Phase transition control, melt growth of (Gd,RE)F 3 single crystal and their luminescent properties
Rare-earth sesquifluorides with no absorption in visible spectral region, such as LaF 3, GdF 3, LuF 3, YF 3, ScF 3, are the topic of intense study as a host for luminescence materials. However, except Nd:LaF 3, they are not studied as a host for laser materials. The main obstacle troubling further s...
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Published in | Journal of luminescence Vol. 129; no. 12; pp. 1646 - 1650 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
01.12.2009
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Subjects | |
Online Access | Get full text |
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Summary: | Rare-earth sesquifluorides with no absorption in visible spectral region, such as LaF
3, GdF
3, LuF
3, YF
3, ScF
3, are the topic of intense study as a host for luminescence materials. However, except Nd:LaF
3, they are not studied as a host for laser materials. The main obstacle troubling further study of GdF
3, LuF
3, YF
3, ScF
3 single crystal is the fact that there is first-order phase transition (LaF
3 type↔beta-YF
3 type for GdF
3, alpha-YF
3 type↔beta-YF
3 type for the rest) between the room and melting temperature.To prevent the phase transition, first of all, we have tried to make solid solution between GdF
3 and YF
3 in such a way that the average cation radii can be shifted to the size that does not have phase transition. Ce
3+ perturbed luminescence was observed in the Ce- and Sr-codoped GdF
3–YF
3 system. Similar solid solution concept was applied to the combination between GdF
3 and YbF
3. The emission spectrum of Yb
3+ that exhibits broad bands around 1
μm was observed. Room temperature up-conversion luminescence spectra of Pr
3+-doped Gd
1−
x
Yb
x
F
3 were studied and visible emission from Pr
3+ was obtained under infrared laser pumping in the Yb
3+ broad absorption band at 935.5
nm. |
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ISSN: | 0022-2313 1872-7883 |
DOI: | 10.1016/j.jlumin.2009.03.040 |