Thermally stimulated luminescence of Ca3(PO4)2 and Ca9Ln(PO4)7 (Ln = Pr, Eu, Tb, Dy, Ho, Er, Lu)

被引：38

作者：

Lecointre, A. ^{[1
]}

Bessiere, A. ^{[1
,2
]}

Viana, B. ^{[1
]}

Ait Benhamou, R. ^{[3
]}

Gourier, D. ^{[1
]}

机构：

[1] Chim ParisTech, Ecole Natl Super Chim Paris, Lab Chim Mat Condensee Paris, CNRS,UMR 7574, F-75231 Paris 05, France

[2] Goa Univ, Dept Phys, Taleigao Plateau 403206, Goa, India

[3] Univ Cadi Ayyad, Lab Mat Condensee & Environm, Fac Sci Semlalia, Marrakech, Morocco

来源：

RADIATION MEASUREMENTS | 2010年 / 45卷 / 3-6期

关键词：

Whitlockite; Calcium phosphate; Persistent phosphor; Thermally stimulated luminescence; BETA-TRICALCIUM PHOSPHATE; THERMOLUMINESCENCE; DYSPROSIUM;

D O I：

10.1016/j.radmeas.2010.02.008

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

The series of whitlockite compounds Ca-3(PO4)(2) and Ca(9)Ln(PO4)(7) (Ln = Pr, Eu, Tb, Dy, Ho, Er, Lu) was studied in radioluminescence (RL) and thermally stimulated luminescence (TSL) excited by X-rays. f-f emission lines of Ln(3+) were observed in RL for Ca(9)Ln(PO4)(7) (Ln = Pr, Eu, Tb, Dy, Ho, Er) whereas d-d emission band of the impurity Mn2+ was observed in Mn:Ca-3(PO4)(2) and Mn:Ca9Lu(PO4)(7) at 655 nm. In TSL, the Eu, Ho and Er compounds did not show any signal. As Eu3+, Ho3+ and Er3+ present the highest Ln(3+)/Ln(4+) ionization potential (IP) of the series, this was interpreted as the inability of these lanthanides to trap a hole. On the contrary Pr3+ in Ca9Pr(PO4)(7), Tb3+ in Ca9Tb(PO4)(7). Dy3+ in Ca9Dy(PO4)(7), Mn2+ in Mn:Ca-3(PO4)(2) and Mn:Ca9Lu(PO4)(7) were identified as hole traps and radiative recombination centers in the TSL mechanism. Ca9Tb(PO4)(7) was found to be a high intensity green persistent phosphor whereas Mn:Ca9Lu(PO4)(7) is a red persistent phosphor suitable for in vivo imaging application. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：273 / 276

页数：4

共 13 条

[1] New insight in the structure-luminescence relationships of Ca9Eu(PO4)7 [J].