Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 24, Issue 5, Pages 701-706Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201302477
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Funding
- Center for Interface Science: Solar-Electric Materials (CIS:SEM), an Energy Frontier Research Center - U.S. Department of Energy, Office of Basic Energy Sciences [DE-SC0001084]
- Office of Energy Efficiency and Renewable Energy (EERE) Postdoctoral Research Fellowship through the SunShot Solar Energy Technologies Program
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The electronic structure of a bi-layer hole extraction contact consisting of nickel oxide (NiOx) and molybdenum trioxide (MoO3) is determined via ultraviolet and X-ray photoemission spectroscopy. The bi-layer presents ideal energetics for the extraction of holes and suppression of carrier recombination at the interface. The application of the NiOx/MoO3 bi-layer as the anode of organic bulk heterojunction solar cells based on PCDTBT/PC71BM leads to improved device performance, which is explained by an intricate charge transfer process across the interface.
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