PERFORMANCE OF DYE SENSITIZED SOLAR CELLS FABRICATED FROM OBLIQUELY DC SPUTTERED TiO2 FILMS
Date
2006Author
Waita, SM
Mwabora, JM
Aduda, Bernard O
Niklasson, GA
Lindquist, Sten-Eric
Granqvist, Claes-Goran
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
- Nanocrystalline porous titanium oxide films of varying thickness have been deposited
in ambient by reactive DC magnetron sputtering at a fixed but high oblique angle of 60o, and then
converted to TiO2 by thermal annealing at 450 oC for 4 hours. X-ray diffraction analysis of the films
showed that they were predominantly of anatase phase, whereas the as-deposited films were
amorphous. Top–down scanning electron microscope images of the annealed films showed
cauliflower-like surfaces, and exhibited well-defined columns. Atomic force microscope images
revealed rough surfaces with larger nodules for thicker films. With the annealed films as the working
electrodes in a dye-sensitised solar cell, it was established that the photoelectric conversion efficiency
increased with the film thickness. The highest efficiency was ~ 3.3 % at an illumination intensity of
100 W/m2.
Citation
AJST, Vol. 7, No. 2: December, 2006Publisher
Department of Physics, University of Nairobi, Department of Engineering Sciences, Solid State Physics, The Angstrom Laboratory, Uppsala University,