CdS/ZnO核壳结构量子点的制备及其光学性能  

Preparation and luminescent properties of CdS/ZnO core shell quantum dots

作　　者：刘娉[1] 苏相铭 刘洁[1] 余锡宾[1] 

机构地区：[1]上海师范大学生命与环境科学学院,上海200234

出　　处：《上海师范大学学报（自然科学版）》2015年第5期479-484,共6页Journal of Shanghai Normal University(Natural Sciences)

基　　金：上海市自然科学基金(11ZR1426500);上海市教委科研创新项目(14ZZ127);上海师范大学大学生创新实验项目;上海师范大学校重点学科(DZL124)

摘　　要：通过溶胶-凝胶法制备出ZnO、CdS和CdS/ZnO核壳结构量子点的前驱体,在空气气氛下高温处理后得到壳厚度为10nm左右的CdS/ZnO核壳结构.CdS/ZnO核壳结构会导致紫外吸收边产生明显的红移.与ZnO和CdS相比,核壳结构使CdS/ZnO的激发、发射光谱都产生了明显变化,并且提高了发光强度.研究发现核壳结构会使ZnO和CdS原有的能级结构发生变化.The ZnO, CdS, and CdS/ZnO quantum dots have been successfully prepared through a facial sol-gel method. After an- nealing treatment,the CdS/ZnO core-shell structure with a ZnO shell of 10 nm was acquired. The CdS/ZnO core-shell structure resulted in the obvious red shift in the absorption band edge. Compared to those of ZnO and CdS, obvious changes were found in the excitation and emission spectra of CdS/ZnO and the luminescent intensity of CdS/ZnO increased due to the core-shell struc- ture. Also, it was verified that the core-shell structure led to the change of the energy level structures.

关 键 词：CdS/ZnO核壳结构 能带调节 荧光性能 

分 类 号：O614.33[理学—无机化学]