EFFECT OF MN ON PHOTOLUMINESCENCE OF ZNS SYNTHESIZED BY MICRO-EMULSION METHOD

Abstract

Photoluminescence property of ZnS nanoparticles could be improved by doping other components, such as manganese. Mn-doped ZnS nanoparticles is one of promising candidates for application in novel devices, such as solar cell and solar concentrator. An aim of this research is set to synthesize Mn-doped ZnS nanoparticles via micro-emulsion method because of its advantage in controlling particle size of resultant nanoparticles via the molar ratio of water to surfactant (W). It is well recognized that nominal particle size and Mn concentration of Mn-doped ZnS nanoparticles affect photoluminescence property. The synthesized Mn-doped ZnS nanoparticles were characterized by X-ray diffractometer, transmission electron microscopy (TEM), field emission scanning electron microscopy (FE-SEM) and spectrofluorometer. For analyzed results, the primary particle size of Mn-doped ZnS nanoparticles increases when the molar ratio of water to surfactant increases because of effect of reversed micelle size. In addition, emission intensity from Mn and ZnS increases when primary particle size deceases. For various Mn concentrations, the relative emission intensity from Mn to emission intensity from ZnS increases when Mn concentration increases.