Abstract PEDOT films were fabricated by vapor-phase polymerization (VPP) with different inhibitor contents in oxidant-containing solutions, and were characterized by X-ray diffraction, Raman spectroscopy, UV/vis transmittance spectra, atomic force microscopy, electrical conductivity and electrochromic measurements. The imidazole which serves as an inhibitor plays key roles on the polymerization reaction, and varying its content results in drastically different properties of the PEDOT films. In the imidazole/Fe(III) p-toluenesulfonate (Im/Fe) weight ratio range of 0∼0.25, the rate of polymerization can be significantly slowed down by increasing the Im/Fe ratio. The optimum Im/Fe ratio of 0.1 and polymerization time of 3 h results in PEDOT films with the highest conductivity on glass substrate (626 S/cm). Higher doping level is found in PEDOT films fabricated with the Im/Fe ratio above 0.1, causing low conductivity due to their loose morphology. The electrochromic properties of the films can be enhanced by prolonging the polymerization time to 3 h. It is found that the transmittance difference at 550 nm is above 10 % in PEDOT films fabricated with 3 h of polymerization. An electrochromic device is assembled and its coloring time is less than 3 s.

中文翻译：

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以咪唑为抑制剂的 PEDOT 薄膜可控气相聚合及其电致变色性能

摘要 PEDOT薄膜在含氧化剂溶液中采用不同抑制剂含量的气相聚合（VPP）制备，并通过X射线衍射、拉曼光谱、紫外/可见光透射光谱、原子力显微镜、电导率和电致变色测量进行表征。 . 作为抑制剂的咪唑在聚合反应中起着关键作用，改变其含量会导致 PEDOT 薄膜的性质截然不同。在咪唑/Fe(III)对甲苯磺酸盐(Im/Fe)重量比范围为0~0.25时，通过增加Im/Fe比可以显着减慢聚合速率。0.1 的最佳 Im/Fe 比和 3 小时的聚合时间导致 PEDOT 薄膜在玻璃基板上具有最高的电导率 (626 S/cm)。在以高于 0.1 的 Im/Fe 比率制造的 PEDOT 薄膜中发现更高的掺杂水平，由于它们的松散形态导致低导电率。将聚合时间延长至 3 小时可提高薄膜的电致变色性能。发现在聚合 3 小时后制备的 PEDOT 薄膜中，550 nm 处的透射率差异大于 10%。组装电致变色装置，其着色时间小于3 s。