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Effect of Different Graphene Oxide Contents on Dye-Sensitized Solar Cells
- Source :
- IEEE Journal of Photovoltaics. 5:1106-1112
- Publication Year :
- 2015
- Publisher :
- Institute of Electrical and Electronics Engineers (IEEE), 2015.
-
Abstract
- Graphene/TiO2 composite films were deposited on fluorine-doped SnO2-coated conductive substrates by spin coating acting as photoelectrodes of dye-sensitized solar cells. The graphene/TiO2 composite films were characterized by scanning electronic microscopy, an X-ray diffractometer, a UV–visible spectrometer, and electrochemical impedance spectroscopy. Nyquist plots showed the decrease of impedance, in which electron transport rate was promoted. The photovoltaic properties showed that the incorporation of graphene could increase the short-circuit current density and photoelectric conversion efficiency. However, an excessive incorporation of graphene led to the enhancement of charge recombination and the reduction of photoelectric conversion efficiency. The graphene/TiO2 composite film with 1.5-mL graphene oxide solution obtained the optimal photoelectric conversion efficiency of 5.26%.
- Subjects :
- Spin coating
Materials science
Graphene
business.industry
Oxide
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Dielectric spectroscopy
law.invention
chemistry.chemical_compound
Dye-sensitized solar cell
chemistry
law
Optoelectronics
Electrical and Electronic Engineering
business
Graphene nanoribbons
Diffractometer
Graphene oxide paper
Subjects
Details
- ISSN :
- 21563403 and 21563381
- Volume :
- 5
- Database :
- OpenAIRE
- Journal :
- IEEE Journal of Photovoltaics
- Accession number :
- edsair.doi...........08f6d8fccddca6516379ecf8744f593e