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Materials Chemistry and Physics, Vol.111, No.1, 186-189, 2008
Investigations on luminescence characteristics of Eu and Cr codoped BaAl2O4
Green phosphor BaAl2O4:Eu2+, Cr3+ with varying concentrations of Cr codoping were prepared by solid-state synthesis method. The synthesized compositions were characterized for their phase, morphology and crystallinity by powder X-ray diffraction, SEM and TEM techniques. Photoluminescence properties were investigated measuring PL. and decay time. Broad band UV excited luminescence was observed for BaAl2O4:Eu2+, Cr3+ in the green region (lambda(max) = 500 nm) due to transitions from 4f(6) 5d(1) to the 4f(7) configuration of the Eu2+ ion. The effect of Cr doping on crystalline quality, morphology and photoluminescence characteristics of prepared compositions was investigated. (c) 2008 Elsevier B.V. All rights reserved.