Abstract In the present study, we fabricated fluorine-doped tin oxide (FTO) films with different sheet resistances (~10 Ω/□, ~6 Ω/□, and ~3 Ω/□) prepared through the adjustment of deposition time during the horizontal ultrasonic spray pyrolysis deposition (HUSPD) and investigated the effect of electrochromic (EC) performances with different sheet resistances of the FTO films used as transparent conducting electrodes. The results demonstrated that, owing to the increased electrochemical activity, the decrease of sheet resistance accelerated switching speeds of the EC devices. However, for the coloration efficiency (CE), the FTO films with the optimum sheet resistance of ~6 Ω/□ exhibited the highest value as compared to the other samples. The improvement of the CE value can be mainly attributed to high transmittance modulation by the uniform surface morphology of the FTO films to reduce interfacial light-scattering between the WO 3 films and FTO films. Therefore, our results provide a valuable insight into the improvement of the performance of the EC devices using the optimum sheet resistance (~6 Ω/□) of the FTO films.

中文翻译：

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用于高性能电致变色器件的氟掺杂氧化锡薄膜的薄层电阻依赖性

摘要 在本研究中，我们通过在沉积过程中调整沉积时间制备了具有不同薄层电阻（~10 Ω/□、~6 Ω/□ 和~3 Ω/□）的掺氟氧化锡 (FTO) 薄膜。水平超声喷雾热解沉积 (HUSPD) 并研究了用作透明导电电极的 FTO 薄膜的不同薄层电阻对电致变色 (EC) 性能的影响。结果表明，由于电化学活性的增加，薄层电阻的降低加速了 EC 器件的开关速度。然而，对于着色效率 (CE)，与其他样品相比，具有 ~6 Ω/□ 最佳薄层电阻的 FTO 薄膜表现出最高值。CE 值的提高主要归因于 FTO 薄膜表面形态均匀的高透射率调制，以减少 WO 3 薄膜和 FTO 薄膜之间的界面光散射。因此，我们的结果为使用 FTO 薄膜的最佳薄层电阻 (~6 Ω/□) 改进 EC 器件的性能提供了宝贵的见解。