Graphene-based nanohybrid materials as the counter electrode for highly efficient quantum-dot-sensitized solar cells
SCIE
SCOPUS
- Title
- Graphene-based nanohybrid materials as the counter electrode for highly efficient quantum-dot-sensitized solar cells
- Authors
- Dao, VD; Choi, Y; Yong, K; Larina, LL; Choi, HS
- Date Issued
- 2015-04
- Publisher
- PERGAMON-ELSEVIER SCIENCE LTD
- Abstract
- 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.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/26921
- DOI
- 10.1016/J.CARBON.2014.12.014
- ISSN
- 0008-6223
- Article Type
- Article
- Citation
- CARBON, vol. 84, page. 383 - 389, 2015-04
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