Strong visible up-conversion emission in Tb3+, Tm3+ and Tb3+-Tm3+ co-doped tellurite glasses sensitized by Yb3+.

(7)F(4)) and red (660 nm: (5)D(4)-->(7)F(2)) up-conversion (UC) luminescence originating from Tb3+ is observed strongly, because of the quadratic dependences of emission intensities on the excitation power. Especially, the UC luminescence was intensified violently with the energy transfer from the Tm3+ ions involves in the Tb3+ excitation. To the Tb3+/Tm3+/Yb3+ triply doped glass system, a novel up-conversion mechanism is proposed as follows: the energy of (3)G(4) level (Tm3+) was transferred to (5)D(4) (Tb(3+)) and the 477-nm UC luminescence of Tm3+ was nearly quenched. -->
Substance Nomenclature: 0 (Ions)
06SSF7P179 (Terbium)
8RKC5ATI4P (Thulium)
IVA6SGP6QM (tellurous acid)
MNQ4O4WSI1 (Ytterbium)
NQA0O090ZJ (Tellurium)
Entry Date(s): Date Created: 20061118 Date Completed: 20070802 Latest Revision: 20131121
Update Code: 20231215
DOI: 10.1016/j.saa.2006.09.023
PMID: 17110158
Autor: Wang X; Shanghai Institute of Optics & Fine Mechanics, CAS, Shanghai 201800, China. xunsiwang@siom.ac.cn, Liu L, Nie Q, Xu T, Shen X, Dai S, Zhang X
Jazyk: angličtina
Zdroj: Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy [Spectrochim Acta A Mol Biomol Spectrosc] 2007 Jul; Vol. 67 (3-4), pp. 1025-9. Date of Electronic Publication: 2006 Sep 24.
DOI: 10.1016/j.saa.2006.09.023
Abstrakt: Up-conversion luminescence characteristics under 975 nm excitation have been investigated with Tb3+/Tm3+/Yb3+ triply doped tellurite glasses. Here, green (547 nm: (5)D(4)-->(7)F(4)) and red (660 nm: (5)D(4)-->(7)F(2)) up-conversion (UC) luminescence originating from Tb3+ is observed strongly, because of the quadratic dependences of emission intensities on the excitation power. Especially, the UC luminescence was intensified violently with the energy transfer from the Tm3+ ions involves in the Tb3+ excitation. To the Tb3+/Tm3+/Yb3+ triply doped glass system, a novel up-conversion mechanism is proposed as follows: the energy of (3)G(4) level (Tm3+) was transferred to (5)D(4) (Tb(3+)) and the 477-nm UC luminescence of Tm3+ was nearly quenched.
Databáze: MEDLINE
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