NaYF4∶Eu3+, Tm3+, Yb3+材料中Stokes和反Stokes发光研究

doi:10.3964/j.issn.1000-0593(2009)09-2317-04

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摘要：合成了Eu³⁺,Tm³⁺和Yb³⁺掺杂的NaYF₄材料。360 nm光激发呈蓝色发光，峰值位于452 nm，对应Tm³⁺的¹D₂→³F₄跃迁;395 nm光激发呈橙色发光，峰值位于591 nm，对应Eu³⁺的⁵D₀→⁷F₁跃迁;409 nm光激发呈红色发光，峰值位于613 nm，对应Eu³⁺的⁵D₀→⁷F₂跃迁;980 nm光激发呈蓝色和红色发光，发光峰位于474和646 nm。蓝光来源Tm³⁺的¹G₄ →³H₆跃迁，红光来源Tm³⁺的¹G₄→³F₄跃迁。在双对数曲线中，蓝光474 nm和红光646 nm的斜率分别为2.1和2.4，在980 nm光激发下，蓝光和红光发射都是双光子过程。还研究了材料的吸收光谱，并利用X射线衍射，扫描电镜测试了材料的物相结构和微观形貌。结果表明：NaYF₄∶Eu³⁺, Tm³⁺, Yb³⁺材料具有较规则的六方相结构，结晶良好。

关键词：共沉淀法;NaYF₄: Eu³⁺;Tm³⁺;Yb³⁺;Stokes和反Stokes发光;稀土离子

Abstract：The sample of NaYF₄∶Eu,Tm,Yb was synthesized by coprecipitation method. The emission of NaYF₄∶Eu,Tm,Yb excited by 360 nm is blue light with the peak at 452 nm from the transition of ¹D₂→³F₄ of Tm³⁺. After being excited by 395 nm, NaYF₄∶Eu,Tm,Yb emits orange light with the peak at 591 nm originating from the transition of 5D₀→⁷F₁ of Eu³⁺. When excited by 409 nm, NaYF₄∶Eu,Tm,Yb emits red light with the peak at 613 nm from the transition of ⁵D₀→⁷F₂ of Eu³⁺. The color of upconversion luminescence of NaYF₄∶Eu,Tm,Yb excited by 980 nm was blue and red. The upconversion spectrum exhibits distinct emission peaks at 459, 478 and 641 nm. The blue light comes from the transition of ¹G₄→³H₆ and ¹D₂→³F₄ of Tm³⁺. The absorption spectrum was also researched. The red light results from the transition of ¹G₄→³F₄ of Tm³⁺. The slope of the emission of 474 and 646 nm is 2.1 and 2.4 respectively. The emission of 478 and 641 nm is all due to three photon process. The structural properties of sample were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results show that NaYF₄∶Tm³⁺,Yb³⁺ prepared by coprecipitation method exhibits a hexagonal crystal.

Key words：Co-precipitation method;Product of NaYF₄∶Eu³⁺;Tm³⁺;Yb³⁺;Stokes and anti-Stokes luminescence;Rare earth ion

收稿日期: 2008-05-10 修订日期: 2008-08-20

中图分类号:

O482.3，O614.3

通讯作者: 孙家跃 E-mail: sunjy@btbu.edu.cn

引用本文:

杜海燕,杨志萍,孙家跃^*. NaYF₄∶Eu³⁺, Tm³⁺, Yb³⁺材料中Stokes和反Stokes发光研究[J]. 光谱学与光谱分析, 2009, 29(09): 2317-2320.
DU Hai-yan,YANG Zhi-ping,SUN Jia-yue^*. Stokes and Anti-Stokes Luminescence Research of NaYF₄∶Eu³⁺, Tm³⁺, Yb³⁺. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(09): 2317-2320.

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