Structure Change of GdF3:Yb3+,Er3+ and Influence on Properties of Upconversion Luminescence by High Temperature Annealing

LI Zhi-lai; LIU Zhong-xin; FENG Ting; HUANG Jin

doi:10.3788/fgxb20194004.0447

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Structure Change of GdF₃:Yb³⁺,Er³⁺ and Influence on Properties of Upconversion Luminescence by High Temperature Annealing

Synthesis and Properties of Materials | 更新时间：2020-08-12

- Structure Change of GdF₃:Yb³⁺,Er³⁺ and Influence on Properties of Upconversion Luminescence by High Temperature Annealing
- Chinese Journal of Luminescence Vol. 40, Issue 4, Pages: 447-452(2019)
- 作者机构：
  
  海南大学热带岛屿资源先进材料教育部重点实验室,海南海口,570228
- 作者简介：
- 基金信息：
  
  Supported by Innovative Project of Hainan Province(Hys2018-52);International Joint Project of Hainan Province(ZDYF2016212)
- DOI：10.3788/fgxb20194004.0447
  CLC： O482.31
- Received：25 May 2018，
  
  Revised：01 August 2018，
  
  Published Online：30 August 2018，
  
  Published：05 April 2019
- 稿件说明：
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李知来, 刘钟馨, 冯婷等. 高温退火对GdF3:Yb3+,Er3+晶型的转变及上转换发光性能的影响[J]. 发光学报, 2019,40(4): 447-452

LI Zhi-lai, LIU Zhong-xin, FENG Ting etc. Structure Change of GdF3:Yb3+,Er3+ and Influence on Properties of Upconversion Luminescence by High Temperature Annealing[J]. Chinese Journal of Luminescence, 2019,40(4): 447-452
李知来, 刘钟馨, 冯婷等. 高温退火对GdF3:Yb3+,Er3+晶型的转变及上转换发光性能的影响[J]. 发光学报, 2019,40(4): 447-452 DOI： 10.3788/fgxb20194004.0447.

LI Zhi-lai, LIU Zhong-xin, FENG Ting etc. Structure Change of GdF3:Yb3+,Er3+ and Influence on Properties of Upconversion Luminescence by High Temperature Annealing[J]. Chinese Journal of Luminescence, 2019,40(4): 447-452 DOI： 10.3788/fgxb20194004.0447.

摘要

采用共沉淀法制备了立方相GdF

:Yb

，Er

颗粒，并对其进行不同温度的退火处理。通过XRD、SEM、TG-DSC以及PL等分析了不同温度退火对颗粒的形貌、尺寸、晶体结构及上转换发光性能的影响。研究结果表明，立方相GdF

:Yb

，Er

晶型在740.15℃转变为立方相NaGdF

:Yb

，Er

，相比于未经过退火处理的样品，在980 nm红外光激发下，高温退火后能有效提高发光性能，并且随着温度的提高呈现先升后降趋势，在800℃达到最大值，红绿光比例（R/G）由0.09上升到4.55。借助能级跃迁模型，分析认为随着退火温度升高，颗粒团聚致使粒径尺寸由100~300 nm增加到5~8 m、晶体结晶度提高、高温下由立方相GdF

:Yb

，Er

晶型转变为立方相NaGdF

:Yb

，Er

晶型均能提高颗粒上转换发光能。

Abstract

The cubic phase GdF

:Yb

was synthesized by co-precipitation method and annealed at different temperatures. SEM

XRD

thermogravimetric analysis and photoluminescence (PL) were introduced to investigate the effect of the morphology

crystal structure and upconversion (UC) luminescence properties after being annealed. The results suggest that the translation temperature of NaGdF

:Yb

crystals from GdF

:Yb

crystals was 740.15℃. The properties of UC luminescence are stronger comparing with the unsintered samples. Under 980 nm excitation

the UC luminescence intensity firstly increases and then decreases as the rise of temperature

it reaches the maximum value at 800℃ and the intensity ratio of red/green(R/G) rises from 0.09 to 4.55. With the discussion of UC luminescence transition mechanisms

the properties of UC luminescence could be enhanced due to following factors:with the rise of temperature

the particle size increased from 100-300 nm to 5-8 m because of the particle agglomeration

the improvement of crystallization and a structure change of cubic GdF

:Yb

to NaGdF

:Yb

particles.

关键词

Keywords

references

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