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Novel highly active Pt/graphene catalyst for cathodes of Cu(II/I)-mediated dye-sensitized solar cells
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SYSNO ASEP 0481279 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Novel highly active Pt/graphene catalyst for cathodes of Cu(II/I)-mediated dye-sensitized solar cells Tvůrce(i) Kavan, Ladislav (UFCH-W) RID, ORCID
Krýsová, Hana (UFCH-W) RID, ORCID
Janda, Pavel (UFCH-W) RID, ORCID
Tarábková, Hana (UFCH-W) RID, ORCID
Saygili, Y. (CH)
Freitag, M. (CH)
Zakeeruddin, S. M. (CH)
Hagfeldt, A. (CH)
Grätzel, M. (CH)Zdroj.dok. Electrochimica acta. - : Elsevier - ISSN 0013-4686
Roč. 251, OCT 2017 (2017), s. 167-175Poč.str. 9 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova graphene ; platinum ; cathode catalyst ; dye sensitized solar cell ; Cu-complexes Vědní obor RIV CG - Elektrochemie Obor OECD Physical chemistry CEP GA13-07724S GA ČR - Grantová agentura ČR Institucionální podpora UFCH-W - RVO:61388955 UT WOS 000413004200018 EID SCOPUS 85028297618 DOI 10.1016/j.electacta.2017.08.080 Anotace Novel highly active, optically-transparent electrode catalyst containing Pt, PtOx, graphene oxide and stacked graphene platelet nanofibers is developed for a cathode of Cu(II/I)-mediated dye-sensitized solar cells. The catalyst layer is deposited on a FTO substrate, which thus becomes smoother than the parent FTO, but the button-like Pt/PtOx nanoparticles are still distinguishable. The found electrocatalytic activity for the Cu(tmby)(2)(2+/+) redox couple (tmby is 4,4', 6,6'-tetramethyl-2,2'-bipyridine) is outperforming that of alternative catalysts, such as PEDOT or platinum. Exchange current densities exceeding 20 mA/cm(2) are provided exclusively by our novel catalyst. The synergic boosting of electrocatalytic activity is seen, if we normalize it to the catalytic performance of individual components, i.e. Pt and graphene nanofibers. The outstanding properties of our cathode are reflected by the performance of the corresponding solar cells using the Y123-sensitized titania photoanode. Champion solar-conversion efficiency (11.3% at 0.1 sun) together with a fill factor of 0.783 compare favorably to all other so far reported best values for this kind of solar cells and the given experimental conditions. (C) 2017 Elsevier Ltd. All rights reserved. Pracoviště Ústav fyzikální chemie J.Heyrovského Kontakt Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Rok sběru 2018
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