Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 451, Issue 1-2, Pages 122-124Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2007.04.098
Keywords
upconversion; energy transfer; excitation state absorption
Ask authors/readers for more resources
1% Tm3+, 10% Ho3+ single-doped and 10% Tm3+, 10% Ho3+ co-doped Cs2NaGdCl6 samples were synthesized by Morss method E. Under 785 nm semiconductor laser pumping, the upconversion fluorescence in Tm3+ single-doped and Tm3+, Ho3+ co-doped Cs2NaGdCl6 was investigated at room temperature. For 1% Tm3+-doped sample, three upconversion emission bands near 483 nm, 658 nm and 701 nm were obtained and assigned to be (1)G(4) -> H-3(6), (1)G(4) -> F-3(4) and F-3(3) -> H-3(6), respectively. For 10% Tm3+, 10% Ho3+ co-doped sample, four strong upconverted emissions near 492 nm. (blue), 543 nm (green), 588 nm (yellow) and 657 nm (red) were measured and assigned to be F-5(3) -> I-5(8), S-5(2) -> I-5(8), (5)G(4) -> I-5(6) and F-5(5) -> I-5(8) transitions of Ho3+ ions. With the help of the measuring power dependence of all these upconversion emissions, a reasonable upconversion mechanism model responsible for them was presented. The analysis of these upconversion emissions confirmed the efficient energy transfer from Tm3+(F-3(4)) to Ho3+(I-5(7)) ions. (C) 2007 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available