| 作者: | Yongxi Li,a Xiaodong Liu,b Fu-Peng Wu,a Yi Zhou,*b Zuo-Quan Jiang,*a Bo Song,b Yuxin Xia,c Zhi-Guo Zhang,d Feng Gao,*c Olle Inganäs,c Yongfang Libd 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. bLaboratory of Advanced Optoelectronic Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, P. R. China. cBiomolecular and Organic Electronics, IFM, Linköping University, Linköping 58183, Sweden. dBeijing National Laboratory for Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China. |
| 摘要: | A non-fullerene electron acceptor bearing a fused 10-heterocyclic ring (indacenodithiopheno-indacenodithiophene) with a narrow band gap (~1.5 eV) was designed and synthesized. It possesses excellent planarity and enhanced effective conjugation length compared to previously reported fused-ring electron acceptors. When this acceptor was paired with PTB7-Th and applied in polymer solar cells, a power conversion efficiency of 6.5% was achieved with a high open circuit voltage of 0.94 V. More significantly, an energy loss as low as 0.59 eV and an external quantum efficiency as high as 63% were obtained simultaneously. |