Synthesis and Luminescence Properties of Red Emitting Phosphors Na₃CaB₅O₁₀:Eu³⁺

Abstract:

A series of new Na₃CaB₅O₁₀:Eu³⁺ phosphor was synthesized by a solid-state reaction method, and its luminescent properties were investigated. The phase formation of phosphors was confirmed by X-ray powder diffraction (XRD). The excitation spectra exhibited that the phosphors could be effectively excited by near ultraviolet (392 nm) and blue (464 nm) light, which perfectly match the emission wavelength of near-UV light-emitting diodes (LEDs). The emission spectra showed that two characteristic red emission lines peaking at 592 and 613 nm can be obtained upon 394 and 463 excitation with the chromaticity coordinates of (0.6347, 0.3649), which are due to ⁵D₀- ⁷F₁ and ⁵D₀-⁷F₂ transitions of Eu³⁺ ions. The effect of Eu³⁺ concentration on the emission spectrum of Na₃CaB₅O₁₀:Eu³⁺ phosphor was studied. The results showed that the emission intensity increased with increasing Eu³⁺ concentration, and then decreased because of concentration quenching. The obtained results indicated that this phosphor could be a promising candidate for near-UV white LEDs.

• Periodical: Advanced Materials Research (Volumes 295-297)
• Pages: 547-550
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.295-297.547
• Online since: July 2011
• Authors: Jia Yue Sun, Jin Li Lai, Hai Yan Du
• Keywords: Concentration Quenching, Luminescence, White LEDs

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