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Characterization and luminescence properties of CaMgSi 2 O 6 :Eu 2+ blue phosphor
Author(s) -
Chandrakar P.,
Baghel R. N.,
Bisen D. P.,
Chandra B. P.
Publication year - 2015
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.2855
Subject(s) - phosphor , luminescence , characterization (materials science) , chemistry , radiochemistry , analytical chemistry (journal) , materials science , mineralogy , nanotechnology , optoelectronics , chromatography
A blue CaMgSi 2 O 6 :Eu 2+ phosphor was prepared by the solid‐state reaction method and the phosphor characterized in terms of crystal structure, particle size, photoluminescence (PL), thermoluminescence (TL) and mechanoluminescence (ML) properties using X‐ray diffraction (XRD), transmission electron microscopy (TEM), PL spectroscopy, TLD reader and ML impact technique. The XRD result shows that phosphor is formed in a single phase and has a monoclinic structure with the space group C2/c. Furthermore, the PL excitation spectra of Eu 2+ ‐doped CaMgSi 2 O 6 phosphor showed a strong band peak at 356 nm and the PL emission spectrum has a peak at 450 nm. The depths and frequency factors of trap centers were calculated using the TL glow curve by deconvolution method in which the trap depths were found to be 0.48 and 0.61 eV. The formation of CaMgSi 2 O 6 :Eu 2+ phosphor was confirmed by Fourier transform infrared spectroscopy. The ML intensity increased linearly with the impact velocity of the piston used to deform the phosphor. It was shown that the local piezoelectricity‐induced electron bombardment model is responsible for the ML emission. Finally, the optical properties of CaMgSi 2 O 6 :Eu 2+ phosphors are discussed. Copyright © 2015 John Wiley & Sons, Ltd.