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Investigation of Local Structures Around Luminescent Centers in Doped Nanocrystal Phosphors

Published online by Cambridge University Press:  15 February 2011

Y. L. Soo ,
S. W. Huang ,
Z. H. Ming ,
Y. H. Kao ,
E. Goldburt ,
R. Hodel ,
B. Kulkarni  and
R. Bhargava
Y. L. Soo
Affiliation:
Department of Physics, State University of New York at Buffalo, Buffalo, New York 14261
S. W. Huang
Affiliation:
Department of Physics, State University of New York at Buffalo, Buffalo, New York 14261
Z. H. Ming
Affiliation:
Department of Physics, State University of New York at Buffalo, Buffalo, New York 14261
Y. H. Kao
Affiliation:
Department of Physics, State University of New York at Buffalo, Buffalo, New York 14261
E. Goldburt
Affiliation:
Nanocrystals Technology, P.O. Box 820, Briarcliff Manor, New York 10510.
R. Hodel
Affiliation:
Nanocrystals Technology, P.O. Box 820, Briarcliff Manor, New York 10510.
B. Kulkarni
Affiliation:
Nanocrystals Technology, P.O. Box 820, Briarcliff Manor, New York 10510.
R. Bhargava
Affiliation:
Nanocrystals Technology, P.O. Box 820, Briarcliff Manor, New York 10510.
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Abstract

Extended x-ray absorption fine structure (EXAFS) technique has been employed to investigate the local structures around luminescent centers in nanocrystals of Mn-doped ZnS and Tb-doped Y2O3. Size-dependent local structural changes around Mn luminescent centers have been found in Mn-doped nanocrystals of ZnS by using Mn K-edge EXAFS. Local structures around Tb investigated by Tb Li-edge EXAFS also show substantial differences between bulk and nanocrystal samples. This structural information is useful for understanding the novel optical properties of doped nanocrystals.

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