Red long-lasting phosphorescence (LLP) in β-TCP type Ca9.5Mn(PO4)7 compounds

被引:23
|
作者
Lecointre, A. [1 ]
Benhamou, R. Ait [1 ,2 ]
Bessiere, A. [1 ]
Wallez, G. [1 ]
Elaatmani, M. [2 ]
Viana, B. [1 ]
机构
[1] Chim Paristech, Lab Chim Matiere Condensee Paris, UPMC, Coll France UMR CNRS 7574, F-75231 Paris 05, France
[2] Fac Sci Semlalia Marrakech, Lab Matiere Condensee & Environm, Marrakech 4000, Morocco
关键词
Phosphate compounds; Divalent manganese; Persistent luminescence; Thermally stimulated luminescence; TRICALCIUM PHOSPHATE; PERSISTENT LUMINESCENCE; CE3+; SPECTROSCOPY; IONS; EU2+;
D O I
10.1016/j.optmat.2011.05.020
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Mn-ion doped calcium phosphates namely Ca-5(PO4)(3)(OH) hydroxyapatite (HAP), beta-Ca-3(PO4)(2) (beta-TCP) as well as Ca9.5Mn(PO4)(7) whitlockite were synthesized and the optical properties of the Mn2+ cations were investigated. Annealing under reducing atmosphere enhances the emission of the divalent manganese species. Electron paramagnetic resonance (EPR) and optical spectroscopies confirm that Mn2+ ions are the active species. Orange and red emissions occur respectively for the Mn:HAP and Mn:TCP. For this latter, long-lasting phosphorescence (LLP) coming from the Mn2+ emission (T-4(1) -> (6)A(1) transition) is observed at 640 nm but it appears that the traps depths are either two shallow or too deep to lead to an efficient long-lasting emission. (C) 2011 Elsevier B.V. All flights reserved.
引用
收藏
页码:376 / 380
页数:5
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