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

摘要:

采用室温下聚合物溶液一步降阻工艺，在裸银纳米线电极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-AgNWs-PET）。通过SEM、AFM、UV-Vis等对电极表面形貌和性能进行了表征与测试。结果表明，在裸银纳米线电极表面涂覆质量分数为0.50%的HEC溶液后，将电极（透光率为87.7%）的初始薄层电阻从27 Ω·sq-1降低至14 Ω·sq-1，而对透光率几乎无影响。HEC溶液形成的纳米膜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2400次内外弯曲测试中，其阻值分别变为1.35和1.45倍，远小于裸银纳米线电极的阻值变化量。

Abstract:

A one-step resistance reduction process of polymer solution at room temperature was developed, and 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 the electrodes were characterized and tested by SEM, AFM, UV-Vis, etc. The results showed that the initial sheet resistance of the electrode (transmittance of 87.7%) is reduced from 27 Ω·sq-1 to 14 Ω·sq-1 after coating the surface of the bare silver nanowire electrode with 0.50% HEC solution, while having little effect on light transmittance. Meanwhile, the nanofilm formed by the HEC solution reduced the electrode surface roughness. The composite electrode exhibited excellent chemical stability in the 12 day accelerated degradation test, and its resistance changed by 1.35 and 1.45 times, respectively, in 2400 internal and external bending tests, which was much smaller than that of the bare silver nanowire electrode.