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1. 中国科学院 研究生院
2. 中国科学院长春光学精密机械与物理研究所 激发态物理重点实验室
收稿:2009-05-08,
修回:1900-1-2,
网络首发:2009-12-30,
纸质出版:2009-12-30
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张庆彬, 曾庆辉, 郑金桔, 等. CdSe/ZnSe/ZnS多壳层结构量子点的制备与表征[J]. 发光学报, 2009,30(6):842-846.
ZHANG Qing-bin, ZENG Qing-hui, ZHENG Jin-ju, et al. Synthesis and Characterization of the CdSe/ZnSe/ZnS Multishell Quantum Dots[J]. Chinese Journal of Luminescence, 2009, 30(6): 842-846.
展示了一种简捷的多壳层量子点合成路线。在含有过量Se源的CdSe体系中直接注入Zn源
"一步法"合成了CdSe/ZnSe量子点;进一步以CdSe/ZnSe为"核"
表面外延生长ZnS壳层制备了核/壳/壳结构CdSe/ZnSe/ZnS量子点。相对于以往报道的多壳层结构量子点的制备方法
该方法通过减少壳层的生长步骤有效地简化了实验操作
缩短了实验周期
同时减少对原料的损耗。对量子点进行高温退火处理
能够大幅提高CdSe/ZnSe/ZnS量子点的发光量子产率。透射电镜、XRD以及光谱研究表明:所制备的量子点接近球形
核与壳层纳米晶均为闪锌矿结构
最终获得的CdSe/ZnSe/ZnS量子点的光致发光量子产率达到53%。为了实现量子点的表面生物功能化
通过巯基酸进行了表面配体交换修饰
使量子点表面具有水溶性的羧基功能团
并且能够维持较高的光致发光量子产率。
paper
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