Preparation and Upconversion Luminescence of Er3+/Yb3+ Codoped KLaF4 Nanocrystals

LAI Wen-bin; ZHOU Hai-fang; CHENG Shu-ying; LAI Yun-feng

doi:10.3788/fgxb20133410.1259

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Preparation and Upconversion Luminescence of Er³⁺/Yb³⁺ Codoped KLaF₄ Nanocrystals

更新时间：2020-08-12

- Preparation and Upconversion Luminescence of Er³⁺/Yb³⁺ Codoped KLaF₄ Nanocrystals
- Chinese Journal of Luminescence Vol. 34, Issue 10, Pages: 1259-1263(2013)
- 作者机构：
  
  福州大学物理与信息工程学院微纳器件与太阳能电池研究所, 福建福州 350108
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20133410.1259
  CLC： O482.31
- Received：09 June 2013，
  
  Revised：10 July 2013，
  
  Published：10 October 2013
- 稿件说明：
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赖文彬, 周海芳, 程树英, 赖云锋. Er3+/Yb3+共掺KLaF4纳米晶的制备和上转换发光[J]. 发光学报, 2013,34(10): 1259-1263

LAI Wen-bin, ZHOU Hai-fang, CHENG Shu-ying, LAI Yun-feng. Preparation and Upconversion Luminescence of Er3+/Yb3+ Codoped KLaF4 Nanocrystals[J]. Chinese Journal of Luminescence, 2013,34(10): 1259-1263
赖文彬, 周海芳, 程树英, 赖云锋. Er3+/Yb3+共掺KLaF4纳米晶的制备和上转换发光[J]. 发光学报, 2013,34(10): 1259-1263 DOI： 10.3788/fgxb20133410.1259.

LAI Wen-bin, ZHOU Hai-fang, CHENG Shu-ying, LAI Yun-feng. Preparation and Upconversion Luminescence of Er3+/Yb3+ Codoped KLaF4 Nanocrystals[J]. Chinese Journal of Luminescence, 2013,34(10): 1259-1263 DOI： 10.3788/fgxb20133410.1259.

摘要

用水热法成功制备了Er

/Yb

共掺不同浓度比的KLaF

纳米晶

并在300℃氩气气氛下退火。利用X射线衍射谱(XRD)、透射电子显微镜(TEM)对样品的晶体结构和形貌进行了表征。测量了样品漫反射谱、980 nm 激发下的上转换发射光谱和

11/2

能级的荧光寿命。研究结果表明:制备得到的样品为六方相的纳米棒

退火后纳米棒平均直径为28 nm

长为130 nm;在Er

浓度一定的情况下

提高Yb

掺杂量有利于增强973 nm 附近光的吸收;980 nm 的近红外光可上转换为较强的绿光和红光

且红绿光强度和

11/2

能级的平均荧光寿命均会随着Yb

掺杂浓度的增加而下降。

Abstract

KLaF

nanocrystals (NCs) co-doped with 2%Er

(fixed) and varied Yb

doping mole fractions (10%

14%

18%) were synthesized by hydrothermal method. The samples were annealed in argon at 300℃ for 1.5 h.The crystal structure and morphology of the samples were confirmed by X-ray diffraction (XRD) and transmission electron microscopy (TEM)

respectively. The optical properties of the samples were evaluated by diffuse reflectance spectra and up-conversion photoluminescence spectroscopy with the average fluorescent lifetimes of

11/2

level under laser excitation at 980 nm. The results show hexagonal KLaF

: Er

NCs are successfully obtained

which have a longitude of about 130 nm and a diameter of 28 nm for the annealed sample. The diffuse reflection spectra indicate that the absorbtion at around 973 nm is enhanced with the increase of Yb

mole fraction while Er

mole fraction is fixed. The near-infrared light at 980 nm can be up-converted to green and red light. Furthermore

both the intensities of the red and green light and the average fluorescence lifetimes for

11/2

level were decreased with the increase of Yb

ion concentration in KLaF

: Er

NCs. In addition

the effect of Yb

doping concertration on the intensity of up-conversion luminescence and the average fluorescence lifetimes for

11/2

level were briefly clarified.

关键词

Keywords

references

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