Abstract In this work, electrochromic polymer (ECP)/exfoliated graphene (EG)/silver nanowires (AgNWs) composite film on indium tin oxide (ITO) substrate (ECP/EG/AgNWs/ITO) is prepared, and further assembled into the electrochromic device (ECD). We investigate the performance, bleaching and coloration kinetics of device based on the composite film using polythiothene (PT) as model polymer. The results indicate that the ECD based on PT/EG/AgNWs/ITO possesses large optical contrast (36%), high coloration efficiency (234 cm2/C), fast response time (the coloration and bleaching time are 6.63 and 0.71 s), and exhibits stable cycling. In comparison with the device based on PT film on bare ITO (PT/ITO), the optical contrast of device based on PT/EG/AgNWs/ITO is doubled (18 → 36%), and its coloration efficiency increases by 42% (165 → 234 cm2/C). Additionally, we can find that the dynamic processes of bleaching and coloration are all divided into three parts: I, primary stage; II, middle stage; III, late stage. The primary bleaching and coloration are completed in the first two stages. In stage II, the rate constants of bleaching and coloration can be obtained from the linear regression curves, and these rate constants of ECD based on PT/EG/AgNWs/ITO are higher. This study lays a foundation for quantitative analysis of bleaching and coloration processes and the construction of EC kinetic model.

中文翻译：

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基于PT/EG/AgNWs复合膜的电致变色器件的漂白和着色动力学

摘要 本工作制备了氧化铟锡 (ITO) 衬底上的电致变色聚合物 (ECP)/剥离石墨烯 (EG)/银纳米线 (AgNWs) 复合膜 (ECP/EG/AgNWs/ITO)，并进一步组装成电致变色材料。设备 (ECD)。我们研究了基于使用聚噻吩 (PT) 作为模型聚合物的复合膜的装置的性能、漂白和着色动力学。结果表明，基于 PT/EG/AgNWs/ITO 的 ECD 具有大光学对比度（36%）、高着色效率（234 cm2/C）、响应时间快（着色和漂白时间分别为 6.63 和 0.71 s），并表现出稳定的循环。与基于裸ITO（PT/ITO）上的PT薄膜的器件相比，基于PT/EG/AgNWs/ITO的器件的光学对比度提高了一倍（18→36%），其着色效率提高了42%（ 165 → 234 平方厘米/摄氏度）。此外，我们可以发现漂白和着色的动态过程都分为三个部分：I，初级；二、中期；三、后期。初级漂白和着色在前两个阶段完成。在第二阶段，漂白和着色的速率常数可以从线性回归曲线中获得，这些基于 PT/EG/AgNWs/ITO 的 ECD 的速率常数更高。本研究为漂白着色过程的定量分析和EC动力学模型的构建奠定了基础。漂白和着色的速率常数可以从线性回归曲线中获得，这些基于 PT/EG/AgNWs/ITO 的 ECD 的速率常数更高。本研究为漂白着色过程的定量分析和EC动力学模型的构建奠定了基础。漂白和着色的速率常数可以从线性回归曲线中获得，这些基于 PT/EG/AgNWs/ITO 的 ECD 的速率常数更高。本研究为漂白着色过程的定量分析和EC动力学模型的构建奠定了基础。