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Synthesis, PL characterizations and concentration quenching effect in Dy 3+ and Eu 3+ activated LiCaBO 3 phosphor
Author(s) -
Kharabe V. R.,
Oza Abha H.,
Dhoble S. J.
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.2756
Subject(s) - phosphor , photoluminescence , scanning electron microscope , quenching (fluorescence) , analytical chemistry (journal) , materials science , excited state , luminescence , emission spectrum , doping , powder diffraction , nuclear chemistry , spectral line , fluorescence , crystallography , chemistry , optics , physics , atomic physics , optoelectronics , chromatography , astronomy , composite material
LiCaBO 3 :Dy 3+ /Eu 3+ phosphors were synthesized by a solid‐state reaction. The synthesized materials were characterized using powder X‐ray diffraction pattern (XRD) for confirmation. All the structural parameters were calculated from the XRD data. Scanning electron microscopy (SEM) images showed rod‐like morphology. Photoluminescence (PL) emission spectra showed two emissions (484 and 577 nm) in Dy 3+ ‐doped LiCaBO 3 :Dy 3+ phosphors with the concentration quenching effect and the critical distance was calculated to be about 22.76 Å. LiCaBO 3 :Eu 3+ phosphor was effectively excited by a near‐UV light of 392 nm. The emission spectra exhibited the transition from 5 D 0 level to 7 F J (J = 0–2) with main emission at 614 nm, which comes from the electrodipole transition because of the asymmetric point group. The quenching concentration of Eu 3+ is about 0.2 mol%, and the critical distance was calculated to be about 38.93 Å. Copyright © 2014 John Wiley & Sons, Ltd.