| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1608966 | Journal of Alloys and Compounds | 2015 | 7 Pages |
Abstract
The ZnSe quantum dots (QDs) were synthesized in an aqueous system by introducing excess Na+ ions, which were characterized by Photoluminescence (PL), PL decay curves, UV-Vis absorption spectrum (ABs), X-ray diffraction (XRD) and high resolution transmission electron microscopy (HRTEM). The results indicate that the particle size of ZnSe QDs were about 4Â nm when Na+ ions were present in excess, which was bigger than that of ZnSe QDs (about 2Â nm) synthesized in the solution without Na+ ions. An unexpected emission peak around 590Â nm was observed when the concentration of Na+ ions was high enough in the reaction solution. This emission peak could be attributed to the selenium vacancies (SVs).
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Bitao Liu, Haiyan Yu, Ya Wang, Lingling Peng, Tao Han, Liangliang Tian, Litao Yan,