Journal
CARBON
Volume 84, Issue -, Pages 383-389Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2014.12.014
Keywords
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Funding
- NRF-RFBR Joint Research Program [NRF-2013K2A1A7076282]
- NRF [NRF-2014006994]
- Korean Brain Pool Program [131S-6-3-0538]
- National Research Foundation Postdoctoral Fellowship Program through the National Research Foundation of South Korea [2014-1142-01]
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Dry plasma reduction is an excellent approach for easily and uniformly immobilizing Pt, Au and bimetallic AuPt nanoparticles (NPs) on a graphene nanoplatelets (GC)-coated layer under atmospheric pressure at a low temperature and without using any toxic reductants. The NPs with an average size of about 2 nm were stably and uniformly hybridized on the surface of reduced graphene nanoplatelets (RGC) after co-reduction of metal precursor ions and GC to metal atoms and RGC, respectively. Quantum-dot-sensitized solar cells exploiting AuNP/RGC, PtNP/RGC and bimetallic AuPtNP/RGC counter electrodes (CEs) exhibited power conversion efficiencies of 2.7%, 3.0% and 4.5%, respectively. The efficiencies are comparable to that of device with a conventional Au-sputtered CE (3.6%). The effect is ascribed to high electrochemical catalytic activity and high electrical conductivity of developed nanohybrid materials. (C) 2014 Elsevier Ltd. All rights reserved.
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