Copper nanowire (Cu NW) transparent electrodes have attracted considerable attention due to their outstanding electrical properties, flexibility and low cost. However, complicated post-treatment techniques are needed to obtain good electrical conductivity, because of the organic residues and oxide layers on the surface of the Cu NWs. In addition, commonly used methods such as thermal annealing and acid treatment often lead to nanowire damage. Herein, a TiO₂ sol treatment was introduced to obtain Cu NW transparent electrodes with superb performance (13 Ω/sq @ 82% T) at room temperature within one minute. Polymer solar cells with excellent flexibility were then fabricated on the copper nanowire-TiO₂-polyacrylate composite electrode. The power conversion efficiency (PCE) of the cells based on a blend of poly(3-hexylthiophene) (P3HT) and phenyl-C₆₁-butyric acid methyl ester (PC₆₁BM) reached 3.11%, which was better than the control devices that used indium tin oxide (ITO)-PET electrodes, and outperforms other Cu NW based organic solar cells previously reported. The PCE of the solar cells based on Cu NW electrodes remained at 90% after 500 cycles of bending, while the PET/ITO solar cells failed after 20 and 200 cycles, with sheet resistance of 35 and 15 Ω/sq, respectively.

Open image in new window

铜纳米线（Cu NW）透明电极由于其出色的电性能，柔性和低成本而备受关注。然而，由于Cu NWs表面上的有机残留物和氧化物层，需要复杂的后处理技术以获得良好的导电性。另外，诸如热退火和酸处理之类的常用方法经常导致纳米线损坏。这里，引入TiO ₂溶胶处理以获得在室温下在一分钟内具有优异性能（13Ω/ sq @ 82％T）的Cu NW透明电极。然后在铜纳米线-TiO ₂上制备了具有优异柔韧性的聚合物太阳能电池-聚丙烯酸酯复合电极。基于聚（3-己基噻吩）（P3HT）和苯基-C _61-丁酸甲酯（PC ₆₁ BM）的混合物的电池的功率转换效率（PCE）达到3.11％，优于对照设备它使用了铟锡氧化物（ITO）-PET电极，性能优于先前报道的其他基于Cu NW的有机太阳能电池。在弯曲500个循环后，基于Cu NW电极的太阳能电池的PCE保持90％，而在20和200个循环后，PET / ITO太阳能电池失效，其薄层电阻分别为35和15Ω/ sq。

在新窗口中打开图像