Study on the Luminescence Properties of ZnS:Mn2+ Particles by High Temperature Solid Phase Method

Abstract ZnS has attracted wide attention for its potential applications in optoelectronic fields, such as solid-state lighting, fluorescent probes, electroluminescent devices and field emission displays. In this work, Mn 2+ -doped ZnS with hexagonal structure were prepared by high temperature solid phase method using MnCO 3 as manganese source, and the effect of Mn 2+ doping on ZnS was studied. The results show that the particle shape of ZnS doped with Mn 2+ is hexagonal structure, Mn 2+ doping changes the position and intensity of ZnS absorption spectrum and photoluminescence band. The absorption peak at 340 nm progressively moves to the right as Mn 2+ doping rises, a new conspicuous absorption peak forms in the visible area, and the maximum photoluminescence intensity of ZnS:Mn 2+ steadily increases. However, when the Mn 2+ doping exceeds the ratio of 4 at.%, the photoluminescence intensity showed a decreasing trend. This indicates that the number of effective emission centers reaches the maximum when the doping concentration of Mn 2+ is the most suitable.