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Enhanced photoluminescence intensity of blue-light-emitting BaMgAlO:Eu phosphor with Dy co-doping

Journal of Materials Science: Materials in Electronics, ISSN: 1573-482X, Vol: 31, Issue: 2, Page: 1116-1125
2020
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Eu-doped and Eu, Dy-co-doped BaMgAlO phosphors were prepared by solution combustion synthesis technique. The main aim of this work is to study the effect of Eu, Dy co-doping on the morphological and optical properties of BaMgAlO. The co-doping of Dy ions could not produce any change in the morphology, but the photoluminescence emission intensity of BaMgAlO:Eu, Dy increased nearly 36% with the addition of Dy ions compared to BaMgAlO:Eu phosphor. The BaMgAlO:Eu, Dy phosphor emitted good-quality blue light at wavelength 450 nm. The blue emission was originated from 4f5d → 4f transition of Eu ions, whereas Dy ions were vital in creating traps. Thermoluminescence study was performed to calculate the activation energy of the traps formed and the order of kinetics. The inclusion of Dy ions not only enhanced the photoluminescence intensity but also improved the thermal stability of BaMgAlO:Eu phosphor. The results of the present work indicate that photoluminescence properties and thermal stability of BaMgAlO:Eu phosphor can be enhanced by Dy co-doping.

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