Nanomeghyas

Nanomeghyas

Investigation About the Effect of Hydrothermally TiO2 Nanocrystal layer Diameter on Performance of CdS Quantum Dot Sensitized Solar Cell

Authors
F. Ahangar Farahani
M. Marandi
Abstract
In this research two different diameter of TiO2 nanocrystal layer were employed in quantum dot sensitized solar cells. Hydrothermally TiO2 nanoparticles in different diameters 4±0.5 and 10±0.5 µm were deposited on FTO glass substrate as the photoanode scaffold. For sensitizing the photoanodes, CdS QDs were grown on the surface of photoanode through the Successive Ionic Layer Adsorption and Reaction SILAR method. The results demonstrated that the maximum efficiency was achieved for the cell with a photoanode made of 6 cycles of CdS deposition on 10 µm layer of TiO2 nanoparticles. The photovoltaic parameters of this cell were measured as Jsc of 6.93 mA/cm2, Voc of 610 mv and energy conversion efficiency of 1.76. Also, according to the results of the EIS analysis, for this solar cell, the Cμ value increased to 240 µF, indicating an increase in the charge load in the photoanode and an increase in electron transfer. The lifetime of the load carriers in this cell was 9 ms, too.
Keywords
TiO2 nanoparticles
hydrothermal method
solar cell
CdS quantum dot
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  • Receive Date 30 October 2020