Song Wei, Peng Ruixiang, Huang Like, Liu Chang, Fanady Billy, Lei Tao, Hong Ling, Ge Jinfeng, Facchetti Antonio, Ge Ziyi
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China.
Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo, 315201, China.
iScience. 2020 Apr 24;23(4):100981. doi: 10.1016/j.isci.2020.100981. Epub 2020 Mar 13.
Environment-friendly manufacturing and mechanical robustness are imperative for commercialization of flexible OSCs as green-energy source, especially in portable and wearable self-powered flexible electronics. Although, the commonly adopted PEDOT:PSS electrodes that are treated with severely corrosive and harmful acid lack foldability. Herein, efficient folding-flexible OSCs with highly conductive and foldable PEDOT:PSS electrodes processed with eco-friendly cost-effective acid and polyhydroxy compound are demonstrated. The acid treatment endows PEDOT:PSS electrodes with high conductivity. Meanwhile, polyhydroxy compound doping contributes to excellent bending flexibility and foldability due to the better film adhesion between PEDOT:PSS and PET substrate. Accordingly, folding-flexible OSCs with high efficiency of 14.17% were achieved. After 1,000 bending or folding cycles, the device retained over 90% or 80% of its initial efficiency, respectively. These results represent one of the best performances for ITO-free flexible OSC reported so far and demonstrate a novel approach toward commercialized efficient and foldable green-processed OSCs.
作为绿色能源，环境友好型制造和机械稳健性对于柔性有机太阳能电池（OSCs）的商业化至关重要，尤其是在便携式和可穿戴自供电柔性电子产品中。尽管常用的经强腐蚀性有害酸处理的聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT:PSS）电极缺乏可折叠性。在此，展示了具有高导电性和可折叠PEDOT:PSS电极的高效可折叠柔性OSCs，该电极采用环保且经济高效的酸和多羟基化合物进行处理。酸处理赋予PEDOT:PSS电极高导电性。同时，多羟基化合物掺杂由于PEDOT:PSS与聚对苯二甲酸乙二酯（PET）基板之间更好的薄膜附着力而有助于实现出色的弯曲柔韧性和可折叠性。因此，实现了效率高达14.17%的可折叠柔性OSCs。经过1000次弯曲或折叠循环后，该器件分别保留了其初始效率的90%以上或80%以上。这些结果代表了迄今为止报道的无铟锡氧化物（ITO）柔性OSC的最佳性能之一，并展示了一种实现商业化高效且可折叠的绿色处理OSC的新方法。
