可变色荧光粉Li₆Gd(BO₃)₃:Tb³⁺/Bi³⁺、Eu³⁺的发光与能量转移
Luminescence and energy transfer of the color-tunable phosphor Li₆Gd(BO₃)₃:Tb³⁺/Bi³⁺, Eu³⁺.
作者信息
Chen Peican, Mo Fuwang, Guan Anxiang, Wang Rongfang, Wang Guofang, Xia Siyu, Zhou Liya
机构信息
School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
Guangxi Key Laboratory of Agricultural Products Processing (Cultivating Base), Colleges and Universities Key Laboratory for Efficient Use of Agricultural Resources in the Southeast of Guangxi, College of Chemistry and Material, Yulin Normal University, Yulin, Guangxi 537000, China.
出版信息
Appl Radiat Isot. 2016 Feb;108:148-153. doi: 10.1016/j.apradiso.2015.12.042. Epub 2015 Dec 17.
Bi(3+)/Tb(3+), Eu(3+) co-doped Li6Gd(BO3)3 (LGBO) phosphors were synthesized via a traditional solid-state method. Phase purity was investigated using X-ray diffraction, absorption strength of the phosphors were investigated by UV-vis absorption spectra, and the photoluminescence properties of the phosphors were studied systematically. Results showed that the emission intensity of Bi(3+), Eu(3+) co-doped LBOG was 2.76 times higher than that of Eu(3+)-doped LGBO irradiated at 275 nm, thereby implying the possibility of energy transfer from Bi(3+) to Eu(3+). The excitation spectra of Tb(3+), Eu(3+) co-doped LGBO phosphors are broader in comparison with single-doped phosphors and show tunable colors from green to yellow to orange-red when the ratio of Tb(3+) to Eu(3+) is adjusted These results demonstrate that LGBO:Tb(3+), Eu(3+) phosphors have potential use in light-emitting diodes.
通过传统固态法合成了Bi(3+)/Tb(3+)、Eu(3+)共掺杂的Li6Gd(BO3)3（LGBO）荧光粉。利用X射线衍射研究相纯度，通过紫外可见吸收光谱研究荧光粉的吸收强度，并系统研究了荧光粉的光致发光性能。结果表明，Bi(3+)、Eu(3+)共掺杂的LBOG在275nm激发下的发射强度比Eu(3+)掺杂的LGBO高2.76倍，这意味着存在从Bi(3+)到Eu(3+)的能量转移可能性。与单掺杂荧光粉相比，Tb(3+)、Eu(3+)共掺杂的LGBO荧光粉的激发光谱更宽，当调整Tb(3+)与Eu(3+)的比例时，可呈现从绿色到黄色再到橙红色的可调颜色。这些结果表明，LGBO:Tb(3+)、Eu(3+)荧光粉在发光二极管中具有潜在应用。
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