Journal
ADVANCED MATERIALS
Volume 23, Issue 45, Pages 5359-+Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201103177
Keywords
self-assembly; pyrene; organic photovoltaics; donor-acceptor small molecules
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Funding
- Director, Office of Science, Office of Basic Energy Sciences, Materials Sciences and Engineering Division, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Camille and Henry Dreyfus Postdoctoral Program
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Efficient organic photovoltaic (OPV) materials are constructed by attaching completely planar, symmetric end-groups to donor-acceptor electroactive small molecules. Appending C2-pyrene as the small molecule end-group to a diketopyrrolopyrrole core leads to materials with a tight, aligned crystal packing and favorable morphology dictated by pi-pi interactions, resulting in high power conversion efficiencies and high fill factors. The use of end-groups to direct molecular self-assembly is an effective strategy for designing high-performance small molecule OPV devices.
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