The present work deals with the synthesis and optical characterization of sensitizers CdS, CdSe quantum dots (QDs) and metal halide perovskite CH3NH3SnCl3, which were successfully fabricated by adopting solution chemistry route. Subsequent characterization studies were carried out on the synthesized samples using UV-Visible spectroscopy and photoluminescence spectroscopy. The optical band gaps were calculated as 2.75 eV (450 nm), 2.69 eV (460 nm) and 2.60 eV (476 nm) for CdS, CdSe QDs and CH3NH3SnCl3 respectively. The photoluminescence (PL) properties of the QDs nanocrystal represent a series of best sensitizers that are highly efficient for solar cell applications, highly pure in emission colour, stable and tunable by simply varying the size of the nanocrystals. The experimental results suggested that the existence of the PL bright point observed at 560nm, 540nm and 780nm for CdS, CdSe QDs and perovskite CH3NH3SnCl3 respectively.
