Author/Authors :
Han، نويسنده , , T.P.J. and Jardiel، نويسنده , , M.T. and Villegas، نويسنده , , M. and Caballero، نويسنده , , A.C. and Bravo، نويسنده , , D. and Jaque، نويسنده , , F.، نويسنده ,
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 ∼734 and 740 nm and a broadband emission with a maximum at ∼1000 nm. The two high energy bands have been assigned to the 2 E ( 2 T 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 4 T 2 → 4 A 2 transition and the emission of the Cr5+ ions’ 2 E → 2 T 2 transition.
