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Graphene Nanoplatelet Cathode for Co(III)/(II) Mediated Dye-Sensitized Solar Cells
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SYSNO ASEP 0367630 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Graphene Nanoplatelet Cathode for Co(III)/(II) Mediated Dye-Sensitized Solar Cells Author(s) Kavan, Ladislav (UFCH-W) RID, ORCID
Yum, J. H. (CH)
Nazeeruddin, M. K. (CH)
Grätzel, M. (CH)Source Title ACS Nano. - : American Chemical Society - ISSN 1936-0851
Roč. 5, č. 11 (2011), s. 9171-9178Number of pages 8 s. Language eng - English Country US - United States Keywords graphene ; dye sensitized solar cell ; cobalt redox shuttle Subject RIV CG - Electrochemistry R&D Projects LC510 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) IAA400400804 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) KAN200100801 GA AV ČR - Academy of Sciences of the Czech Republic (AV ČR) CEZ AV0Z40400503 - UFCH-W (2005-2011) UT WOS 000297143300079 DOI 10.1021/nn203416d Annotation Graphene nanoplatelets (GNP) in the form of thin semitransparent film on F-doped SnO2 (FTO) exhibit high electrocatalytic activity for Co(L)2; where L is 6-(1H-pyrazol-1-yl)-2,2′-bipyridine. The exchange current densities for the Co2+/3+(L)2 redox reaction scaled linearly with the GNP film’s optical absorbance, and they were by 1–2 orders of magnitude larger than those for the I3–/I– couple on the same electrode. The electrocatalytic activity of GNP films with optical transmission below 88% is outperforming the activity of platinized FTO for the Co2+/3+(L)2 redox reaction. Dye-sensitized solar cells with Y123 dye adsorbed on TiO2 photoanode achieved energy conversion efficiencies between 8 and 10% for both GNP and Pt-based cathodes. However, the cell with GNP cathode is superior to that with Pt-FTO cathode particularly in fill factors and in the efficiency at higher illumination intensities. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2012
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