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Optical properties of Eu3+ activated SrLa2O4 red-emitting phosphors for WLED applications
Perumal R.N, Subalakshmi G, Varadarajan E, Sadhasivam S,
Published in Springer New York LLC
2018
Volume: 29
   
Issue: 4
Pages: 2638 - 2644
Abstract
The SrLa2−xO4:xEu3+ phosphors are synthesized through high-temperature solid-state reaction method at 1473 K with various doping concentration. Their phase structures, absorption spectra, and luminescence properties are investigated by X-ray diffraction (XRD), UV–Vis spectrophotometer and photoluminescence spectrometry. The intense absorption of SrLa2−xO4:xEu3+ phosphors have occurred around 400 nm. The prominent luminescence spectra of the prepared phosphors exhibited bright red emission at 626 nm. The doping concentration 0.12 mol% of Eu3+ is shown to be optimal for prominent red emission and chromaticity coordinates are x = 0.692, y = 0.3072. Considering the high colour purity and appropriate emission intensity of Eu3+ doped SrLa2O4 can be used as red phosphors for white light emitting diodes (WLEDs). © 2017, Springer Science+Business Media, LLC, part of Springer Nature.
About the journal
JournalData powered by TypesetJournal of Materials Science: Materials in Electronics
PublisherData powered by TypesetSpringer New York LLC
ISSN09574522
Open AccessNo
Concepts (20)
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    Absorption spectroscopy
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    Europium
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    High temperature applications
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    Lanthanum compounds
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    Light emission
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    Light emitting diodes
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    Luminescence
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    Optical properties
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    Phosphors
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    Solid state reactions
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    X ray diffraction
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    CHROMATICITY COORDINATES
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    Doping concentration
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    Emission intensity
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    HIGH TEMPERATURE SOLID-STATE REACTION
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    Luminescence properties
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    LUMINESCENCE SPECTRUM
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    RED EMITTING PHOSPHOR
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    WHITE LIGHTEMITTING DIODES (WLEDS)
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    EUROPIUM COMPOUNDS