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Published in:
01-10-2014
Fabrication and optical properties of ZnS:Mn2+ quantum dots/SiO2 nanocomposites
Published in: Journal of Materials Science: Materials in Electronics | Issue 10/2014
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Abstract
ZnS:Mn2+ quantum dots (QDs)/SiO2 nanocomposites were successfully synthesized by stöber method. The results showed that the Mn2+ ions were substitutionally incorporated into the ZnS host and the average size of the ZnS:Mn2+ (5 %) QDs was about 5.5 nm. The yellow–orange emission from the Mn2+
4T1–6A1 transition was observed in the photoluminescence spectra, the peak intensity increased as the Mn2+ doped ratio increased, and showed a maximum when the concentration of the Mn2+ ions kept at 3 %. As the hydrolysis time of tetraethyl orthosilicate increased, the intensity of the yellow–orange emission reached the highest value when t = 4 h for the ZnS:Mn2+ (5 %) QDs/SiO2 nanocomposites.