Nickel selenide nano particles has been successfully synthesized from the reaction of nickel acetate [(CH3COO)2 Ni.4H2O] with sodium selenite (Na2SeO3) in the presence of glycerol as capping agent and hydrazine hydrate (N2H4. H2O) as reductant at 90oC for 6.30 hours through simple hydrothermal method. Doped NiSe:Mn is synthesized by chemical co-precipitation method using NiCl2.6H2O, Na2SeO3, MnCl2.4H2O and polyvinyl pyrrolidone (PVP) which act as reductant and capping agent at room temperature. NiSe and doped NiSe:Mn were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-visible , infrared spectroscopy (IR) and photoluminescence (PL) spectra