CdSeS合金量子点的非线性组分效应研究  

CdSeS Alloyed Quantum Dots and its Nonlinear Composition Effect

作　　者：万真[1] 付红红[1] 袁斌霞[1] 栾伟玲[1] 

机构地区：[1]华东理工大学机械与动力工程学院承压系统与安全教育部重点实验室,上海200237

出　　处：《航空材料学报》2011年第6期50-54,共5页Journal of Aeronautical Materials

基　　金：国家自然科学基金资助项目(51172072);中央高校基本科研业务费专项资金(WJ 0913001);教育部科学技术研究重点项目(109063)

摘　　要：利用毛细管微反应装置实现了三元合金CdSeS量子点的高效、可控合成,并考查了合成温度、前驱体浓度等对CdSeS量子点性能的影响。通过对前驱体浓度的调控,实现了荧光发射波长在520～629 nm范围连续可调的CdSeS量子点的合成,并验证了合金量子点的非线性组分效应;利用高分辨透射电镜(HRTEM)、X射线衍射(XRD)、电子能谱(EDS)对合成的CdSeS量子点进行了结构和形貌表征。通过ZnS壳层包裹CdSeS,制备了核壳结构量子点,提高了荧光量子产率。Alloyed quantum dots（QDs） own tunable absorption and photoluminescence（PL） properties via the variation of chemical composition.Capillary microfluidic reactor was utilized for the controlled synthesis of ternary CdSeS QDs in an accelerated manner.The experimental results show that the synthesis conditions including the synthetic temperature and the concentration of precursors play important role in the PL properties of CdSeS QDs,the PL wavelength ranged from 520 nm to 629 nm is continuously adjusted.Moreover,the nonlinear composition effect was proved.The successful formation of alloyed QDs was confirmed by transmission electron microscopy（TEM）,X-ray diffraction（XRD） and Energy-dispersive X-ray spectroscopy（EDS） study.Besides,CdSeS/ZnS core/shell QDs with excellent color purity were prepared aiming at the improvement of PL quantum yields.

关 键 词：CdSeS量子点 微反应 非线性效应 

分 类 号：TQ13[化学工程—无机化工]