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

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Author(s): Peng Lingling | Wang Yuhua

Journal: Nanoscale Research Letters
ISSN 1931-7573

Volume: 5;
Issue: 5;
Start page: 839;
Date: 2010;
Original page

Keywords: ZnS | Nanoparticals | Coating | Template | Photoluminescence

ABSTRACT
Abstract Mn-doped ZnS nanocrystals based on low dopant concentrations (0–2%) and coated with a shell of Zn(OH)2 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 (3–5 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)2 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.

Tango Jona
Tangokurs Rapperswil-Jona

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