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| Eu3 掺杂β"-Al2O3荧光粉的制备及发光性能研究 |
| Preparation and Luminescent Properties of Eu3 doping β"-Al2O3 Phosphors |
| 投稿时间：2024-04-01 修订日期：2024-04-19 |
| DOI： |
| 中文关键词: β"-Al2O3 固相法 Eu3 掺杂 浓度猝灭 |
| 英文关键词:β"-Al2O3 Solid state method Eu3 doping Concentration quenching |
| 基金项目:辽宁省教育厅基本科研项目(JYTMS20230040)；中国石油天然气股份有限公司石油化工研究院项目(2021210207000265) |
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| 中文摘要: |
| 采用固相法制备不同比例的Eu3 掺杂的β"-Al2O3荧光粉。测试了粉体物相结构、表面形貌、荧光光谱、电/磁偶极跃迁强度随Eu3 浓度的变化规律、荧光寿命以及CIE色度值。结果表明：Eu3 不等价取代Na 后其浓度的差异对于样品的晶体结构影响较大，当Eu3 的掺杂量低于0.03 mol时，产物保持β"-Al2O3相，当掺杂浓度大于0.03 mol时出现杂相。在395 nm近紫外激发下，发射光谱表现出强5D0→7F2跃迁，说明大部分Eu3 处于β"-Al2O3传导层中非反演对称格位上。基于浓度猝灭理论分析，确证电多极距作用在β"-Al2O3: Eu3 荧光材料的浓度猝灭过程中占主导地位。此外，通过计算样品的平均荧光寿命，得出在β"-Al2O3: Eu3 体系中存在能量传递。CIE色度分析结果证实β"-Al2O3: Eu3 的发光色值接近于红光标准值，有望成为显示器件中潜在的红色组分。 |
| 英文摘要: |
| Using solid state method to preparation β"-Al2O3 phosphors with different proportions Eu3 doped. Tested XRD，SEM，fluorescence spectrum, variation law of electric/magnetic dipole transition intensity with Eu3 concentration, fluorescence lifetime, and CIE chromaticity value. The results showed that the concentration difference of Eu3 after replacing Na equivalently had a significant impact on the crystal structure of the sample. When the doping amount of Eu3 was less than 0.03 mol, all products were produced β"-Al2O3, on the contrary, impurities appear when the doping concentration is greater than 0.03 mol. Under near-ultraviolet excitation at 395 nm, the emission spectrum shows a strong 5D0 → 7F2 transition, indicating that most Eu3 in the non inversion symmetric lattice on the β"-Al2O3 conduction planes. Based on concentration quenching theory, it is confirmed that the effect of electric multipole distance on β"-Al2O3: Eu3 phosphors dominates the concentration quenching process. In addition, by calculating the average fluorescence lifetime of the samples, it was found that there are energy transfer interaction in the β"-Al2O3: Eu3 system. The CIE colorimetric confirm that luminescence color value of β"-Al2O3: Eu3 is close to the standard value of red light, and it is expected to become a potential red component in display devices. |
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