Effect of solvent mixture on the nanoscale phase separation in polymer solar cells

被引:631
作者
Yao, Yan [1 ,2 ]
Hou, Jianhui [1 ,2 ]
Xu, Zheng [1 ,2 ]
Li, Gang [3 ]
Yang, Yang [1 ,2 ]
机构
[1] Univ Calif Los Angeles, Dept Mat Sci & Engn, Los Angeles, CA 90095 USA
[2] Univ Calif Los Angeles, Calif Nanosyst Inst, Los Angeles, CA 90095 USA
[3] Solarmer Energy Inc, El Monte, CA 91731 USA
关键词
D O I
10.1002/adfm.200701459
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The mixed solvent approach has been demonstrated as a promising method to modify nanomorphology in polymer solar cells. This work aims to understand the unique role of the additive in the mixture solvent and how the optimized nanoscale phase separation develops laterally and vertically during the non-equilibrium spin-coating process. We found the donor/acceptor components in the active layer can phase separate into an optimum morphology with the additive. Supported by AFM, TEM and XPS results, we proposed a model and identified relevant parameters for the additive such as solubility and vapor pressures. Other additives are discovered to show the ability to improve polymer solar cell performance as well.
引用
收藏
页码:1783 / 1789
页数:7
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