Poly(Azure A) (PAA) films doped with sodium dodecyl sulfate (SDS) were grown on transparent indium tin oxide (ITO) glass substrates by cyclic voltammetry. The electrochromism of PAA was investigated by digital video-electrochemistry (DVEC). DVEC consists of the acquisition of sequential digital images during the electro-stimulated changes of PAA color. The evolution of red, green, and blue (R, G, B) colors intensity (I) of analyzed pixels provides enough sensitivity to detect changes of some nmol cm−2 of electroactive centers. Besides, the different time evolution of these color intensities can serve to discern among different electroactive centers activated in the polymer. For the first time, contrast, coloration efficiency, and bleaching times of PAA are calculated by DVEC. The coloration efficiencies were between 15–25 cm2 mC−1 with short response times for the bleaching process between 2.9 and 5.5 s. PAA has good electrochromic performances to be used in electrochromic devices. Our present work provides an important insight into the design principles for a practical application of DVEC to characterize electrochromic devices in light-controlled conditions allowing us to find the best performances of these materials.

中文翻译：

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来自数字视频电化学 (DVEC) 的聚 (Azure A) 薄膜的电致变色性能

通过循环伏安法在透明氧化铟锡 (ITO) 玻璃基板上生长掺杂十二烷基硫酸钠 (SDS) 的聚 (Azure A) (PAA) 薄膜。通过数字视频电化学（DVEC）研究了PAA的电致变色。DVEC 包括在 PAA 颜色的电刺激变化期间获取连续数字图像。分析像素的红色、绿色和蓝色 (R, G, B) 颜色强度 (I) 的演变提供了足够的灵敏度来检测电活性中心的一些 nmol cm-2 的变化。此外，这些颜色强度的不同时间演变可用于区分聚合物中激活的不同电活性中心。DVEC首次计算了PAA的对比度、着色效率和漂白时间。着色效率在 15-25 cm2 mC-1 之间，漂白过程的响应时间很短，在 2.9 到 5.5 秒之间。PAA具有良好的电致变色性能，可用于电致变色器件。我们目前的工作为 DVEC 在光控条件下表征电致变色器件的实际应用提供了重要的设计原则，使我们能够找到这些材料的最佳性能。