dioxide multilayered thin films for smart-device applications

机译:智能设备应用中的铝掺杂氧化锌/二氧化钒多层薄膜的电热控制

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摘要

We demonstrate the electro-thermal control of aluminum-doped zinc oxide (Al:ZnO) /vanadium dioxide (VO2) multilayered thin films, where the application of a small electric field enables precise control of the applied heat to the VO2 thin film to induce its semiconductor-metal transition (SMT). The transparent conducting oxide nature of the top Al:ZnO film can be tuned to facilitate the fine control of the SMT of the VO2 thin film and its associated properties. In addition, the Al:ZnO film provides a capping layer to the VO2 thin film, which inhibits oxidation to a more energetically favorable and stable V2O5 phase. It also decreases the SMT of the VO2 thin film by approximately 5–10 °C because of an additional stress induced on the VO2 thin film and/or an alteration of the oxygen vacancy concentration in the VO2 thin film. These results have significant impacts on technological applications for both passive and active devices by exploiting this near-room-temperature SMT.
机译:我们展示了铝掺杂的氧化锌(Al:ZnO)/二氧化钒(VO2)多层薄膜的电热控制,其中小电场的施加可以精确控制对VO2薄膜施加的热量以感应其半导体金属过渡(SMT)。可以调整顶部Al:ZnO膜的透明导电氧化物的性质,以促进对VO2薄膜的SMT及其相关性能的精细控制。此外,Al:ZnO膜为VO2薄膜提供了覆盖层,可将氧化抑制为能量更有利和稳定的V2O5相。由于在VO2薄膜上引起的附加应力和/或VO2薄膜中氧空位浓度的变化,它还使VO2薄膜的SMT降低了大约5-10°C。通过利用这种接近室温的SMT,这些结果对无源和有源器件的技术应用都有重大影响。

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