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

来源：

OPTICAL MATERIALS | 2011年 / 34卷 / 02期

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

页码：376 / 380

页数：5

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