论文部分内容阅读
以乙酸锌为锌源,以氯化钴为钴源,以硫代乙酰胺为硫源,以淀粉为分散剂,微波辅助合成了ZnS∶Co粉体,通过X射线衍射仪(XRD)、荧光分光光度计和激光粒度分析仪对其物相、光学性能和粒径大小进行了表征分析。研究了掺杂离子Co~(2+)浓度对样品结构和光学性能的影响。结果表明,样品具有闪锌矿立方相结构,Co~(2+)进入Zn S晶格内部;掺杂量为1%时,荧光强度最高;当Co~(2+)的浓度增加至2%时,发生了浓度淬灭现象。这是由于掺杂离子浓度增加,无辐射跃迁增加引起的。
ZnS: Co powders were synthesized with zinc acetate as the zinc source, cobalt chloride as the cobalt source, thioacetamide as the sulfur source and starch as the dispersant. The XRD, XRD, Spectrophotometer and laser particle size analyzer for its phase, optical properties and particle size were characterized analysis. The effects of the concentration of Co ~ (2+) ions on the structure and optical properties of the samples were investigated. The results show that the sample has the cubic phase of sphalerite and Co 2+ enters the interior of ZnS crystal lattice. When the doping amount is 1%, the fluorescence intensity is the highest. When the concentration of Co 2+ increases to 2% Concentration quench occurred. This is due to the increase of the doping ion concentration and the increase of the non-radiative transition.