Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 122, Issue 21, Pages 11305-11311Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.8b03013
Keywords
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Funding
- U.S. National Science Foundation [DMR-1263006]
- DOE via the ANSER Center, an Energy Frontier Research Center - the U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001059]
- NIST via the CHIMAD program
- National Science Foundation [DMR-1420709]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences
- DOE Office of Science [DE-AC02-06CH11357]
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The non-fullerene electron acceptor, TPB, exhibits a unique cross-like molecular geometry which helps it to stay preferentially at the interfaces between PTB7-Th and PC71BM, when it is used as the third component in ternary OPV cells. The four PDI units connected to TPB's core provide multiple contact points between PTB7-Th and PC71BM phases, thus facilitating interfacial charge extraction and improving the overall PCE to 10.6% from 9.8% after 10% TPB was added as the third component. This paper describes detailed experimental results and a model to explain these observations.
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