对电极涂覆AgNWs对聚3-(2-羟乙基)噻吩变色性能的影响

Influence of Coating Silver Nanowires on Counter Electrode on the Electrochromic Properties of Poly(3-thiopheneethanol)

为提高聚噻吩类衍生物电致变色器件的响应速度和循环稳定性,采用电化学聚合法制备聚3(2羟乙基)噻吩(P3TE)薄膜,同时将银纳米线(AgNWs)分散液滴涂到ITO玻璃上制得AgNWs导电薄膜,分别以ITO玻璃上的P3TE和AgNWs薄膜为工作电极和对电极,与凝胶电解质一起组装成电致变色器件。采用多种分析方法对薄膜的组成、结构、透过率和形貌以及器件性能进行表征。研究结果表明,AgNWs/ITO在波长589 nm处的透过率较高(达到80%),对器件的透过率影响不大;与单一P3TE薄膜器件相比,对电极涂覆AgNWs的P3TE器件响应时间明显缩短(着色和褪色时间分别为5.94 s和0.68 s),且循环稳定性得到改善。

The study aims to improve the response speed and cycle stability of polythiophene derivatives based electrochromic devices(ECDs).Poly(3-thiopheneethanol)(P3TE)films were prepared by electrochemical polymerization.And AgNWs conductive films were obtained by dripping the dispersion of silver nanowires(AgNWs)onto ITO glass.Then,P3TE and AgNWs films on ITO glass were used as the working electrode and the counter electrode,which were integrated with gel electrolyte in contact into the ECDs.The composition,structure,transmittance and morphology of films and the electrochromic properties of the devices were characterized by a variety of analytical methods.The results show that the transmittance of AgNWs/ITO was high(up to 80%)at 589 nm,having little effect on the transmittance of ECDs.Compared with ECD based on single P3TE film,the response time of P3TE ECD with the counter electrode coated with AgNWs was significantly shortened(the coloration time and bleaching time were 5.94 and 0.68 s,respectively),and its cycle stability was improved.