Structural and optical investigation of Mn-doped ZnS nanocrystals

摘要

Using a solution-based chemical method, we have prepared ZnS nanocrystals doped with high concentration of Mn~(2+). The X-ray diffraction analysis confirmed a zinc blende structure. The average size was about 3 nm. Photoluminescence spectrum showed room temperature emission in the visible spectrum, which consisted of the defect-related emission and the ~4T_1-~6A_1 emission of Mn~(2+) ions. Compared with the undoped sample, the luminescence of the ZnS:Mn sample is enhanced by more than an order of magnitude, which indicated that the Mn~(2+) ions can efficiently boost the luminescence of ZnS nanocrystals.