Solution-processed and high-performance organic solar cells using small molecules with a benzodithiophene unit.

TitleSolution-processed and high-performance organic solar cells using small molecules with a benzodithiophene unit.
Publication TypeJournal Article
Year of Publication2013
AuthorsZhou J, Zuo Y, Wan X, Long G, Zhang Q, Ni W, Liu Y, Li Z, He G, Li C, Kan B, Li M, Chen Y
JournalJournal of the American Chemical Society
Volume135
Issue23
Pagination8484-7
Date Published2013 Jun 12
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.

DOI10.1084/jem.20130212
Alternate JournalJ. Am. Chem. Soc.