题目：

Donor-Acceptor Polymers Based on 5,6-Difluoro-Benzo[1,2,5]thiadiazole for High Performance Solar Cells

作者：

Dandan Tang^a,1, Yanfeng Liu^b,1, Zhe Zhang^c, Qinghai Shu^c,**, Bin Wang^a, Jian Fan^a,*, Bo Song^b,***

单位：

^aJiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou, Jiangsu 215123, China

^bLaboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou 215123, China

^cSchool of Material Science and Engineering, Beijing Institute of Technology, 100081 Beijing, China

摘要：

Two donor-acceptor polymers P8 and P9 based on 5,6-difluoro-benzo[1,2,5]thiadiazole unit have been prepared and applied as the donor materials in polymer solar cells. Due to the slight difference between electronic structures of thiophene and selenophene, P8 and P9 show similar absorption spectra and similar frontier energy levels. However, the pristine P8:PC₇₁BM and P9:PC₇₁BM blend films display distinct morphologies as revealed by AFM measurement. After the addition of DIO, both blend films feature a nanoscale interconnected-network structure, which leads to the enhancement in solar cells performance with PCE up to 6.73% and 6.84% for P8 and P9, respectively. Alternating current impedance spectrometry measurements revealed that high surface roughness could improve the PCE of P8-based PSCs, while in P9-based PSCs DIO can enhance hole and electron mobilities of the active layer.

影响因子：

3.827

分区情况：

2区

链接：

http://www.sciencedirect.com/science/article/pii/S1566119916301136