题目：

The Effect of Molecular Geometry on the Polymer/Fullerene Ratio in Polymer Solar Cells

作者：

Jianyu Yuan, Yu Liu, Huilong Dong, Xiaobo Shi, Zeke Liu, Youyong Li and Wanli Ma*

单位：

Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren-Ai Road, Suzhou Industrial Park, Suzhou, Jiangsu 215123, P. R. China.

摘要：

In order to reveal the correlation between molecular structures and the corresponding film morphology as well as polymer/fullerene blend ratio, a new donor-acceptor (D-A) polymer poly-(benzodithiophene- naphthothiophenedione) (PTN8) based on and was synthesized, which was intentionally designed to further increase the molecular structure bulkiness of our previous reported polymer poly-(benzodithiophene-thienopyrroledione) (PTP8). The experimental results and theoretical calculations indicate that both polymers have similar solubility, optical property and energy levels, while the structure modification has a significant impact on the polymer intermolecular packing and crystallinity by altering the backbone coplanarity. The different molecular geometry leads to significantly different device performance, optimal fullerene loadings and efficiency dependence on blend ratios. Therefore molecular geometry should be carefully considered when rationally designing polymers for reducing the use of fullerene.

影响因子：

5.520

分区情况：

2区

链接：

http://pubs.rsc.org/en/content/articlelanding/2015/py/c5py00893j