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Synthesis and characterization of blue long‐lasting BaCa 2 Al 8 O 15 :Eu 2+ , Dy 3+ phosphor
Author(s) -
Yerpude A. N.,
Dhoble S. J.,
Haranath D.
Publication year - 2013
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.2473
Subject(s) - phosphor , thermoluminescence , afterglow , photoluminescence , luminescence , scanning electron microscope , analytical chemistry (journal) , phosphorescence , ion , excited state , materials science , doping , emission spectrum , chemistry , spectral line , fluorescence , atomic physics , optics , optoelectronics , physics , gamma ray burst , organic chemistry , chromatography , astronomy , composite material
We have synthesized and characterized a new BaCa 2 Al 8 O 15 :Eu 2+ ,Dy 3+ phosphor prepared by the combustion method. X‐ray diffraction, thermoluminescence, scanning electron microscope, time decay and optical spectral analysis photoluminescence excitation, emission spectra were used to characterize the phosphors. Broadband ultraviolet excited luminescence of the BaCa 2 Al 8 O 15 :Eu 2+ ,Dy 3+ was observed in the blue region (λ max = 435 nm) due to transitions from the 4f 6 5d 1 to the 4f 7 configuration of the Eu 2+ ion. Scanning electron microscopy has been used for exploring the morphological properties of the prepared phosphors. The BaCa 2 Al 8 O 15 :Eu 2+ phosphor has a blue afterglow when Dy 3+ ions were co‐doped. The thermoluminescence spectra show that the Dy 3+ ion induces a proper trap in the phosphor with a depth of 0.67 eV and results in a long afterglow phosphorescence. Copyright © 2013 John Wiley & Sons, Ltd.