Title of article
UV-to-red relaxation pathways in CaTiO3:Pr3+
Author/Authors
P. Boutinaud، نويسنده , , E. Pinel، نويسنده , , M. Dubois، نويسنده , , A.P. Vink، نويسنده , , R. MAHIOU، نويسنده ,
Issue Information
روزنامه با شماره پیاپی سال 2005
Pages
12
From page
69
To page
80
Abstract
The radiationless relaxation pathways leading to the quenching of 3P0 emission and subsequent atypical single red luminescence from 1D2 level in CaTiO3:Pr3+ are studied under UV excitation. Self-trapped excitons are shown to participate in the relaxation process and Pr3+/Ti4+⇋Pr4+/Ti3+ charge transfer state (CTS) is proposed as the final relaxation channel to the emitting 1D2 level. This mechanism is supported by EPR investigations showing an increase of paramagnetic [Pr4+Ti3+O3]+ clusters upon optical excitation in the CTS.
Keywords
CaTiO3:Pr3+ , Charge transfer states , EPR , excitons , Photoluminescence , Relaxation
Journal title
Journal of Luminescence
Serial Year
2005
Journal title
Journal of Luminescence
Record number
1259521
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