Luminescence of the Cr3+ ions doped in PLZT ceramics

Han, T. P. J. and Jardiel, M. T. and Villegas, M. and Caballero, A. C. and Bravo, D. and Jaque, F. (2011) Luminescence of the Cr3+ ions doped in PLZT ceramics. Chemical Physics Letters, 506 (4-6). pp. 201-204. ISSN 0009-2614

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Abstract

The photoluminescence properties of Cr-doped PLZT-9/65/35 (Pb0.95La0.09Zr0.65Ti0.35O3) have been studied. The fluorescence spectra consist of two inhomogeneously broadened narrow bands centred at similar to 734 and 740 nm and a broadband emission with a maximum at similar to 1000 nm. The two high energy bands have been assigned to the E-2(T-2(1)) -> (4)A(2) transition of two Cr3+ defect centres in octahedral site with high/ intermediate crystal field strength whereas the near infrared emission is tentatively assigned to the overlapping of the broadband emission of the Cr3+ ions defect centre's T-4(2) -> (4)A(2) transition and the emission of the Cr5+ ions' E-2 -> T-2(2) transition. (c) 2011 Elsevier B.V. All rights reserved.