题目：

High Efficiency All-Polymer Solar Cells Realized by Synergistic Effect between Polymer Side-Chain Structure and Solvent Additive

作者：

Jianyu Yuan and Wanli Ma*

单位：

Institute of Functional Nano & So� 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：

By introducing different number of alkyl aromatic side-chains to the donor polymers containing Benzo[1,2-b:4,5-b']dithiophene (BDT) and thieno[3,4-c]pyrrole-4,6-dione (TPD), the performance of all-polymer solar cells was greatly improved. A high open circuit voltage (Voc = ~1.0 V) and an optimized power conversion efficiency of 4.35% were obtained after the addition of 0.5% 1,8-diiodooctane (DIO), which is among the highest reported efficiencies for all polymer solar cells. The effect of alkyl aromatic side-chains and solvent additive on the device morphology and performance was systematically studied. The introduction of conjugated side chains is beneficial to the intermolecular [small pi]-[small pi] stacking and hence improves polymer crystallinity as well as hole mobility. More importantly, we discovered that alkyl aromatic side-chains and DIO can work synergistically to restore the intermolecular stacking of donor/acceptor polymers in the as-cast amorphous blend film and meanwhile develop fine phase segregation for efficient charge dissociation and transport. Although higher efficiencies for all-polymer solar cells have been reported, our work may propose a more universal and facile designing method to tailor existing polymers to achieve high performance in all-polymer photovoltaic devices.

影响因子：

7.443

分区情况：

1区

链接：

http://pubs.rsc.org/en/content/articlepdf/2015/ta/c4ta06648k