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Nanostructured zinc sulphide phosphors

Published online by Cambridge University Press:  10 February 2011

R. Vacassy ,
S. M. Scholz ,
J. Dutta ,
H. Hofmann ,
C. J. G. Plummer ,
G. Carrot ,
J. Hilborn  and
M. Akinc
R. Vacassy
Affiliation:
Powder Technology Laboratory (LTP), Dept. of Materials Science, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
S. M. Scholz
Affiliation:
Powder Technology Laboratory (LTP), Dept. of Materials Science, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
J. Dutta
Affiliation:
Powder Technology Laboratory (LTP), Dept. of Materials Science, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
H. Hofmann
Affiliation:
Powder Technology Laboratory (LTP), Dept. of Materials Science, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
C. J. G. Plummer
Affiliation:
Polymer Laboratory (LP), Dept. of Materials Science, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
G. Carrot
Affiliation:
Polymer Laboratory (LP), Dept. of Materials Science, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
J. Hilborn
Affiliation:
Polymer Laboratory (LP), Dept. of Materials Science, Swiss Federal Institute of Technology (EPFL), CH-1015 Lausanne, Switzerland
M. Akinc
Affiliation:
Dept. of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011
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Abstract

Zinc sulphide (ZnS) particles are efficient phosphors for application in flat-panel displays. Spherical ZnS particles were prepared by precipitation from a homogeneous solution. Nanoparticles of 20 to 40 nm having a very narrow size distribution could be synthesized by using complexing chelates such as acetate and acetylacetonate. Complexing of the precipitating cation with the anions present in the system lead to a limited concentration of free cations in the solution. This strongly influences the kinetics of the primary particle agglomeration/growth, resulting in nanometer-sized ZnS particles. Nanostructured ZnS synthesized in this way are polycrystalline particles composed of crystallites of 5–10 nm. The synthesis of very small, non-agglomerated, nanocrystalline particles in the 5–10 nm size range was also possible, making use of a strong complexing ligand (thioglycerol) during the synthesis. The synthesis of controlled monosized ZnS particles will be presented and discussed. The photoluminescence characteristics of ZnS make this material a suitable candidate as phosphor for application in low voltage display technology. The effect of Mn2+ doping on the luminescence characteristics of ZnS will also be discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 501: Symposium FF – Surface Controlled Nanoscale Materials for High-Added… , 1997 , 369
Copyright
Copyright © Materials Research Society 1998

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References

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