NIR Upconversion Luminescence of NaYF4:Yb3+,Tm3+/CdSe Nanoheterostructures

HE Guang-hui; BI Xue-qing; SONG Wei-ye; DI Wei-hua; QIN Wei-ping

doi:10.3788/fgxb20153605.0491

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NIR Upconversion Luminescence of NaYF₄:Yb³⁺,Tm³⁺/CdSe Nanoheterostructures

更新时间：2020-08-12

- NIR Upconversion Luminescence of NaYF₄:Yb³⁺,Tm³⁺/CdSe Nanoheterostructures
- Chinese Journal of Luminescence Vol. 36, Issue 5, Pages: 491-496(2015)
- 作者机构：
  
  集成光电子学国家重点联合实验室吉林大学电子科学与工程学院,吉林长春,130012
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20153605.0491
  CLC： O482.31
- Received：12 January 2015，
  
  Revised：03 March 2015，
  
  Published：03 May 2015
- 稿件说明：
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何光辉, 毕雪晴, 宋维业等. NaYF4:Yb3+,Tm3+/CdSe纳米异质结构的近红外上转换发光性能[J]. 发光学报, 2015,36(5): 491-496

HE Guang-hui, BI Xue-qing, SONG Wei-ye etc. NIR Upconversion Luminescence of NaYF4:Yb3+,Tm3+/CdSe Nanoheterostructures[J]. Chinese Journal of Luminescence, 2015,36(5): 491-496
何光辉, 毕雪晴, 宋维业等. NaYF4:Yb3+,Tm3+/CdSe纳米异质结构的近红外上转换发光性能[J]. 发光学报, 2015,36(5): 491-496 DOI： 10.3788/fgxb20153605.0491.

HE Guang-hui, BI Xue-qing, SONG Wei-ye etc. NIR Upconversion Luminescence of NaYF4:Yb3+,Tm3+/CdSe Nanoheterostructures[J]. Chinese Journal of Luminescence, 2015,36(5): 491-496 DOI： 10.3788/fgxb20153605.0491.

摘要

采用两步高温热分解法合成了纳米异质结构的NaYF

:Yb

/CdSe。X射线衍射测试结果表明样品由纯六角相的NaYF

(-NaYF

)和纤锌矿型CdSe组成。980 nm激发的上转换光谱表明NaYF

:Yb

和CdSe之间存在能量传递

将Yb

传递给它的能量部分地传递给CdSe

被激发的CdSe又将能量回传给Tm

的相应能级

最终使得NaYF

:Yb

的紫外和蓝光发射完全消失

而797 nm的近红外发射大幅增强。NaYF

:Yb

/CdSe纳米异质结构的激发光和发射光均处于生物组织的光学透过窗口(700~1 100 nm)

对生物组织的光损伤小

在生物医学领域有很大的应用潜力。

Abstract

NaYF

:Yb

/CdSe nanoheterostructures with NIR-to-NIR upconversion luminescence were synthesized by a two-step improved wet-chemical method. X-ray diffraction (XRD) characterization shows that the nanoheterostructures are composed of both pure hexagonal phase NaYF

:Yb

and wurtzite phase CdSe. Upconversion emission spectra under the excitation of 980 nm near-infrared laser show that 797 nm emission from Tm

ions has been enhanced greatly

while neither ultraviolet nor blue emissions of Tm

appear compared with that of pure NaYF

:Yb

. It indicates that the energy transfer occurs between NaYF

:Yb

and CdSe. Under 980 nm excitation

the energy absorbed by Yb

ions transfers to Tm

ions

then transfers to CdSe partially

and finally the excited CdSe returns the energy back to the corresponding energy levels of Tm

. These processes lead to the quenching of UV and blue emissions and the enhancement of 797 nm emission of Tm

ions in the NaYF

:Yb

/CdSe nanoheterostructures. The excitation (980 nm) and emission (797 nm) are both located in the NIR spectral range (700-1 100 nm) that is referred as the "optical window" of biological tissues because of the minimum of light scattering and autofluorescence of tissue and a relatively large penetration depth. Therefore

the present NaYF

:Yb

/CdSe nanoheterostructures could have potential applications in biology and biomedicine fields.

关键词

Keywords

references

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