中文摘要：

氧化铟锡玻璃（ITO）以其优良的导电性能和透过率以及相对低的反应活性使其在显示器和电致变色器件中有广泛的应用.然而,ITO表面的金属氧化物基团也带来了一些问题,如通过物理方法沉积的电致变色薄膜易从ITO基底上脱离,从而降低器件寿命,此种问题在使用液体电解质时显得尤为突出.为此,我们利用有机酸小分子对ITO基底表面进行修饰,继而利用电化学沉积的方法制备聚3,4-（2,2-二甲基丙烯二氧基）噻吩电致变色薄膜.XPS结果表明基底与修饰物间以化学键结合,超声波处理可以看出电致变色薄膜在修饰后的基底上有更好的稳定性.本研究提供了一种简单易行的方法来获得高性能的高分子电致变色薄膜.

英文摘要：

The relatively low reactivity of indium tin oxide （ITO） thin film coated on glass with its good conductivity and transparency make it the widely used electrode in displays and electrochromic devices. However, the inactivity of the surface may cause serious problems for physically deposited electrochromic polymer films from detachment to short durability, especially, in the presence of electrolyte liquids. We here report that significant improvement is made for electrochromic films of poly[3,4-（2,2-dimethylpropylenedioxy）thiophene] by electrodepositing its monomer on ITO surface modified with organic acids. We first designed and synthesized 2-thienyl phosphonic acid which was used to modify ITO glass. ITO glass was im- mersed in modifier solution vertically on a glass bracket and the solution was allowed to evaporate slowly at ambient condi- tion. The glass was removed from the glass bracket when it was fully exposed to the air, and then baked at 120 ℃ for 24 h in glove box. After modification, the modifier molecules are able to react with hydroxyl groups on ITO surface by losing H2O and self assemble to high-order monolayer. X-ray photoelectron spectroscopy results indicate that chemical binding is formed between the surface and the modifier. By attaching the modifier molecules to ITO surface with ester bonds, the surface changes from hydrophilic to hydrophobic, but the transmittance and conductivity remain the same as bare ITO. Atomic force microscope results demonstrate that surface roughness of modified ITO showed a little reduction compared with bare one. To test the mechanical strength of elcctrochromic polymer thin film on different substrate, we treated the films by sonication. The results reveal a much better stability for the film formed on the modified ITO than that on bare one. Meanwhile, color changing property ofelectrochromic polymer film electropolymerized on modified substrate remains the same as that on bare substrate. This study provides a conventional way to achieve high-performance p