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TiO2/silver/carbon nanotube nanocomposite working electrodes for high-performance dye-sensitized solar cells.
- Source :
-
Journal of Composite Materials . Jun2014, Vol. 48 Issue 14, p1679-1690. 12p. - Publication Year :
- 2014
-
Abstract
- In this study, we developed a new way to increase the efficiency of dye-sensitized solar cells by using TiO2/silver/carbon nanotube composites as the working electrode. Silver nanoparticles and multi-walled carbon nanotubes were mixed with TiO2 nanoparticles and used as working electrodes in a dye-sensitized solar cell. The effect of the silver nanoparticles and multi-walled carbon nanotubes on the efficiency of the dye-sensitized solar cell was studied as function of their volume fractions using several microscopic and spectroscopic characterization techniques such as scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, ultra-violet-vis and electrochemical impedance spectroscopy. It was found that the silver nanoparticles could induce surface plasmonic phenomena, where the light absorption was enhanced in the ultra-violet wavelength range. Additionally, the carbon nanotubes could increase the electron mobility in the working electrode due to their high surface-to-volume ratio and superior electrical conductivity. The efficiency of the silver/carbon nanotube/TiO2 nanocomposite working electrode was compared with that of a conventional TiO2 working electrode under one-sun illumination (100 mWcm–2, AM 1.5 G). The TiO2/Ag/carbon nanotube nanocomposite working electrode had a two-fold higher efficiency (3.76%) than the conventional pure TiO2 working electrode (1.88%). [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00219983
- Volume :
- 48
- Issue :
- 14
- Database :
- Academic Search Index
- Journal :
- Journal of Composite Materials
- Publication Type :
- Academic Journal
- Accession number :
- 96390450
- Full Text :
- https://doi.org/10.1177/0021998313490215