학술논문
Blue-green upconversion emission in Zr[O.sub.2]:[Yb.sup.3+] nanocrystals
Document Type
Report
Source
Journal of Applied Physics. Nov 15, 2008, Vol. 104 Issue 10, p103508
Subject
Language
English
ISSN
0021-8979
Abstract
An X-ray diffraction and high resolution transmission electron microscopy is used for the structural characterization of strong blue-green cooperative upconversion emission observed in Zr[O.sub.2]:[Yb.sup.3+] nanocrystals prepared by sol-gel process. The strong coorperative process among Yb ions is explained in terms of interaction enhancement due to the diminishing of Yb-Yb separation promoted partly by the surface recombination of nanocrystals.