廖良生教授课题组在Energy & Environmental Science上发表论文

题目：

Non-Fullerene Polymer Solar Cells Based on a Selenophene-Containing Fused-Ring Acceptor with Photovoltaic Performance of 8.6%

作者：

Yongxi Li,^a Lian Zhong,^bc Fu-Peng Wu,^a Yi Yuan,^a Hai-Jun Bin,^b Zuo-Quan Jiang,^*a Zhanjun Zhang,^c  Zhi-Guo Zhang,^*b Yongfang Li^bcd and Liang-Sheng Liao^*a

单位：

^aJiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu, 215123, P. R. China.

^bBeijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.

^cUniversity of Chinese Academy of Sciences, Beijing 100049, China.

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

摘要：

In this work, we present a non-fullerene electron acceptor bearing a fused five-heterocyclic ring containing selenium atoms, denoted as IDSe-T-IC, for fullerene-free polymer solar cells (PSCs). This molecule exhibits a low band gap (Eg = 1.52 eV), strong absorption in the 600-850 nm region and a high LUMO level (-3.79 eV). When a large band gap polymer J51 (Eg = 1.91 eV) was used as the donor, complementary absorption of the polymer donor and acceptor was obtained in the wavelength range of 350–850 nm. The solar cell based on J51:IDSe-T-IC gives a maximum PCE of 8.6%, with a high Voc of 0.91 V, a Jsc of 15.20 mA cm^-2 and a fill factor (FF) of 62.0%. Moreover, this performance is much higher than that of J51:PC₇₁BM based PSCs under similar device fabrication conditions (PCE = 6.0%). The trade-off features of the Jsc and Voc existing in PSCs with fullerene acceptors have been minimized in the fullerenefree PSCs based on IDSe-T-IC and J51. The results demonstrate that fine-tuning the absorption and electronic energy levels of non-fullerene acceptors, and properly selecting a polymer donor to achieve complementary absorption, is a promising way to further improve the performance of the PSCs.

影响因子：

20.523

分区情况：

1区

链接：

http://pubs.rsc.org/en/content/articlehtml/2016/ee/c6ee00315j