期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 116, 期 22, 页码 12258-12264出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp300437y
关键词
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资金
- National Science Foundation of China (NSFC) [50672089, 51172218]
- Program for New Century Excellent Talents in University [NCET-08-0511]
- Promotive Research Fund for Young and Middle-Aged Scientists of Shandong Province [BS2010CL049]
- Ocean University of China
- Ministry of Education
A new two-step method is reported to synthesize water-soluble ZnSe:Mn/ZnS core/shell doped quantum dots (d-dots) with pure dopant emission, high photoluminescence (PL) efficiency, and excellent stablility. The optical properties and structure of the obtained ZnSe:Mn/ZnS core/shell d-dots were characterized by UV-vis spectroscopy, PL spectra, X-ray diffraction (XRD) and transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS) in detail. The influences of experimental variables, including the ZnS shell thickness and the Mn doped concentration on the optical properties of the ZnSe:Mn/ZnS d-dots, have been systematically investigated. Finally, the stability against UV irradiation and chemical oxidation of these highly luminescent d-dots were studied, and the results showed that the ZnSe:Mn/ZnS core/shell d-dots were photostable under the intense UV irradiation for 5 h, and possessed better chemical stability than CdSe q-dots, showing their potential applications in biological labeling and light emitting devices.
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