Adv Mater. 2012 May 2;24(17):2242-8. doi: 10.1002/adma.201103948. Epub 2012 Mar 26.

Bithiophene imide and benzodithiophene copolymers for efficient inverted polymer solar cells.

Zhou N, Guo X, Ortiz RP, Li S, Zhang S, Chang RP, Facchetti A, Marks TJ.

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Department of Materials Science and Engineering, the Argonne-Northwestern Solar Energy Research Center, Northwestern University, Evanston, Illinois 60208, USA.

Abstract

Bithiophene imide (BTI) and benzodithiophene (BDT) copolymers are synthesized for application in organic photovoltaic (OPV) cells. The electron deficiency of the BTI units leads to polymers with a low-lying HOMOs (∼-5.6 eV). Inverted solar cells are fabricated to investigate the OPV performance of the BTI-based polymers and achieve power conversion efficiencies up to 5.5%, with substantial V(oc)s above 0.9 V which are among the highest V(oc)s reported to date for polymer/PCBM solar cells. The results indicate that the BTI is a promising building block for constructing polymer donors for OPV applications.

PMID:: 22451379; [PubMed - indexed for MEDLINE]

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Bithiophene imide and benzodithiophene copolymers for efficient inverted polymer solar cells.
Adv Mater. 2012 May 2 ;24(17):2242-8. doi: 10.1002/adma.201103948. Epub 2012 Mar 26 .

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