Lead Sulfide (PbS) colloidal quantum dots (CQDs) have gained significant attention due to their unique optoelectronic properties and potential applications in various fields: photovoltaics, optoelectronics, and bioimaging. In this study, we report a synthesis and fabrication of PbS CQD shortwave infrared (SWIR) photodetectors using a solution processed method. The synthesis involves the controlled reaction between lead oxide and oleic acid in a high-temperature solvent, followed by the addition of a stabilizing ligand (Hexamethyldisilathiane) (TMS)₂S). Differences in reaction time, the optical absorbance, and size and morphology of the PbS CQDs were investigated. The resulting PbS CQDs were characterized using transmission electron microscopy (TEM), and UV-Vis spectroscopy. The TEM analysis revealed monodispersed PbS CQDs with an average diameter of ~8.8±0.1 nm and an average area of ~57.01 nm. The UV-Vis spectroscopy showed strong quantum confinement effects, with a red-shift in the absorption spectra as the reaction time is increased. Fabrication of the PbS SWIR photodetector was successful as indicated by an increase in the photocurrent compared to the dark current. The external quantum efficiency (EQE) showed a peak wavelength at 1500 nm which is within the SWIR range. The responsivity and detectivity also showed a similar peak at 1500 nm. The synthesis and fabrication of PbS QDs for SWIR photodetector, with controlled size and optical properties presented in this study provides a promising approach for optoelectronics. Further optimization and characterization of the synthesized PbS QDs, and PbS QD SWIR photodetectors will be carried out to explore their full potential.