硫化锌掺锰量子点的制备与光谱性能分析  

Preparation and Characteristics of Luminescence Spectroscopy of ZnS∶Mn Quantum Dots

作　　者：韩旭[1] 李岚[1] 张晓松[1] 安海萍[1] 董冬青[1] 

机构地区：[1]天津理工大学材料物理研究所,天津300384

出　　处：《稀有金属》2007年第z1期40-44,共5页Chinese Journal of Rare Metals

基　　金：天津市科技创新能力与环境建设平台项目;天津市自然科学基金以及天津市教委基金资助;天津理工学院科技发展基金资助项目(Lg04032)

摘　　要：首次应用低温水相合成方法制备了良好的ZnS∶Mn2+量子点材料样品。经过XRD和TEM检测晶粒大小约4 nm。使用323 nm波长激发在585 nm处有很强的橙红色发射。荧光光谱分析总结出Mn2+离子掺杂浓度的优化值为4%。通过能级分析认为ZnS∶Mn2+纳米微晶的橙红色为能级Mn2+的4T1-6A1之间的能级跃迁。重点考察了ZnS∶Mn2+量子点发光强度随时间变化现象,对纳米晶粒表面态氧钝化机制进行了分析。We synthesized ZnS∶Mn2+ quantum dots by aqueous precipitation at low temperature.The size of crystal is around 4 nm by XRD-Sherrer formula and TEM observation.The strong orange emission at 585 nm excited by 323 nm was also examined.We concluded the optimum concentration of Mn2+ is 4% based on the variation of spectra of ZnS∶Mn2+ quantum dots.In the orange-emitting from ZnS∶Mn2+ quantum dots is attributed to the transition of energy level of Mn2+ between 4T1-6A1.Particularly,the mechanisms of time dependence of the luminescence intensity of ZnS∶Mn2+ quantum dots was discussed.The time dependence evaluation of luminescence intensity is resulted from the passivation on the surface of nano-crystal.

关 键 词：量子点 水相法 ZnS:Mn2+ 能级分析 时间因素 

分 类 号：TN304.2+2[电子电信—物理电子学]