期刊
JOURNAL OF LUMINESCENCE
卷 208, 期 -, 页码 145-149出版社
ELSEVIER
DOI: 10.1016/j.jlumin.2018.12.018
关键词
Quantum dot; ZnSe; Rare earth metal; Eu; Concentration quenching
类别
资金
- Korea Institute of Industrial Technology [PUR 18060]
Rare earth elements possessing unique 4f electrons have been investigated as excellent candidates for luminescent centers in doped II-VI nanocrystals, because of their abundant emission colors based on the 4-4f or 5d-4f transitions. In particular, ZnSe quantum dot (QDs) fabricated with the lanthanide Europium (Eu) can emit in both the visible and near-infrared region. In our work, the structural, morphological and optical properties were investigated the color-tunable ZnSe:Eu QDs. We focused on the ZnSe:Eu QDs synthesized by controlling Eu amount. According to the results, the optical property of ZnSe: Eu QDs showed that emission in the bluish to yellow-ocher range, and concentration quenching occurred upon increasing the Eu amount. The expected structure of the ZnSe:Eu QDs with Eu (Eu/Zn = 0.5, 1 and 1.5) was verified by XRD, TEM, XPS and gibbs free energy value using a HSC chemistry software.
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