Eu3+摩尔浓度对Y2O2S:Eu3+, Mg2+, Ti4+红色长余辉材料光谱的影响

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Abstract Synthesis of Y₂O₂S:Eu³⁺, Mg²⁺ and Ti⁴⁺red phosphor by flux fusion method was presented. The decay curve of Y₂O₂S:Eu³⁺, Mg²⁺ and Ti⁴⁺ red phosphor was measured and the afterglow time was over one hour. The emission spectra and excitation spectra were measured, and the effect of Eu³⁺ molar ratio on the emission spectra and excitation spectra were also discussed. The emission spectra showed that Y₂O₂S:Eu³⁺, Mg²⁺ and Ti⁴⁺ had narrow emission peaks. The emission peaks ascribed to Eu³⁺ ions transition from ⁵D_J (J＝0, 1, 2, 3,) to ⁷F_J (J＝0，1，2，3，4，5) were found. With the increase of Eu³⁺ molar ratio, the emission peaks 513.6, 540.1，556.4，587.3 and 589.3 nm ascribed to the energy transition ⁵Ｄ₂，⁵Ｄ₁ to ⁷Ｆ_J(J＝0, 1, 2, 3, 4) deteriorated gradually relative to the main emission peak at 627.0 nm. The emission peaks ascribed to energy transition ⁵Ｄ₀ to ⁷Ｆ_J(J=0, 1, 2, 3, 4) didn’t weaken relative to the main emission peak. It was probably due to the so-called true activator saturation effect. This function on the higher activated states ⁵D₂ and ⁵D₁ was more distinct. The excitation spectra of Y₂O₂S:Eu³⁺, Mg²⁺ and Ti⁴⁺ showed that it had excitation peaks at 350 nm nearby, which was ascribed to the absorption of charge transfer (Eu³⁺-O^2-, Eu³⁺-S^2-). The excitation peaks at 468, 520 and 540 nm were ascribed to the representative energy transition 4f-4f of Eu³⁺ ions. With the increase of Eu³⁺ molar ratio, the excitation peaks 468, 520 and 540 nm strengthened relative to the main absorption peak at 350 nm nearby.

Key words：Excitation spectra;Emission spectra;Y₂O₂S:Eu³⁺;Mg²⁺;Ti⁴⁺

Received: 2003-08-18 Accepted: 2003-12-29

ZTFLH:

O483

Corresponding Authors: YANG Zhi-ping

Cite this article:

YANG Zhi-ping,GUO Zhi,ZHU Sheng-chao, et al. Effect of Eu³⁺ Molar Ratio on the Spectra of Y₂O₂S:Eu³⁺, Mg²⁺ and Ti⁴⁺ Red Phosphor [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(12): 1506-1510.

URL:

https://www.gpxygpfx.com/EN/Y2004/V24/I12/1506