Performance of Dye Sensitized Solar Cells fabricated from Obliquely DC Sputtered TiO2 Films

Citation:
Waita SM, Mwabora JM, Aduda BO, Niklasson GA, Lindquist E, Granqvist CG. "Performance of Dye Sensitized Solar Cells fabricated from Obliquely DC Sputtered TiO2 Films." Africa Jnl. of Science and Technology. 2006;7(2):125-139.

Abstract:

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.

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