Synthesis And Luminescence Properties Of Mn²⁺ And Rare Earth Ions Doped ZnS Nanocrystalline

Semiconductor nanomaterials have many excellent properties, such as quantum size effect, surface effect and nonlinear optical phenomenon is becoming a hot spot of research. ZnS is a kind of important II-VI administered compound semiconductor materials，Meanwhile it is also a good body material and its forbidden band width is3.6～3.8eV. Because it has a good light transmission performance, in optical and optoelectronic devices, such as electroluminescent display device, ultraviolet detector, light-emitting diodes, solar cells and some fluorescent biomarkers material has wide application prospects. In recent years, people begin to pay attention to the preparation and study of doped nano ZnS in order to improve its performance and get more extensive application. Er-doped, Yb-doped and Er-Yb-doped ZnS nanocrystallines were synthesized byhydrothermal method. The phase, appearance and crystal structure, size and luminescent properties of the nanocrystals were characterized by X-ray diffraction(XRD), transmission electron microscopy(TEM) and fluorescence photometer. This study concludes as follows, the well-crystallized doped ZnS nanocrystallines were synthesized by hydrothermal method. The results show that ZnS nanocrystals are5～10nm of particle size and have a cubic zinc blende crystal structure and Showed sphericity with little agglomerate phenomena. The emergence of a strong Mn ion luminescence characteristic peak is centered at awavelength of580nanometers when Mn ions doped ZnS nanocrystalline.When the Mn ions doping amount was7%, the emission peak intensity was gained at peakageing. The concentration quenching phenomenon occurred when doping quantity increased to10%. When Er doped molar concentration was6%, the stabilizer add mercaptoaceticacid mole fraction was2%, the synthesis temperature was120℃, we could have got Er ion doped ZnS nanometer material with favorable fluorescence properties. The emission peak of Er ion doped ZnS nanometer material with two fluorescent peaks and the photoluminescence peak is compound transition between the vacancy.When Er-Yb ions doped ZnS nanocrystalline, As Yb ions concentration is1%, ZnS: Er-Yb nanocrystals have the strongest performance with Er ions doping amount of3%. As Er ions concentration is1%, ZnS:Er-Yb nanocrystals have the strongest performance with Yb ions doping amount of3%. The efficiency of energy transfer increases with interaction between between Er-Yb ions, The luminous intensity achieves the maximum.