Spectroscopic properties of Er3+/Yb3+ co-doped 50SiO2–20Al2O3–30CaF2 glass and glass ceramics
A spectroscopic investigation of Er3+/Yb3+ co-doped 50SiO2-20Al2O3-30CaF2 glasses and transparent glass ceramics containing CaF2 nanocrystals is presented. The formation of CaF2 nanocrystals in the glass ceramic was confirmed by x-ray diffraction (XRD) and transmission electron microscopy (TEM). The...
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Published in | Journal of physics. Condensed matter Vol. 18; no. 29; pp. 6937 - 6951 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Bristol
IOP Publishing
26.07.2006
Institute of Physics IOP Publishing [1989-....] |
Subjects | |
Online Access | Get full text |
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Summary: | A spectroscopic investigation of Er3+/Yb3+ co-doped 50SiO2-20Al2O3-30CaF2 glasses and transparent glass ceramics containing CaF2 nanocrystals is presented. The formation of CaF2 nanocrystals in the glass ceramic was confirmed by x-ray diffraction (XRD) and transmission electron microscopy (TEM). The Judd-Ofelt parameters of the Er3+ ions in the glass and glass ceramic have been calculated; they suggested that Er3+ ions had been incorporated into CaF2 nanocrystals in the glass ceramics. The upconversion luminescence intensity of the Er3+/Yb3+ co-doped glass ceramic was much stronger than that of the Er3+/Yb3+ co-doped glass. The upconversion luminescence mechanism has been ascribed to a two-photon absorption process for the green and red luminescence and a three-photon absorption process for the blue luminescence. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0953-8984 1361-648X |
DOI: | 10.1088/0953-8984/18/29/030 |