Mn-doped ZnS (ZnS:Mn) nanoparticles were prepared via hydrothermal method, studied effects on photoluminescence that different proportions Mn ions on Zn1-xMnxS. The composition, morphology, microstructure and optical property of the sample were characterized by X-ray diffraction (XRD).The results showed that the Zn1-xMnxS (x = 0,0.01,0.03,0.05,0.07,0.10) nanoparticles were spherical hexagonal structure of nanocrystalline, uniform particle size between 15 ~ 20nm. At room temperature, using the UV excitation wavelength is 350nm stimulate Zn1-xMnxS nanoparticles. Blue light emission which is produced by transition between shallow donor level and manganese t2 level can be obtained. Luminous intensity with the increasing amount of manganese-doped increased decreased after the first.And emission peaks have a mobile with the change of manganese-doped content. The reason may be related to sulfur vacancies which influence shallow donor level of ZnS. The proportion of zinc-manganese has an impact on the amount of sulfur vacancies and level position.
