Effects of the Template Composition and Coating on the Photoluminescence Properties of ZnS:Mn Nanoparticles

<p>Abstract</p> <p>Mn-doped ZnS nanocrystals based on low dopant concentrations (0&#8211;2%) and coated with a shell of Zn(OH)<sub>2</sub> have been prepared via soft template and precipitation reaction. The results indicate that the ZnS:Mn nanocrystal is cubic zinc...

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Bibliographic Details
Main Authors: Peng Lingling, Wang Yuhua
Format: Article
Language:English
Published: SpringerOpen 2010-01-01
Series:Nanoscale Research Letters
Subjects:
Online Access:http://dx.doi.org/10.1007/s11671-010-9572-7
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Summary:<p>Abstract</p> <p>Mn-doped ZnS nanocrystals based on low dopant concentrations (0&#8211;2%) and coated with a shell of Zn(OH)<sub>2</sub> have been prepared via soft template and precipitation reaction. The results indicate that the ZnS:Mn nanocrystal is cubic zinc blende structure and its diameter is 3.02 nm as demonstrated by XRD. Measured by TEM, the morphology of nanocrystals is a spherical shape, and their particle size (3&#8211;5 nm) is similar to that of XRD results. Photoluminescence spectra under ultraviolet region shows that the volume ratio of alcohol to water in the template has a great effect on the luminescence properties of ZnS:Mn particles. Compared with unpassivated ZnS:Mn nanocrystals, ZnS:Mn/Zn(OH)<sub>2</sub> core/shell nanocrystal exhibits much improved luminescence and higher absolute quantum efficiency. Meanwhile, we simply explore the formation mechanism of ZnS:Mn nanocrystals in alcohol and water system and analyze the reason why alcohol and water cluster structures can affect the luminescent properties of nanoparticle.</p>
ISSN:1931-7573
1556-276X