室温溶液制备半嵌入银纳米线复合透明电极

Preparation of semi embedded silver nanowire composite transparent electrode in room temperature solution

采用室温下聚合物溶液一步降阻工艺,在裸银纳米线电极[以聚对苯二甲酸乙二醇酯(PET)为衬底]表面涂覆羟乙基纤维素(HEC)溶液,制备了纤维素银纳米线复合透明电极(HEC-Ag NWs-PET)。通过SEM、AFM、UV-Vis及薄层电阻对电极表面形貌和性能进行了表征与测试。结果表明,裸银纳米线电极表面涂覆质量分数为0.50%(以溶剂质量计)的HEC溶液后,其初始薄层电阻从27.0?/sq降低至14.0?/sq,透光率为87.7%。HEC溶液形成的纳米膜对电极的透光率基本没有影响,但降低了电极表面粗糙度。复合电极在12 d的加速降解测试中表现出优异的电化学稳定性,并且在2500次内弯曲、外弯曲测试中,其电阻分别变为初始时的1.36和1.46倍,远小于裸银纳米线电极的电阻变化量。

A one-step resistance reduction process of polymer solution at room temperature was developed,by which hydroxyethyl cellulose(HEC)solution was coated on the surface of bare silver nanowire electrode to prepare cellulose-silver nanowire composite transparent electrode.The surface morphology and properties of electrodes obtained were characterized and analyzed by SEM,AFM,UV-Vis and sheet resistance test.The results showed that the initial sheet resistance of the electrode was reduced from 27.0?/sq to 14.0?/sq,and the transmittance was 87.7%when the bare silver nanowire electrode was coated with HEC solution at mass fraction of 0.50%(based on the mass of the solvent).The nanofilm formed by HEC solution reduced the surface roughness of the electrode while showed little effect on the transmittance of the electrode.Moreover,the composite electrode exhibited excellent chemical stability in the 12 d accelerated degradation test,and its resistance changed by 1.36 and 1.46 times of the intial value,respectively,in 2500 internal and external bending tests,which was much smaller than those of the bare silver nanowire electrode.