期刊
NANO LETTERS
卷 12, 期 1, 页码 133-140出版社
AMER CHEMICAL SOC
DOI: 10.1021/nl2029859
关键词
Graphene; CVD; organic solar cell; metal oxide; oxygen plasma
类别
资金
- Eni S.p.A. under the Eni-MIT Alliance Solar Frontiers Center
- Fannie and John Hertz Foundation
- National Science Foundation
In this work, organic photovoltaics (OPV) with graphene electrodes are constructed where the effect of graphene morphology, hole transporting layers (HTL), and counter electrodes are presented. Instead of the conventional poly(3,4-ethylenedioxythiophene)/poly(styrenesulfonate) PEDOT:PSS HTL, an alternative transition metal oxide HTL (molybdenum oxide (MoO3)) is investigated to address the issue of surface immiscibility between graphene and PEDOT:PSS. Graphene films considered here are synthesized via low-pressure chemical vapor deposition (LPCVD) using a copper catalyst and experimental issues concerning the transfer of synthesized graphene onto the substrates of OPV are discussed. The morphology of the graphene electrode and HTL wettability on the graphene surface are shown to play important roles in the successful integration of graphene films into the OPV devices. The effect of various cathodes on the device performance is also studied. These factors (i.e., suitable HTL, graphene surface morphology and residues, and the choice of wellmatching counter electrodes) will provide better understanding in utilizing graphene films as transparent conducting electrodes in future solar cell applications.
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