发光可调Au∶ZnCdS合金量子点的水相合成  

Aqueous Synthesis of Au-Doped Zn Cd S Alloyed Quantum Dots with Tunable Emission

作　　者：孙智国 沈亚云[1] 林香男 曾若生[1] 

机构地区：[1]贵州师范大学化学与材料科学学院,贵阳550000

出　　处：《化学通报》2015年第9期839-842,共4页Chemistry

基　　金：国家自然科学基金项目(21101038;21461006和51472053);贵州省国际科技合作计划项目(黔科合外G字[2014]7008号)资助

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。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.

关 键 词：水相合成法 掺杂 量子点 

分 类 号：TQ422[化学工程]