Bithiophene imide and benzodithiophene copolymers for efficient inverted polymer solar cells.
basic_science · Level V
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- Record sourced from PubMed, PMID 22451379.
- Also identified by DOI 10.1002/adma.201103948.
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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.
Medical subject headings
- Imides
- Polymers
- Solar Energy
- Thiophenes