There is a pressing need for efficient strategies to produce new colors in electrochromic (EC) systems. The majority of studies to date have been conducted on the development of advanced synthesis routes for obtaining desired colors in EC materials, but they suffer from complicated synthesis and high costs. Herein, we developed a facile, viable, and efficient approach for tuning EC behavior of polyaniline (PANI) using three polymeric dyes: poly(neutral red) (PNR), poly(crystal violet) (PCV), and poly(Congo red) (PCR) films as color filters. PNR, PCV, and PCR films were electrodeposited on a fluorine-doped tin oxide (FTO) electrode modified with Schiff base network-1 (SNW1) to fabricate FTO/SNW1/PNR, FTO/SNW1/PCV, and FTO/SNW1/PCR, respectively. To inquire about the effects of studied polymeric dyes on the EC performance of PANI, aniline was electropolymerized onto the modified electrodes. The fabrication of the PANI-based EC electrodes, namely FTO/SNW1/PNR/PANI, FTO/SNW1/PCV/PANI, and FTO/SNW1/PCR/PANI, was characterized using cyclic voltammetry, EIS, FT–IR, XRD, FESEM, TEM and spectroelectrochemical approaches. The EC studies confirmed that FTO/SNW1/PNR/PANI, FTO/SNW1/PCV/PANI, and FTO/SNW1/PCR/PANI electrodes change their color in the oxidized states to pale red, yellowish-green, and blue, respectively, if reduced at − 0.6 V. Combining PANI film with three different polymeric dyes can produce new colors in the reduced state of PANI film. FTO/SNW1/PANI, FTO/SNW1/PNR/PANI, FTO/SNW1/PCV/PANI, and FTO/SNW1/PCR/PANI showed high optical contrasts of 66%, 54%, 64%, and 78%, respectively, at 700 nm. This effort provides a new approach for tuning the EC behavior of PANI and puts forward an idea to produce new colors via organic color filters.

中文翻译：

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聚（中性红）、聚（结晶紫）和聚（刚果红）薄膜作为滤色片，用于在聚苯胺电致变色系统中产生新的颜色状态

迫切需要有效的策略来在电致变色（EC）系统中产生新的颜色。迄今为止，大多数研究都是为了开发先进的合成路线来获得EC材料所需的颜色，但它们的合成复杂且成本高昂。在此，我们开发了一种简单、可行且有效的方法，使用三种聚合物染料来调节聚苯胺 (PANI) 的 EC 行为：聚（中性红）（PNR）、聚（结晶紫）（PCV）和聚（刚果红） (PCR) 薄膜作为滤色片。将 PNR、PCV 和 PCR 薄膜电沉积在经过席夫碱网络 1 (SNW1) 修饰的氟掺杂氧化锡 (FTO) 电极上，以制备 FTO/SNW1/PNR、FTO/SNW1/PCV 和 FTO/SNW1/PCR ， 分别。为了探究所研究的聚合物染料对 PANI EC 性能的影响，将苯胺电聚合到修饰电极上。使用循环伏安法、EIS、FT-IR、XRD、 FESEM、TEM 和光谱电化学方法。EC研究证实，FTO/SNW1/PNR/PANI、FTO/SNW1/PCV/PANI和FTO/SNW1/PCR/PANI电极在氧化状态下的颜色分别变为浅红色、黄绿色和蓝色，如果在 − 0.6 V 下还原。将 PANI 薄膜与三种不同的聚合物染料组合可以在 PANI 薄膜的还原状态下产生新的颜色。FTO/SNW1/PANI、FTO/SNW1/PNR/PANI、FTO/SNW1/PCV/PANI 和 FTO/SNW1/PCR/PANI 分别显示出 66%、54%、64% 和 78% 的高光学对比度，在 700 nm 处。这项工作提供了一种调整 PANI EC 行为的新方法，并提出了通过有机滤色片产生新颜色的想法。