title: Solution-processed and high-performance organic solar cells using small molecules with a benzodithiophene unit.
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.
authors.affiliation: Key Laboratory for Functional Polymer Materials and Centre for Nanoscale Science and Technology, Institute of Polymer Chemistry, College of Chemistry, Nankai University, Tianjin 300071, China.
authors.forename: Jiaoyan
authors.initials: J
authors.lastname: Zhou
authors.forename: Yi
authors.initials: Y
authors.lastname: Zuo
authors.forename: Xiangjian
authors.initials: X
authors.lastname: Wan
authors.forename: Guankui
authors.initials: G
authors.lastname: Long
authors.forename: Qian
authors.initials: Q
authors.lastname: Zhang
authors.forename: Wang
authors.initials: W
authors.lastname: Ni
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Liu
authors.forename: Zhi
authors.initials: Z
authors.lastname: Li
authors.forename: Guangrui
authors.initials: G
authors.lastname: He
authors.forename: Chenxi
authors.initials: C
authors.lastname: Li
authors.forename: Bin
authors.initials: B
authors.lastname: Kan
authors.forename: Miaomiao
authors.initials: M
authors.lastname: Li
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Chen
mesh_terms: D011211:Electric Power Supplies; D006575:Heterocyclic Compounds, 3-Ring / Q000138:chemical synthesis / Q000737:chemistry*; D012993:Solar Energy; D012996:Solutions; D013876:Thiophenes / Q000138:chemical synthesis / Q000737:chemistry*
chemical_list: D006575:Heterocyclic Compounds, 3-Ring; D012996:Solutions; D013876:Thiophenes