| 退火温度对LiBaPO4：Eu3+荧光粉的结构及发光性能影响 |
| Effect of Annealing Temperature on the Structure and Luminescence Properties of LiBaPO4: Eu3+ Phosphors |
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| 摘要: 采用溶胶-凝胶法制备了LiBaPO4：Eu3+荧光粉，通过热重-差热分析（TG-DTA）、傅里叶变换红外（IR）光谱、X射线衍射（XRD）、透射电子显微镜（TEM）、荧光光谱对荧光粉的结构、发光性质进行表征。TG-DTA结果表明在700 ℃之后可形成LiBaPO4相。IR谱图证实了PO43-离子的存在。XRD结果表明：温度变化会引起衍射峰不同程度的劈裂；Eu3+掺杂浓度会对样品晶相有影响，掺杂浓度较小时样品出现杂相，随着掺杂浓度增加，样品为纯相六方晶系LiBaPO4。TEM结果表明随着浓度的增加，材料颗粒会发生一定程度的团聚。荧光结果表明：由于活化剂在不同温度下的晶体结构和配位环境的差异，制备的LiBaPO4：Eu3+在不同的退火温度下最佳激发波长不同，其主导的能级跃迁也有所差异，且Eu3+引起的浓度猝灭情况也随之而变。CIE计算结果表明，随着退火温度升高，样品色纯度逐渐变好。LiBaPO4：Eu3+可被394 nm长波紫外光有效激发，说明其在白光发光二极管领域有潜在的应用价值。 |
| 关键词: 溶胶-凝胶法 LiBaPO4：Eu3+荧光粉 退火温度 掺杂浓度 发光性质 |
| 基金项目: |
| Abstract: The LiBaPO4:Eu3+ phosphors were prepared by the sol-gel method, and the structure and luminescence properties of the phosphors were characterized by thermogravimetric-differential thermal analysis (TG-DTA), Fourier transformation infrared (IR) spectrum, X-ray diffraction (XRD), transmission electron microscope (TEM), and fluorescence spectrum. TG-DTA results showed that the LiBaPO4 phase can be formed upon 700℃. IR spectra confirmed the existence of PO43- ions. XRD results showed that temperature change can cause different degrees of cleavage of the diffraction peaks. Eu3+ doping concentration can affect the crystal phase of the sample, and the samples with a lower doping concentration appeared impurity, as the doping concentration increased, the sample was a pure phase of hexagonal crystals LiBaPO4. TEM showed that the material particles agglomerated to a certain extent with the increase in concentration. The fluorescence measurement results showed that LiBaPO4:Eu3+ had different optimal excitation wavelengths at different annealing temperatures and its dominant energy level transition is due to the differences in the crystal structure and coordination environment of the activator at different temperatures, and the concentration quenching caused by Eu3+ also varied. CIE calculation results showed that the color purity of the sample gradually improved with the increase of annealing temperature. LiBaPO4:Eu3+ can be effectively excited by 394 nm long-wave ultraviolet light, indicating its potential application in the field of white light-emitting diodes. |
| Keywords: sol-gel method LiBaPO4: Eu3+ phosphors annealing temperature doping concentration luminescent properties |
| 投稿时间：2022-04-02 修订日期：2022-08-25 |
| 摘要点击次数: 1185 |
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| 史荣,王喜贵.退火温度对LiBaPO4：Eu3+荧光粉的结构及发光性能影响[J].无机化学学报,2022,38(11):2275-2282. |
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