F_(16)CuPc作为阳极缓冲层对有机太阳能电池性能的显著改善

Significant Enhanced Performance of Organic Solar Cells with F_(16)CuPc as The Anode Buffer Layer

采用F16CuPc作为有机太阳能电池的阳极缓冲层可使器件的性能得到显著提高。F16CuPc的引入,一方面可以实现CuPc分子的定向生长,从而改善CuPc薄膜的结晶度,提高其空穴迁移率;另一方面在F16 CuPc/CuPc界面处可形成偶极层,改善空穴的输出效率。以上两个作用有效提高了器件的载流子收集效率,降低了器件的串联电阻和光生载流子复合几率,从而提高了器件的短路电流和填充因子。同时,F16CuPc的引入使器件的内建电场增大,提高了器件的开路电压。

Significant enhanced performance of organic solar cells with F16CuPc as the anode buffer layer was demonstrated.On the one hand,the adopted F16CuPc anode buffer layer leads to the oriented growth of the CuPc molecules,resulting in the increased crystallinity and hence the hole mobility of the CuPc film.On the other hand,a dipole layer can be formed in the F16CuPc/CuPc interface,which can improve the hole extraction efficiency from CuPc to ITO.Owing to these tow effects,the charge carriers collection efficiency was raised,while the series resistance and the photogenerated charge carrier recombination probability were decreased.Consequently,the short-circuit current and the fill factor were increased.Meanwhile,the built-in potential of the devices was also increased by the introduction of F16CuPc,leading to an increased open-circuit voltage.