| 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10 nm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. |
| 关键词: CdS/ZnO核壳结构 能带调节 荧光性能 |
| DOI： |
| 分类号: |
| 基金项目: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) |
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| Preparation and luminescent properties of CdS/ZnO core shell quantum dots |
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LIU Ping, SU Xiangming, LIU Jie, YU Xibin
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College of Life and Environmental Sciences,Shanghai Normal University
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| Abstract: |
| The ZnO,CdS,and CdS/ZnO quantum dots have been successfully prepared through a facial sol-gel method.After annealing 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 structure.Also,it was verified that the core-shell structure led to the change of the energy level structures. |
| Key words: CdS/ZnO core-shell structure luminescence quantum dot |
