Abstract
Un-doped and Ag-doped CdS quantum dots (QDs) were deposited on spin coated TiO2 photoanode material by Successive Ionic Layer Adsorption and Reaction (SILAR) method. Systematic investigations were carried out in the deposited un-doped and Ag-doped CdS QDs using powder X-ray diffraction (PXRD), field emission scanning electron microscopy (FESEM) and UV–vis-NIR spectrum. Finally, the FTO/TiO2/un-doped CdS and FTO/TiO2/Ag-doped CdS QDs were successfully assembled to study the photovoltaic performance under standard one sun illumination of AM 1.5, 100mW/cm2. Photovoltaic parameters, such as short-circuit photocurrent density, open circuit voltage, fill factor and conversion efficiency were found to be 1.37mA/cm2, 0.72V, 61.5% and 0.61% respectively, for un-doped CdS. Ag-doped CdS QDs shows enhanced photovoltaic parameters such as short-circuit photocurrent density, open circuit voltage, fill factor and conversion efficiency which were 2.35mA cm2, 0.74V, 71.8% and 1.25% respectively.
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