In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 52, No. 1S ( 2013-01-01), p. 01AM02-
Abstract:
ZrO 2 :Er 3+ and ZrO 2 :Er 3+ ,Yb 3+ phosphors were synthesized via a solvothermal reaction method. For low concentrations of Yb 3+ , the crystalline structure changed from the tetragonal to monoclinic phase as sintering temperature increased. As the Yb 3+ concentration increased to a value above 0.05 mol, ZrO 2 phosphors displayed a very stable tetragonal phase. The green and red upconversion emissions of ZrO 2 :Er 3+ ,Yb 3+ phosphors were measured under the excitation with a 975 nm continuous wave diode laser, and the pump power dependence of upconversion intensity was investigated. As the Yb 3+ concentration increased from 0 to 0.05 mol, the red upconversion emission intensity increased more rapidly than the green emission intensity. This is attributed to the energy transfer ( 4 I 11/2 → 4 I 15/2 4 I 13/2 → 4 F 9/2 ) between Er 3+ ions and the energy back transfer [ 4 S 3/2 4 I 13/2 (Er 3+ )→ 2 F 7/2 2 F 5/2 (Yb 3+ )] between the Er 3+ and Yb 3+ ions. In this case, the pump power dependence of red emission intensity changed from quadratic to linear as Yb 3+ concentration increased.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.7567/JJAP.52.01AM02
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
2013
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
Permalink