Abstract As transparent conducting oxides (TCOs) have been widely used as a common component of many optoelectronic applications, ensuring high conductivity and transparency TCOs has become a pivotal concern. In the present study, we report developing the combustion-activated pyrolysis route of horizontal ultrasonic spray pyrolysis deposition (HUSPD) as a novel strategy to form highly transparent conducting fluorine-doped tin oxide (FTO) films. Compared to the basic route, the combustion-activated FTO films showed an attractive transparent conducting performance (figure of merit of 5.34 × 10−2 Ω−1) with a highly improved optical transparency (90.1%) due to the formation of a smooth and dense film structure to reduce light scattering on the surface, and a decrease of oxygen vacancies to broaden the optical bandgap, all of which yielded an excellent performance as compared to the previously reported studies on the FTO films. Moreover, when the combustion-activated FTO films were used as TCOs of electrochromic devices and dye-sensitized solar cells, they acquired multifunctional effects of (a) an efficient electron transfer by (200) preferred orientations of the FTO; (b) a relaxed light scattering on the interface due to smooth and dense surface morphology of the FTO films; and (c) a broad optical bandgap by decreased oxygen vacancies, resulting in an impressive improvement of both electrochromic and photovoltaic performances. Taken together, our results demonstrate that combustion-activated FTO films are an attractive technique for forming high-performance TCOs that can further be used in multifunctional optoelectronic devices.

中文翻译：

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具有高光学透明性的燃烧活化掺氟氧化锡薄膜的光电多功能性

摘要 由于透明导电氧化物 (TCO) 已被广泛用作许多光电应用的常见组件，因此确保高导电性和透明度的 TCO 已成为关键问题。在本研究中，我们报告了开发水平超声喷雾热解沉积 (HUSPD) 的燃烧激活热解路线作为形成高透明导电掺氟氧化锡 (FTO) 薄膜的新策略。与基本路线相比，燃烧激活的 FTO 薄膜显示出有吸引力的透明导电性能（品质因数为 5.34 × 10-2 Ω-1），并且由于形成了光滑和致密的薄膜结构以减少表面上的光散射，并减少氧空位以扩大光学带隙，与之前报道的 FTO 薄膜研究相比，所有这些都产生了优异的性能。此外，当燃烧激活的 FTO 薄膜用作电致变色器件和染料敏化太阳能电池的 TCO 时，它们获得了多功能效应：（a）通过 FTO 的（200）优选取向进行有效的电子转移；(b) 由于 FTO 薄膜的光滑和致密的表面形态，界面上的光散射松弛；(c) 通过减少氧空位获得宽的光学带隙，从而显着提高电致变色和光伏性能。总之，我们的结果表明，燃烧活化的 FTO 薄膜是一种有吸引力的技术，可用于形成可进一步用于多功能光电器件的高性能 TCO。