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The effect size of CdS Quantum Dots (QDs) on thermal and
photovoltaic parameters is investigated. CdS QDs were adsorbed onto TiO2
electrodes using successive ionic layer adsorption and reaction (SILAR) to act as
sensitizers of quantum dots solar cells (QDSSCs). The CdS QDs sizes are
estimated using optical absorption spectra and application of effective mass
approximation model (EMA) as well as high resolution transmission microscopes
(HRTEM). The ratio of TiO2/CdS was confirmed by energy dispersive X-ray
spectroscopy (EDX). Thermal parameters (thermal diffusivity α, thermal effusivity
e and thermal conductivity k are measured by using Photoacoustic (PA)
Technique. The photovoltaic parameters (open circuit voltage Voc, short circuit
current density Jsc, fill factor FF and efficiency η) of the assembled CdS QDs
sensitized solar cells (QDSSCs) were determined under a solar illumination of 100
mW/cm2 (AM 1.5 conditions. Our results show that both the effective thermal
conductivity keff and efficiency η of CdS QDs deposited on TiO2 increase as the
size of CdS QDs is increased.
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