碲化锌修饰掺铜硒化锌量子点的合成  

Synthesis of ZnTe Modified Cu Ion Doped ZnSe Quantum Dots

作　　者：傅腾飞[1] 李冬梅[1] 汤子龙[1] 

机构地区：[1]上海大学材料科学与工程学院,上海200072

出　　处：《上海大学学报（自然科学版）》2012年第6期577-581,共5页Journal of Shanghai University:Natural Science Edition

摘　　要：以巯基丙酸(mercaptopropionic acid,MPA)作为稳定剂,在水相中合成Cu离子掺杂的ZnSe量子点(quantumdots,QDs),并以ZnTe修饰其表面(ZnSe:Cu/ZnTe QDs).采用X射线衍射(X-ray diffraction,XRD)、高分辨透视电子显微镜(high resolution transmission electronic microscopy,HRTEM)、紫外可见吸收光谱(ultraviolent-visiblespectroscopy,UV-VIS)和光致发光(photoluminescence,PL)荧光光度计对其结构、相貌和光学特性进行表征.结果表明,合成所得荧光量子点的大小为4～6 nm;当激发波长325 nm时,荧光发射峰约为510 nm;经160℃热处理后,荧光发射峰会红移至540 nm左右,初步说明ZnTe的修饰会改变ZnSe:Cu量子点荧光发射峰的位置.This paper studies synthesis of ZnSe quantum dots （QDs） doped with Cu ion in an aqueous solution by using 3-mercaptopropionic acid （MPA） as ligand, and then modified its surface by ZnTe （ZnSe：Cu/ZnTe）. The structure, morphology and optical properties of QDs are characterized with X-ray diffraction （XRD）, high resolution transmission electronic microscopy （HRTEM）, ultraviolent-visible spectroscopy （UV-VIS） and photoluminescence （PL） spectroscopy. The sizes of QDs obtained were 4 6 rim. Under an excitation wavelength of 325 nm, peaks of ZnSe： Cu/ZnTe at 510 nm were observed. Especially, the peaks moved to 540 nm after a heat processing at 160 C. The facts indicate that the fluorescence emission peak＇s positions of ZnSe： Cu QDs capped by ZnTe surface modification can be changed.

关 键 词：ZNSE CU 光致发光 表面修饰 热处理 

分 类 号：O614.241[理学—无机化学]