Origin of Red Emission in NaYF4:Yb3+,Er3+ Lanthanides Doped Upconversion Nanosystem

doi:10.3788/fgxb20153606.0623

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Origin of Red Emission in NaYF₄:Yb³⁺,Er³⁺ Lanthanides Doped Upconversion Nanosystem

更新时间：2020-08-12

- Origin of Red Emission in NaYF₄:Yb³⁺,Er³⁺ Lanthanides Doped Upconversion Nanosystem
- Chinese Journal of Luminescence Vol. 36, Issue 6, Pages: 623-627(2015)
- 作者机构：
  
  1. 发光学及应用国家重点实验室中国科学院长春光学精密机械与物理研究所,吉林长春,130033
  2. 中国科学院大学北京,100049
  3. 机械科学研究总院北京,100044
  4. 吉林大学第一临床医院,吉林长春,130021
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20153606.0623
  CLC： O482.31
- Received：04 March 2015，
  
  Revised：26 March 2015，
  
  Published：03 June 2015
- 稿件说明：
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吴飞, 海鹰, 孔祥贵等. NaYF4:Yb3+,Er3+上转换荧光纳米体系的红光来源[J]. 发光学报, 2015,36(6): 623-627

WU Fei, HAI Ying, KONG Xiang-gui etc. Origin of Red Emission in NaYF4:Yb3+,Er3+ Lanthanides Doped Upconversion Nanosystem[J]. Chinese Journal of Luminescence, 2015,36(6): 623-627
吴飞, 海鹰, 孔祥贵等. NaYF4:Yb3+,Er3+上转换荧光纳米体系的红光来源[J]. 发光学报, 2015,36(6): 623-627 DOI： 10.3788/fgxb20153606.0623.

WU Fei, HAI Ying, KONG Xiang-gui etc. Origin of Red Emission in NaYF4:Yb3+,Er3+ Lanthanides Doped Upconversion Nanosystem[J]. Chinese Journal of Luminescence, 2015,36(6): 623-627 DOI： 10.3788/fgxb20153606.0623.

摘要

对NaYF

:Yb

纳米材料的发光强度与激发光功率的依赖关系进行了研究

分析了NaYF

:Yb

裸核纳米体系及其核包壳纳米体系的上转换红光真实来源。结果表明:核包壳的纳米体系完全不同于裸核纳米体系

交叉弛豫对于NaYF

:Yb

纳米体系的上转换红光发射起主导作用

而多声子弛豫过程几乎可以忽略。这个结果对于提高上转换发光纳米材料的上转换效率、调控各发光带之间的相对强度和实现上转换发光的单色性具有重要的指导意义。

Abstract

In order to research the origin of red emission in NaYF

:Yb

upconversion nanoparticles

the dependence of upconversion fluorescence intensity on the excitation power was studied in this paper. The bare core and core/shell NaYF

:Yb

nanoparticles were synthesized

and their emission spectra were analyzed in detail. It is found that the cross-relaxation has great influence on the red emission in NaYF

:Yb

upconversion nanoparticles. Different from bare core NaYF

:Yb

nanoparticles

the cross-relaxation plays a leading role for the red emission in core/shell NaYF

:Yb

nanoparticles

and the multi-photon relaxation can be almost ignored.

关键词

Keywords

references

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Vetrone F, Naccache R, Mahalingam V, et al. The active-core/active-shell approach: A strategy to enhance the upconversion luminescence in lanthanide-doped nanoparticles [J]. Adv. Funct. Mater., 2009, 19(18):2924-2929.

Wang Y, Liu K, Liu X M, et al. Critical shell thickness of core/shell upconversion luminescence nanoplatform for FRET application [J]. J. Phys. Chem. Lett., 2011, 2(17):2083-2088.

Mai H X, Zhang Y W, Sun L D, et al. Size-and phase-controlled synthesis of monodisperse NaYF4:Yb,Er nanocrystals from a unique delayed nucleation pathway monitored with upconversion spectroscopy [J]. J. Phys. Chem. C, 2007, 111(37):13730-13739.

Pollnau M, Gamelin D R, Luthi S R, et al. Power dependence of upconversion luminescence in lanthanide and transition-metal-ion systems [J]. Phys. Rev. B, 2000, 61(5):3337-3346.

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