期刊
CHEMICAL COMMUNICATIONS
卷 55, 期 47, 页码 6708-6710出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cc02904d
关键词
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资金
- National Key Research and Development Program of China [2017YFA0206600]
- Key Research Program of Frontier Sciences, Chinese Academy of Sciences [QYZDB-SSW-SLH033]
- National Natural Science Foundation of China (NSFC) [51673048, 21875052, 51773046, 21602040, 51873044]
For photovoltaic polymers with a D-pi-A backbone, there are a great deal of D and A units, but the choice of pi bridge is relatively limited and thiophene (T) is still the most effective one. Here, we utilize two D-p-A polymers, J52-FS with thiophene as the pi bridge and PE2 with thieno[3,2-b]thiophene (TT) as the pi bridge, to combine with a low band-gap non-fullenere Y6, respectively. The photovoltaic cells based on PE2: Y6 can realize a PCE of 13.50%, which is obviously higher than the 10.58% PCE of the J52-FS: Y6 analogue. Our work demonstrates that using TT as the pi-bridge is a simple and promising approach to construct efficient photovoltaic polymers.
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