基于NaYF_4的近红外激发上转换发光材料的发光特性
Luminous Properties of near Infrared Excited Upconversion Luminescent Materials Based on NaYF_4
查看参考文献15篇
文摘
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将Yb~(3+)作为协助发光的敏化剂,Tb~(3+)和Tm~(3+)作为发光中心的激活剂分别加入到基质氟化钇钠中,通过水热合成法分别制成不同掺杂浓度的NaYF_4:Yb~(3+)/Tb~(3+)和NaYF_4:Yb~(3+)/Tm~(3+)双掺杂氟化物纳米发光材料,并通过扫描电子显微镜、X射线衍射以及荧光光谱等手段分别对NaYF_4:Yb~(3+)/Tb~(3+)和NaYF_4:Yb~(3+)/Tm~(3+)双掺杂氟化物材料纳米颗粒的形貌及其发光特性进行了研究.实验结果表明:系列样品的X射线衍射图谱衍射峰与标准卡片吻合得很好,实验浓度范围内Yb~(3+)/Tb~(3+)和Yb~(3+)/Tm~(3+)共掺没有改变NaYF_4的晶体结构.实验得到了该材料在980 nm激光激发下的上转换发光光谱并分析了该材料的上转换发光机理,NaYF_4:Yb~(3+)/Tb~(3+)在980 nm激光激发的情况下出现的蓝光,绿光以及红光,分别对应于~5D_4→~7F_6、~5D_4→~7F_5、~5D_4→~7F_1的辐射跃迁;NaYF_4:Yb~(3+)/Tm~(3+)在980 nm光源激发下出现强的480 nm的蓝光,对应的是1G4→3H6的电子跃迁能级带,在660 nm强的红光发射谱带,对应的是~1G_4→~3F_4能级跃迁辐射光. |
其他语种文摘
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NaYF_4:Yb~(3+)/Tb~(3+)and NaYF_4:Yb~(3+)/Tm~(3+)double doping fluoride nanomaterials with different doping concentrations were prepared by hydrothermal synthesis. In these materials,the Yb~(3+) was used as sensitizer to assist in luminous,Tb~(3+) and Tm~(3+) were added to the matrix sodium yttrium fluoride as activators of luminous center. The morphology and luminous properties of NaYF_4:Yb~(3+)/Tb~(3+) and NaYF_4: Yb~(3+)/Tm~(3+) nanoparticles were investigated by scanning electron microscope (SEM),X-ray diffraction andfluorescence spectrum. The X-ray diffraction patterns of the series of samples well match the NaYF_4 standard card. Upconversion luminescence spectra of materials under 980 nm laser excitation were obtained and the mechanism was also analyzed. Excited by 980 nm laser,the emission spectra of NaYF_4: Yb~(3+)/Tb~(3+) including blue,green and red light,which correspond to the radiative transition of ~5D_4→~7F_6, ~5D_4→~7F_5,~5D_4→~7F_1,respectively. The strong 480 nm emission can be seen in NaYF_4:Yb~(3+)/Tm~(3+) excited by 980 nm laser,corresponding to the electron transition energy band of ~1G_4→~3H_6. A strong red light emission band centered at 660 nm is corresponding to the 1G4→3F4 energy level transition. |
来源
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光子学报
,2020,49(7):0716001 【核心库】
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DOI
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10.3788/gzxb20204907.0716001
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关键词
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氟化物
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纳米发光材料
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NaYF_4
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双掺杂
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上转换发光
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地址
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1.
西安邮电大学电子工程学院, 西安, 710121
2.
中国科学院西安光学精密机械研究所, 瞬态光学与光子技术国家重点实验室, 西安, 710119
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语种
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中文 |
文献类型
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研究性论文 |
ISSN
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1004-4213 |
学科
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物理学 |
基金
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国家自然科学基金
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陕西省教育厅项目
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文献收藏号
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CSCD:6784605
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