Abstract

Vanadium dioxide (VO₂) undergoes a reversible metal-insulator transition at low temperature, which has wide range of applications in smart windows and infrared detectors. However, the preparation of VO₂ films with controllable phase on glass substrate is still limited. In this paper, it is shown that B-phase can be transformed into M-phase with monoclinic structure by inserting TiO₂ buffer layer on glass substrate at low temperature of 400°C. This crystalline transformation might be attributed to that Ti atoms diffuse and form oxygen-deficient environments. Different thicknesses of buffer layers have different effect on characteristic of VO₂ film. With 50-nm TiO₂ buffer layer, the VO₂|TiO₂|glass film showed an abrupt resistance change with more than 2.5-order of magnitude across metal–insulator transition, and the visible-light transmittance value is as high as 55.5% with the solar modulation capability up to 8.6%. The current results are very important for the application in smart windows.

中文翻译：

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TiO 2缓冲层的插入对VO 2 |玻璃中晶体结构转变的影响及其在智能窗中的应用

摘要

二氧化钒（VO ₂）在低温下经历可逆的金属-绝缘体转变，在智能窗户和红外探测器中具有广泛的应用范围。然而，在玻璃基板上制备具有可控相的VO ₂膜仍然受到限制。本文表明，通过在400℃的低温下将TiO ₂缓冲层插入玻璃基板，可以将B相转变为具有单斜晶结构的M相。这种晶体转变可能归因于Ti原子扩散并形成缺氧环境。缓冲层的不同厚度对VO ₂膜的特性有不同的影响。通过50 nm TiO ₂缓冲层，VO ₂| TiO ₂ |玻璃膜在整个金属-绝缘体过渡过程中显示出突然的电阻变化，幅度超过2.5个数量级，可见光透射率值高达55.5％，太阳调制能力高达8.6％。当前结果对于智能窗口中的应用非常重要。