Synthesis and Luminescent Properties of Red Phosphor BaY₂O₄: Eu³⁺ for White Light-Emitting Diodes

Abstract:

The rare-earth Eu³⁺ doped BaY₂O₄ red phosphor synthesized by citric acid sol-gel method. The structure, morphology and composition of the red phosphor were characterized by X-ray diffraction, scanning electron microscopy and infrared spectroscopy. The results show that the distribution of the pure phase BaY₂O₄: Eu³⁺ particles after annealing at 800 °C was irregular, small size of particle is 0.2 μm to 0.4 μm. The excitation spectra of synthesized phosphor at 610 nm monitoring were composed of a broadband and a series of sharp peaks, the strongest excitation peak at 466 nm, the secondly at 395nm. It was indicated that BaY₂O₄: Eu³⁺ phosphor matching with the widespread applied the output wavelengths of UV LED and blue LED chips. The main emission spectra of samples under blue light excitation is Eu³⁺ ions ⁵D₀⁷F₂ electric dipole transition with a strong red light, so that the BaY₂O: Eu³⁺ phosphor may be a better candidate for red component for white LED.

• Periodical: Advanced Materials Research (Volume 811)
• Pages: 181-185
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.811.181
• Online since: September 2013
• Authors: Lan Tu Ya Wu
• Keywords: BaY₂O₄: Eu³⁺, Citric Acid Sol-Gel Method, Red Phosphor

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