Photoluminescence properties of Eu[sup 3+]-doped ZnS nanocrystals prepared in a water/methanol solution

Qu, S. C.; Zhou, W. H.; Liu, F. Q.; Chen, N. F.; Wang, Z. G.; Pan, H. Y.; Yu, D. P.
May 2002
Applied Physics Letters;5/13/2002, Vol. 80 Issue 19, p3605
Academic Journal
Monodispersed ZnS and Eu[sup 3+]-doped ZnS nanocrystals have been prepared through the co-precipitation reaction of inorganic precursors ZnCl[sub 2], EuCl[sub 3], and Na[sub 2]S in a water/methanol binary solution. The mean particle sizes are about 3–5 nm. The structures of the as-prepared ZnS nanoparticles are cubic (zinc blende) as demonstrated by an x-ray powder diffraction. Photoluminescence studies showed a stable room temperature emission in the visible spectrum region for all the samples, with a broadening in the emission band and, in particular, a partially overlapped twin peak in the Eu[sup 3+]-doped ZnS nanocrystals. The experimental results also indicated that Eu[sup 3+]-doped ZnS nanocrystals, prepared by controlling synthetic conditions, were stable. © 2002 American Institute of Physics.


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