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Enhanced photocurrent-voltage characteristics of WO3/Fe2O3nano-electrodes.
- Source :
-
Journal of Physics D: Applied Physics . Feb2007, Vol. 40 Issue 4, p1091-1096. 6p. - Publication Year :
- 2007
-
Abstract
- N-type semiconductor thin films of WO3, Fe2O3and the composite structure of WO3/Fe2O3were prepared on FTO (SnO2?:?F on glass) substrates by the sol-gel method. Their structures and optical properties were characterized by XRD, SEM and UV-Vis spectrometry. Their photoelectrochemical properties were also investigated in a three-electrode cell system. The results showed that the photocurrent of the WO3/Fe2O3film was higher than that of WO3or Fe2O3alone, particularly under visible light illumination (? > 440?nm). In this case there was almost no photocurrent in the WO3film. A reasonable explanation was that the photo-generated electrons could transfer more easily in WO3/Fe2O3than in WO3or Fe2O3alone due to their special conduction band structures. Therefore, the interface between WO3and Fe2O3played an important role in improving the conversion efficiency. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ELECTRODES
*ELECTRIC resistors
*CATHODE rays
*ELECTRIC conductivity
Subjects
Details
- Language :
- English
- ISSN :
- 00223727
- Volume :
- 40
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Physics D: Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 23931040
- Full Text :
- https://doi.org/10.1088/0022-3727/40/4/027