Solution-Processed and High-Performance Organic Solar Cells Using Small Molecules with a Benzodithiophene Unit
Journal of the American Chemical Society2013Vol. 135(23), pp. 8484–8487
Citations Over TimeTop 1% of 2013 papers
Jiaoyan Zhou, Yi Zuo, Xiangjian Wan, Guankui Long, Qian Zhang, Wang Ni, Yongsheng Liu, Zhi Li, Guangrui He, Chenxi Li, Bin Kan, Miaomiao Li, Yongsheng Chen
Abstract
Three small molecules named DR3TBDTT, DR3TBDTT-HD, and DR3TBD2T with a benzo[1,2-b:4,5-b']dithiophene (BDT) unit as the central building block have been designed and synthesized for solution-processed bulk-heterojunction solar cells. Power conversion efficiencies (PCEs) of 8.12% (certified 7.61%) and 8.02% under AM 1.5G irradiation (100 mW cm(-2)) have been achieved for DR3TBDTT- and DR3TBDT2T-based organic photovoltaic devices (OPVs) with PC71BM as the acceptor, respectively. The better PCEs were achieved by improving the short-circuit current density without sacrificing the high open-circuit voltage and fill factor through the strategy of incorporating the advantages of both conventional small molecules and polymers for OPVs.
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