掺入Eu^(3+)中间层对ZnS:Mn^(2+)核壳量子点发光特性的影响  

Synthesis and Luminescence Properties of Eu^(3+) Intermediate Layer in ZnS: Mn^(2+) Core-shell Quantum Dots

作　　者：孟祥东[1,2] 李维岩 于兆亮[1,2] 曲晓慧[1] 胡悦[1] 李忠跃 

机构地区：[1]吉林师范大学功能材料物理与化学教育部重点实验室,吉林长春130103 [2]吉林大学无机合成与制备化学国家重点实验室,吉林长春130023

出　　处：《吉林师范大学学报（自然科学版）》2015年第3期15-18,共4页Journal of Jilin Normal University:Natural Science Edition

基　　金：国家自然科学基金项目(61275047);教育部科学技术研究项目(213009A);吉林省科技发展计划项目(20120344);中国博士后科学基金项目(2012M510868);吉林省教育厅科学技术研究项目(2014149)

摘　　要：掺入稀土元素有望实现半导体量子点的尺寸可调的光谱吸收与稀土离子窄的发射峰的有效利用.利用高温成核法合成出EuxZn1-xS:Mn(x=0、0.2、0.4、0.6、0.8、1)核壳量子点.X射线衍射结果表明,不同Eu3+掺入量的量子点样品为闪锌矿结构;X射线光电子能谱结果表明,在1120~1180 e V之间存在Eu3+的3d3/2和3d5/2峰.光致发光谱和时间衰减曲线表明,随着Eu3+掺入量增加,发光强度和荧光衰减寿命呈现出先增强后减小的趋势,Eu3+和Mn2+之间存在偶极子—偶极子相互作用的无辐射能量传递过程.Doping quantum dots （ QDs ） with lanthanide ions is promising to combine the efficient sharp line emission of lanthanides with the strong and size-tunable absorption of QDs.The EuxZn1-xS：Mn（x=0、0.2、0.4、0 .6、0 .8、1 ） were synthesized by nucleation-doping strategy .The structures and properties of those materials were characterized by X-ray diffraction （ XRD ） and photoluminescent spectroscopy techniques .The XRD patterns revealed that europium doped ZnS：Mn QDs belong to zinc-blende structure .The result of X-ray photoelectron spectroscopy showsed that energy level position of 3d3/2 and 3d5/2 of Eu3＋ions locate in between 1 120 eV and 1 180 eV.With the rising of incorporation of Eu 3＋ions,photoluminescence and time decay curves demonstrated that luminescence intensity and fluorescence lifetime decay first increase then decrease .The energy transfer process is nonradiative and the interaction between Mn 2 ＋and Eu3 ＋centers is dipole-dipole interaction.

关 键 词：量子点 稀土离子 能量传递 

分 类 号：TN304[电子电信—物理电子学]