Journal
NANOSCALE
Volume 7, Issue 25, Pages 10936-10939Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5nr02657a
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Funding
- State of Washington through the University of Washington Clean Energy Institute
- Asian Office of Aerospace RD [FA2386-11-1-4072]
- Office of Naval Research [N00014-14-1-0170]
- U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0001087]
- DOE, Office of Science and Office of Basic Energy Sciences
- Boeing Foundation
- National Science Foundation [DGE-1256082]
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A blade-coating process was employed to fabricate bulk-heterojunction (BHJ) polymer solar cells based on a ladder-type polymer (PIDT-PhanQ) with low crystallinity. Compared to the devices processed by a conventional spin-coating method, an intriguing morphology with enhanced phase-separation and increased crystallinity was achieved. As a result, power conversion efficiency up to 7.25% could be achieved from the blade-coated PIDTPhanQ:PC71BM BHJ film, surpassing the original value obtained by spin-coating (6.29%). This improved photovoltaic performance is attributed to the improved charge carrier mobilities, which correlates well with the increased crystallinity and the organized network of the donor-acceptor phases that produce efficient charge-transporting pathways.
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