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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摘要：用高温固相法制备了Y₂O₂S:Eu³⁺, Mg²⁺, Ti⁴⁺红色长余辉材料。测量了该材料的余辉曲线，余辉时间为1 h以上;由X射线衍射得到晶体结构为Y₂O₂S。测量了不同Eu³⁺摩尔浓度下的激发光谱和发射光谱，得到从⁵D_J(J=0, 1, 2, 3)-⁷F_J(J=0, 1, 2, 3, 4，5)的发射谱线，并得到位于260, 345, 468和540 nm激发峰。由于激活剂饱和效应，Y₂O₂S:Eu³⁺, Mg²⁺, Ti⁴⁺发射光谱中513.6, 540.1, 556.4, 587.3和589.3 nm属于从⁵D₂，⁵D₁到⁷F_J(J=0, 1, 2, 3, 4)跃迁的发射峰随Eu³⁺摩尔浓度的增加相对削弱;激发谱包括位于350 nm左右属于电荷转移态吸收(Eu³⁺—O^2-, Eu³⁺—S^2-)的激发主峰和在可见光区位于468，520和540 nm属于Eu³⁺离子4f-4f吸收的激发峰。随着Eu³⁺摩尔浓度的增加，位于468，520和540 nm的激发峰相对增强。

关键词：激发光谱;发射光谱;Y₂O₂S:Eu³⁺;Mg²⁺;Ti⁴⁺

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⁺

收稿日期: 2003-08-18 修订日期: 2003-12-29

中图分类号:

O483

通讯作者: 杨志平

引用本文:

杨志平，郭智，朱胜超，王文杰. Eu³⁺摩尔浓度对Y₂O₂S:Eu³⁺, Mg²⁺, Ti⁴⁺红色长余辉材料光谱的影响 [J]. 光谱学与光谱分析, 2004, 24(12): 1506-1510.
YANG Zhi-ping, GUO Zhi, ZHU Sheng-chao, WANG Wen-jie . Effect of Eu³⁺ Molar Ratio on the Spectra of Y₂O₂S:Eu³⁺, Mg²⁺ and Ti⁴⁺ Red Phosphor . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2004, 24(12): 1506-1510.

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