银锰共掺杂Zn-In-Se核壳量子点的发光性能  

Luminescence Properties of Ag and Mn Codoped Zn-In-Se Core-Shell Quantum Dots

作　　者：李孝斌 黎华 吴锐敏 刘凯 徐慢[1] 戴武斌 LI Xiaobin;LI Hua;WU Ruimin;LIU Kai;XU Man;DAI Wubin(School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China)

机构地区：[1]武汉工程大学材料科学与工程学院,湖北武汉430205

出　　处：《武汉工程大学学报》2023年第3期284-288,共5页Journal of Wuhan Institute of Technology

基　　金：湖北省自然科学基金青年项目(18S020);湖北省教育厅科学技术研究计划项目(18S069);武汉工程大学博士启动基金(16QD28);武汉工程大学第十二届研究生教育创新基金(CX2020140)。

摘　　要：为了得到一种高性能的白光发光二极管用荧光材料,采用热注入法合成了一种银锰共掺杂的核/壳量子点。利用X射线衍射、透射电子显微镜、紫外-可见分光光度计、荧光光谱仪对样品的微观形貌、结构以及发光性能进行了测试与表征。测试结果表明:成功制备了目标量子点,所得样品呈类球形,平均粒径为(10.7±0.5)nm;该量子点能被紫外光有效激发,发射峰位于510 nm与615 nm处;与未包覆ZnSe壳层的量子点相比,核/壳量子点的发光强度与稳定性得到显著提升,并且量子产率达到了68%。核/壳结构量子点在254 nm紫外光连续辐照24 h后以及温度达到475 K时仍分别保持初始亮度的82%与50%。该量子点的优异发光性能与稳定性表明其在照明领域具有良好的应用前景。To obtain a high-performance fluorescent material for white light emitting diodes,Ag and Mn codoped core-shell quantum dots were synthesized by a thermal injection method.X-ray diffraction,transmission electron microscopy,ultraviolet-visible spectroscopy and fluorescence spectroscopy were used to characterize the micromorphology,structure and luminescence performance of the samples.The results show that the target quantum dots are successfully prepared,and the obtained sample is spherical with an average particle size of(10.7±0.5)nm.The quantum dots can be effectively excited by ultraviolet light,and the emission peaks are located at 510 nm and 615 nm.Compared with the quantum dots without a shell,the luminous intensity and stability of the core-shell quantum dots are significantly improved,and the quantum yield reaches 68%.The core-shell quantum dots still maintain 82%and 50%of the initial brightness after 24 h of continuous irradiation with 254 nm ultraviolet light and at 475 K,respectively.The excellent luminescence performance and stability of the quantum dots indicate that they have good application prospects in the field of lighting.

关 键 词：白光发光二极管 银 锰 共掺杂 核/壳量子点 发光性能 

分 类 号：O482.31[理学—固体物理]