Eur. Phys. J. Appl. Phys.
Volume 69, Number 2, February 2015
|Number of page(s)||9|
|Section||Nanomaterials and Nanotechnologies|
|Published online||25 February 2015|
Fabrication of dye sensitized solar cells with different photoanode compositions using hydrothermally grown and P25 TiO2 nanocrystals
Physics Department, Faculty of Science, Arak University, 38156 Arak, Iran
2 Chemical Engineering Department, Faculty of Engineering, Arak University, 38156 Arak, Iran
a email: email@example.com
Revised: 14 December 2014
Accepted: 13 January 2015
Published online: 25 February 2015
In this research P25 TiO2 nanoparticles (NPs) and hydrothermally grown TiO2 nanocrystals (NCs) were used in the photoanode of the dye sensitized solar cells. The dominant size of hydrothermally grown TiO2 NCs was about 20 nm. Different photoanode compositions including various weight percents of different NCs were prepared. The photoelectrodes demonstrated a light scattering which was strongly dependent on the weight percent of P25 TiO2 NPs. According to the results, when the photoanode was dominantly composed of hydrothermally grown TiO2 NCs, the dye sensitized solar cells represented acceptable efficiencies. For the weight percent ratios of 70/30 and 30/70 for hydrothermally grown to P25 TiO2 NPs the efficiency was considerably decreased. This was specially observed for the thicker photoelectrodes. Nevertheless, when the photoanode was composed of equal weight percents of different NCs (50/50), the maximum efficiency of 7.1% was achieved. This was addressed due to the optimum situation of light scattering, dye adsorption and minimum of the tension in photoanode layer.
© EDP Sciences, 2015
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