期刊
MATERIALS RESEARCH BULLETIN
卷 112, 期 -, 页码 142-146出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2018.12.004
关键词
Perovskite quantum dots; Rb+ doping; Improved; Photoluminescence quantum yields
资金
- Fundamental Research Funds for the Central Universities in Minzu University of China
- National Natural Science Foundation of China [11504131, 61775245, 11674126]
All-inorganic perovskite quantum dots have wide application prospects in the fields of lighting and display. However, the photoluminescence quantum yields of violet-blue emission for the CsPbCl3 quantum dots is still low. In this work, the Rb+ ions were successfully incorporated into the lattice of CsPbCl3 quantum dots with partially substituting the sites of Cs+ ions by the modified hot injection method. It was interesting to observe that the photoluminescence quantum yields of CsPbCl3 quantum dots was improved from 5.7% to 13% through the optimization of Rb+ doping concentration. The absorption and emission peaks of CsPbCl3 quantum dots shifted to blue, originating from lattice substitution of Cs+ with R-b+. Further investigation on the photoluminescence dynamics of the quantum dots revealed that the enhanced photoluminescence quantum yields resulted from the reduced defects in CsPbCl3:Rb quantum dots. This work offers a new approach to improve the optical performance of perovskite quantum dots.
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