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Luminescence study of Eu 3+ doped Li 6 Y(BO 3 ) 3 phosphor for solid‐state lighting
Author(s) -
Yawalkar Mrunal M.,
Zade G. D.,
Dabre K. V.,
Dhoble S. J.
Publication year - 2016
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.3006
Subject(s) - phosphor , chromaticity , luminescence , excited state , analytical chemistry (journal) , emission spectrum , ion , doping , materials science , chemistry , spectral line , optoelectronics , atomic physics , optics , physics , organic chemistry , chromatography , astronomy
Abstract In this study, Li 6 Y 1– x Eu x (BO 3 ) 3 phosphor was successfully synthesized using a modified solid‐state diffusion method. The Eu 3+ ion concentration was varied at 0.05, 0.1, 0.2, 0.5 and 1 mol%. The phosphor was characterized for phase purity, morphology, luminescent properties and molecular transmission at room temperature. The XRD pattern suggests a result closely matching the standard JCPDS file (#80‐0843). The emission and excitation spectra were followed to discover the luminescence traits. The excitation spectra indicate that the current phosphor can be efficiently excited at 395 nm and at 466 nm (blue light) to give emission at 595 and 614 nm due to the 5 D 0 → 7 F j transition of Eu 3+ ions. Concentration quenching was observed at 0.5 mol% Eu 3+ in the Li 6 Y 1–x Eu x (BO 3 ) 3 host lattice. Strong red emission with CIE chromaticity coordinates of phosphor is x = 0.63 and y = 0.36 achieved with dominant red emission at 614 nm the 5 D 0 → 7 F 2 electric dipole transition of Eu 3+ ions. The novel Li 6 Y 1–x Eu x (BO 3 ) 3 phosphor may be a suitable red‐emitting component for solid‐state lighting using double‐excited wavelengths, i.e. near‐UV at 395 nm and blue light at 466 nm. Copyright © 2015 John Wiley & Sons, Ltd.