The performance of alloyed CdS 0.33 Se 067 quantum dots sensitized solar cells (QDSSCs) is studied.Fluorine doped Tin Oxide (FTO) substrates were coated with 20 nm-diameter TiO 2 nanoparticles (NPs).Presynthesized CdS 0.33 Se 067 quantum dots (QDs) of radius 3.1 nm, were deposited onto TiO 2 nanoparticles (NPs) using direct adsorption (DA) method, by dipping for different times at ambient conditio...