期刊
APPLIED PHYSICS LETTERS
卷 99, 期 8, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3632062
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资金
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001091]
Charge separation at organic donor/acceptor interfaces is a key step in the functioning of an organic photovoltaic cell, but experimental techniques that uniquely probe the interface on ultrafast time scales are absent. Here, we apply a technique sensitive to interfacial charge separation based on four-wave mixing to follow the transient electric field at the donor/acceptor interface. Examining the model system of copper phthalocyannine (CuPc) and fullerene (C-60) bilayers, we observe ultrafast electron transfer from photoexcited CuPc to C-60 on a 80 +/- 20 fs time scale. (C) 2011 American Institute of Physics. [doi:10.1063/1.3632062]
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