Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5402332 | Journal of Luminescence | 2010 | 8 Pages |
Abstract
Zinc sulfide semiconductor nanocrystals doped Mn2+ have been synthesized via a solution-based method utilizing optimum dopant concentration (4%) and employing polyvinyl pyrrolidone (PVP) and sodium hexametapolyphosphate (SHMP) as capping agents. UV-vis absorbance spectra for all of the synthesized nanocrystals show an exitonic peak at around 310Â nm. The particle size and morphology were characterized by scanning electron microscopy (SEM), FT-IR, X-ray diffraction (XRD), transmission electron microscopy (TEM) and photoluminescence spectrum (PL). Diffraction data confirmed that the crystallite size is around 3-5Â nm. Room temperature photoluminescence (PL) spectrum for the bare ZnS sample shows a strong band at â¼445Â nm. The uncapped and capped(SHMP, PVP) ZnS:Mn2+ samples show a strong and broad band in the â¼580-585Â nm range.
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Authors
G. Murugadoss,