LAUSR

Abstract Un-doped and Ag-doped CdS quantum dots (QDs) were deposited on spin coated TiO 2 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/TiO 2 /un-doped CdS and FTO/TiO 2 /Ag-doped CdS QDs were successfully assembled to study the photovoltaic performance under standard one sun illumination of AM 1.5, 100 mW/cm 2 . Photovoltaic parameters, such as short-circuit photocurrent density, open circuit voltage, fill factor and conversion efficiency were found to be 1.37 mA/cm 2 , 0.72 V, 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 2.35 mA cm 2 , 0.74 V, 71.8% and 1.25% respectively.