转印法制备薄膜太阳能电池用银纳米线–聚合物复合透明导电薄膜

Preparation of Silver Nanowire–Polymer Composite Transparent Conductive Films by Transfer Method for Thin Film Solar Cells

以自制银纳米线分散液为原料,聚氨酯（PU）为可剥落树脂,在聚对苯二甲酸乙二醇酯（PET）衬底上,利用转印法制备了可用于薄膜太阳能电池的银纳米线–可剥离树脂复合透明导电薄膜,并采用四探针测试仪、紫外–可见光光度计等技术测试了其方块电阻、可见光波段透过率和雾度,分析了分散液浓度、热处理温度与时间对银纳米线透明导电薄膜光电性能的影响。结果表明：随着分散液浓度的降低,银纳米线透明导电薄膜的透过率提高,但同时方块电阻增大;热处理可显著改善透明导电薄膜的导电性,透明导电薄膜的方块电阻随着热处理温度增加、时间延长均呈现出先降低后升高的现象,透过率则随热处理温度增加而提高;在150℃热处理5 min后,银纳米线透明导电薄膜的方块电阻为42Ω/sq,透过率为85.7%,雾度13.52%。

Silver nanowire-polymer composite transparent conductive films （TCFs） for thin fill solar cells were fabricated via a transfer method by coating silver nanowires and PU on polyethylene terephthalate substance, and the transmission spectra and sheet resistance of TCFs were examined by four-probe tester, UV-Vis spectrophotometry and other techniques. The effects of silver nanowires concentration and heat treatment on the properties of the films were investigated. The experimental result shows that the transmittance of TCFs and the sheet resistance increase with the decrease of concentration. Heat-treatment can significantly improve the conductivity of TCF. The sheet resistance firstly reduces and then increases with the increase of heat-treatment temperature and time. The TCFs with sheet resistance of 42 Ω/sq, transmittance of 85.7%, and haze of 13.52% are obtained after heat-treatment at 150 ℃ for 5min.