中文摘要：

以巯基丙酸作为配体,在水溶液中合成了发光位置在495-583 nm可调的Au∶Zn Cd S合金量子点,研究了掺杂含量、Zn/Cd比和p H等对量子点光学性质的影响。对预提纯的Au∶Zn Cd S核量子点进行Zn S包覆,量子点表面的缺陷被有效去除,发光效率明显提高。利用X-射线粉末衍射、透射电子显微镜对其结构和形貌进行了表征。

英文摘要：

Au-doped ZnCdS alloyed quantum dots （QDs） with tunable emission in 495 - 583 nm were successfully synthesized by using mercaptopropanoic acid （MPA） as ligand in water. The effects of doping concentration, ratio of Zn/Cd and pH on the optical properties of as-prepared QDs were investigated. Furthermore, the emission efficiency of QDs can be enhanced through coating ZnS shell on the purified Au： ZnCdS QDs core to eliminate the surface defects of QDs. The crystal structure and shape of doped QDs were characterized by using XRD and TEM.