Effect of irradiation on the luminescence in ZnS:Mn2+ nanoparticles

Mn2+-doped ZnS nanoparticles were prepared in AOT micelles and the 4T1-6A1 emission at 580 nm of Mn2+ ions incorporated within the ZnS nanoparticles was obtained. The irradiation-induced luminescence enhancement effect was observed that not only the luminescence at 580 nm was largely enhanced, but also the shape and the position of the excitation band was changed after a 305 nm irradiation from a Xe lamp. Different from the work reported previously, the irradiation-induced luminescence enhancement effect was not persistent and the irradiation resulted in the size decreasing of the nanoparticles. The experiments preferred to the electrons filling model.