UV-to-red relaxation pathways in CaTiO3:Pr3+

被引：192
作者：
Boutinaud, P [1 ]
Pinel, E
Dubois, M
Vink, AP
Mahiou, R
机构：
[1] Univ Clermont Ferrand, Lab Mat Inorgan, CNRS, UMR 6002, F-63177 Aubiere, France
[2] ENSCCF, Ensemble Sci Cezeaux, F-63177 Aubiere, France
[3] Delft Univ Technol, Interfac Reactor Inst, Radiat Technol Grp, NL-2629 JB Delft, Netherlands
来源：
JOURNAL OF LUMINESCENCE | 2005年 / 111卷 / 1-2期
关键词：
CaTiO3 : Pr3+; charge transfer states; EPR; excitons; photoluminescence; relaxation;
D O I：
10.1016/j.jlumin.2004.06.006
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The radiationless relaxation pathways leading to the quenching of P-3(0) emission and subsequent atypical single red luminescence from D-1(2) level in CaTiO3:Pr3+ are studied under UV excitation. Self-trapped excitons are shown to participate in the relaxation process and Pr3+ /Ti4+ reversible arrow Pr4+ /Ti3+ charge transfer state (CTS) is proposed as the final relaxation channel to the emitting D-1(2) level. This mechanism is supported by EPR investigations showing an increase of paramagnetic [Pr4+Ti3+O3](+) clusters upon optical excitation in the CTS. (C) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：69 / 80
页数：12
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