期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 683, 期 -, 页码 43-46出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2012.07.032
关键词
Graphene; Dye solar cells; Impedance
资金
- Ministerio de Economia y Competitividad of Spain [Consolider HOPE CSD2007-00007, MAT2010-19827]
- GeneralitatValenciana [PROMETEO/2009/058]
- GeneralitatValenciana (Institute of Nanotechnologies for Clean Energies) [ISIC/2012/008, 5511RT0416]
Photovoltaic performance of dye-sensitized solar cell (DSC) devices based on a new titania-graphene paste has been investigated using Impedance Spectroscopy (IS) technique. The results provide key information about device performance, clarifying that photocurrent increment is not related to lower charge transfer resistance, neither with a downshift of the Fermi level of the graphene titania semiconductor. The DSC devices constructed using titania-graphene paste and graphene thin films reach higher photocurrent and therefore higher efficiency than devices made with a commercial paste due to extra photocurrent generation, because the titania-graphene paste presents higher light harvesting in the visible region of the solar spectra combined with large scatter effect than the commercial titania paste. (C) 2012 Elsevier B.V. All rights reserved.
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