Graphene nanoplatelets outperforming platinum as the electrocatalyst in co-bipyridine-mediated dye-sensitized solar cells.
Nano Lett
; 11(12): 5501-6, 2011 Dec 14.
Article
em En
| MEDLINE
| ID: mdl-22103554
ABSTRACT
Graphene nanoplatelets (GNP) in the form of thin semitransparent films on F-doped SnO2 (FTO) exhibit high electrocatalytic activity for the Co(bpy)3(3+/2+) redox couple in acetonitrile electrolyte solution. The GNP film is superior to the traditional electrocatalyst, that is, platinum, both in charge-transfer resistance (exchange current) and in electrochemical stability under prolonged potential cycling. The good electrochemical performance of GNP is readily applicable for dye-sensitized solar cells with Y123-sensitized TiO2 photoanodes and Co(bpy)3(3+/2+) as the redox shuttle. The dye-sensitized solar cell with GNP cathode is superior to that with the Pt-FTO cathode particularly in fill factor and in power conversion efficiency at higher illumination intensity.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Fontes de Energia Elétrica
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2,2'-Dipiridil
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Nanoestruturas
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Corantes
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Grafite
Idioma:
En
Ano de publicação:
2011
Tipo de documento:
Article