| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 9586295 | Journal of Luminescence | 2005 | 12 Pages |
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+âPr4+/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.
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Authors
P. Boutinaud, E. Pinel, M. Dubois, A.P. Vink, R. Mahiou,