Preparation and Polychromatic Upconversion Luminescence of Hexagonal NaErF4 and NaErF4@NaYF4 Core-shell Particles

Jie CHEN; Yi-xin GAO; Chao WANG; Yu YIN; Yan-hua SONG; Xiao-dan ZENG; Hai-feng JIANG

doi:10.37188/CJL.20210373

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Preparation and Polychromatic Upconversion Luminescence of Hexagonal NaErF₄ and NaErF₄@NaYF₄ Core-shell Particles

Synthesis and Properties of Materials | 更新时间：2022-02-25

- Preparation and Polychromatic Upconversion Luminescence of Hexagonal NaErF₄ and NaErF₄@NaYF₄ Core-shell Particles
  增强出版
- Chinese Journal of Luminescence Vol. 43, Issue 2, Pages: 209-217(2022)
- 作者机构：
  
  1.吉林化工学院　分析测试中心，吉林　吉林　132022
  2.吉林大学　化学学院，吉林　长春　130012
  3.东北电力大学　能源与动力工程学院，吉林　吉林　132012
- 作者简介：
- 基金信息：
  
  Science and Technology Development Plan of Jilin Province(YDZJ202101ZYTS029);National Natural Science Foundation of China(51902125);Science and Technology Development Plan of Jilin City(20210103092)
- DOI：10.37188/CJL.20210373
  CLC： O614.33
- Published：2022-02，
  
  Received：24 November 2021，
  
  Revised：08 December 2021，
- 稿件说明：
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JIE CHEN, YI-XIN GAO, CHAO WANG, et al. Preparation and Polychromatic Upconversion Luminescence of Hexagonal NaErF₄ and NaErF₄@NaYF₄ Core-shell Particles. [J]. Chinese journal of luminescence, 2022, 43(2): 209-217.
DOI：

JIE CHEN, YI-XIN GAO, CHAO WANG, et al. Preparation and Polychromatic Upconversion Luminescence of Hexagonal NaErF₄ and NaErF₄@NaYF₄ Core-shell Particles. [J]. Chinese journal of luminescence, 2022, 43(2): 209-217. DOI： 10.37188/CJL.20210373.

摘要

采用简单的水热法合成了六角柱形NaErF

和NaErF

@NaYF

核壳上转换发光材料，利用扫描电镜(SEM)、X射线粉末衍射(XRD)和荧光光谱(PL)等表征对材料的形貌、结构和上转换发光性能进行了研究。结果表明，纯NaErF

样品为六角柱形，边长和厚度均为1 μm左右，样品表面光滑。随着NaYF

壳层的包覆，六角相NaErF

周围出现了大量的立方相NaYF

纳米颗粒，得到了NaErF

@NaYF

核壳结构。荧光光谱表明，通过在六角柱形NaErF

表面包覆NaYF

壳层，可以有效增强上转换发光强度，其中，位于527

543

663 nm处的3个发射峰分别对应于Er

的

11/2

→

15/2

、

3/2

→

15/2

和

9/2

→

15/2

能级跃迁。随着壳层中Y∶F比例的增加，立方相NaYF

的晶体衍射峰逐渐增强；同时，对应的NaErF

@NaYF

样品发射光谱中红绿比(

R/G

)逐渐增大，发光颜色也从绿色、经黄绿色逐渐向黄色过渡，实现了多色发光。

Abstract

Hexagonal NaErF

and NaErF

@NaYF

core-shell upconversion luminescent materials were synthesized by simple hydrothermal method. The morphology

structure and upconversion luminescence properties of the obtained materials were studied by scanning electron microscopy(SEM)

X-ray powder diffraction(XRD) and fluorescence spectroscopy(PL). The results show that the pure NaErF

sample has hexagonal column morphology with smooth surface

and the side length and thickness are both 1 μm. With the coating of NaYF

shell

a large number of cubic NaYF

nanoparticles appeared around hexagonal NaYF

particles

and the NaErF

@NaYF

core-shell materials were obtained. The luminescence spectra show that the upconversion luminescence intensity can be effectively enhanced by coating NaYF

shell on the surface of hexagonal NaErF

. The three emission peaks at 527

543

663 nm correspond to

11/2

→

15/2

3/2

→

15/2

and

9/2

→

15/2

energy level transitions of Er

respectively. Meanwhile

with the increase of the molar ratio of Y∶F in the shell of NaErF

@NaYF

sample

the crystal diffraction peak of cubic NaYF

increases gradually

moreover

the red green ratio(

R/G

) gradually increases in the emission spectrum of the sample

and the luminescence color gradually transits from green to yellow

realizing multi-color luminescence.

关键词

上转换荧光NaErF4@NaYF4；红绿比六角柱

Keywords

upconversion luminescenceNaErF4@NaYF4red green ratiohexagonal column

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