The TiO₂ films are directly prepared on FTO-coated substrates by a facile solvothermal method. The influence of ethanol content in precursor on the microstructure and electrochromic performance of TiO₂ films is studied. The X-Ray diffraction result shows that the prepared TiO₂ samples are crystalline. When the ethanol contents of 20% and 30%, the TiO₂ films show (010) preferred orientation and fluffy porous structure. Analysis results of electrochromic performance indicate that the TiO₂ film synthesized with the ethanol content of 20% exhibits the highest transmittance modulation (ΔT_{780 nm} = 75.4%), the fastest switching times (bleaching time: 8.9 s, coloration time: 12.2 s) and the largest coloration efficiency (CE = 78 cm²/C). In addition, the cyclic voltammetry measurements confirm that the film synthesized with the ethanol content of 20% exhibits high cyclic stability (1000 cycles).

TiO ₂薄膜是通过简便的溶剂热法直接在 FTO 涂层的基材上制备的。研究了前驱体中乙醇含量对TiO ₂薄膜微观结构和电致变色性能的影响。X射线衍射结果表明制备的TiO ₂样品为结晶态。当为20％和30％的乙醇含量，在TiO ₂膜显示（010）择优取向和蓬松多孔结构。电致变色性能分析结果表明，乙醇含量为20%时合成的TiO ₂薄膜表现出最高的透射率调制（Δ T _{780 nm} = 75.4%)，最快的转换时间（漂白时间：8.9 s，着色时间：12.2 s）和最大的着色效率（CE  = 78 cm ² /C）。此外，循环伏安测量证实，以 20% 的乙醇含量合成的薄膜表现出高循环稳定性（1000 次循环）。