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高温退火对GdF3:Yb3+,Er3+晶型的转变及上转换发光性能的影响
Structure Change of GdF3:Yb3+,Er3+ and Influence on Properties of Upconversion Luminescence by High Temperature Annealing
- 发光学报 2019年40卷第4期 页码：447-452
- 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：海南省研究生创新科研课题（Hys2018-52）;海南省国际科技合作重点项目计划（ZDYF2016212）资助项目
DOI：10.3788/fgxb20194004.0447
中图分类号： O482.31纸质出版日期：2019-4-5，
网络出版日期：2018-8-30，
收稿日期：2018-5-25，
修回日期：2018-8-1，
扫 描 看 全 文
李知来, 刘钟馨, 冯婷等. 高温退火对GdF<sub>3</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup>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 GdF<sub>3</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup> 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GdF<sub>3</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup>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 GdF<sub>3</sub>:Yb<sup>3+</sup>,Er<sup>3+</sup> 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
3
:Yb
3+
，Er
3+
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
3
:Yb
3+
，Er
3+
晶型在740.15℃转变为立方相NaGdF
4
:Yb
3+
，Er
3+
，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
3
:Yb
3+
，Er
3+
晶型转变为立方相NaGdF
4
:Yb
3+
，Er
3+
晶型均能提高颗粒上转换发光能。
Abstract
The cubic phase GdF
3
:Yb
3+
Er
3+
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
4
:Yb
3+
Er
3+
crystals from GdF
3
:Yb
3+
Er
3+
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
3
:Yb
3+
Er
3+
to NaGdF
4
:Yb
3+
Er
3+
particles.
关键词
共沉淀法上转换发光GdF3稀土离子
Keywords
co-precipitation methodupconversion luminescenceGdF3rare earth ions
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