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Preparation of CaAl2O4: Eu2+ Long Persistent Blue Phosphor

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Abstract:

CaAl2O4:Eu2+ with high brightness and long persistent luminescence were prepared by solid state reaction method. The phosphor compositions with varying Eu2+ were investigated by powder X-ray diffractometer (XRD), SEM, TEM, photoluminescence excitation and emission spectra. Broad band UV excited luminescence of the CaAl2O4:Eu2+ was observed in the blue region (λmax = 440 nm) due to transitions from the 4f65d1 to the 4f7 configuration of the Eu2+ ion. The particle size also plays a role deciding the luminescence characteristics of these phosphors. The decay time of the persistence indicated that the persistent luminescence phosphor has bright phosphorescence and maintains a long duration.

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Periodical:

Advanced Materials Research (Volumes 26-28)

Pages:

573-576

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.26-28.573

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Online since:

October 2007

Authors:

K.S. Bartwal, B.K. Singh, H. Ryu

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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