Enhanced photoluminescence intensity of blue-light-emitting BaMgAl_(10)O_(17):Eu~(2+) phosphor with Dy~(3+) co-doping

摘要

Eu~(2+)-doped and Eu~(2+), Dy~(3+)-co-doped BaMgAl_(10)O_(17) phosphors were prepared by solution combustion synthesis technique. The main aim of this work is to study the effect of Eu~(2+), Dy~(3+) co-doping on the morphological and optical properties of BaMgAl_(10)O_(17). The co-doping of Dy~(3+) ions could not produce any change in the morphology, but the photoluminescence emission intensity of BaMgAl_(10)O_(17):Eu~(2+), Dy~(3+) increased nearly 36% with the addition of Dy~(3+) ions compared to BaMgAl_(10)O_(17):Eu~(2+) phosphor. The BaMgAl_(10)O_(17):Eu~(2+), Dy~(3+) phosphor emitted good-quality blue light at wavelength 450 nm. The blue emission was originated from 4f~65d~1→4f~7 transition of Eu~(2+) ions, whereas Dy~(3+) 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~(3+) ions not only enhanced the photoluminescence intensity but also improved the thermal stability of BaMgAl_(10)O_(17):Eu~(2+) phosphor. The results of the present work indicate that photoluminescence properties and thermal stability of BaMgAl_(10)O_(17):Eu~(2+) phosphor can be enhanced by Dy~(3+) co-doping.