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Optically Transparent Cathode for Dye-Sensitized Solar Cells Based on Graphene Nanoplatelets
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SYSNO ASEP 0358445 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Optically Transparent Cathode for Dye-Sensitized Solar Cells Based on Graphene Nanoplatelets Author(s) Kavan, Ladislav (UFCH-W) RID, ORCID
Yum, J. H. (CH)
Graetzel, M. (CH)Source Title ACS Nano. - : American Chemical Society - ISSN 1936-0851
Roč. 5, č. 1 (2011), s. 165-172Number of pages 8 s. Language eng - English Country US - United States Keywords graphene ; dye sensitized solar cells ; electrochemical impendance 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 000286487300022 DOI 10.1021/nn102353h Annotation Commercial graphene nanoplatelets in the form of optically transparent thin films on F-doped SnO2 (FTO) exhibited high electrocatalytic activity toward I3−/I− redox couple, particularly in electrolyte based on ionic liquid (Z952). The charge-transfer resistance, RCT, was smaller by a factor of 5−6 in ionic liquid, compared to values in traditional electrolyte based on methoxypropionitrile solution (Z946). Optical spectra and electrochemical impedance confirm that the film’s absorbance scales linearly with RCT−1. Electrocatalytic properties of graphene nanoplatelets for the I3−/I− redox reaction are proportional to the concentration of active sites (edge defects and oxidic groups), independent of the electrolyte medium. Dye-sensitized solar cell (DSC) was assembled with this material as a cathode. 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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