题目：

Diketopyrrolopyrrole based Highly Crystalline Conjugated Molecules for Application in Small Molecule Donor-Polymer Acceptor Nonfullerene Organic Solar Cells

作者：

Jianyu Yuan* and Wanli Ma**

单位：

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

摘要：

In order to specifically investigate the low efficiency of small molecule donor-polymer acceptor (M-P) nonfullerene organic solar cells, we have successfully modify the synthesis of a series of D-π-A-π-D conjugated molecules containing diketopyrrolopyrrole (DPP) and different end groups. By incorporation of end group with different size of π-conjugation (benzene, naphthalene and pyrene), we further improved the fill factor (FF) and short current density (J_sc) of the donors molecule. Our experimental results and theoretical calculations have proven that the size of the end groups can influence the molecule crystallinity, mobility and intermolecular packing by altering the molecular coplanarity. As the result of improved crystallinity, morphology and fine-tuned mobilities, we demonstrated an increased FF, a high J_sc of ~4.5 mA/cm² and a power conversion efficiency of 2.05 %, which is among the highest efficiency reported for M-P nonfullerene solar cells. Our results provide opportunities and possibilities of achieving higher performance M-P nonfullerene solar cells in the future.

影响因子：

3.471

分区情况：

二区

链接：

http://www.sciencedirect.com/science/article/pii/S1566119916304487

（责任编辑：向丹婷 联系方式：dtxiang@suda.edu.cn）