Improved Luminescence Properties of Ca0.8Zn0.2TiO3:Pr3+ Phosphors Doped with Si and Lu

LI Jin-yin; PENG Zhi-xiong; YU Li-ping; ZHANG Ji-lin; ZHOU Wen-li; QIU Zhong-xian; LI Chen

doi:10.3788/fgxb20183905.0643

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Improved Luminescence Properties of Ca_0.8Zn_0.2TiO₃:Pr³⁺ Phosphors Doped with Si and Lu

更新时间：2020-08-12

- Improved Luminescence Properties of Ca_0.8Zn_0.2TiO₃:Pr³⁺ Phosphors Doped with Si and Lu
- Chinese Journal of Luminescence Vol. 39, Issue 5, Pages: 643-652(2018)
- 作者机构：
  
  湖南师范大学化学化工学院资源精细化与先进材料湖南省高校重点实验室,湖南长沙,410081
- 作者简介：
- 基金信息：
  
  Supported by National Natural Science Foundation of China (21471055);Natural Scien
- DOI：10.3788/fgxb20183905.0643
  CLC： O482.31
- Received：18 August 2017，
  
  Revised：24 October 2017，
  
  Published Online：23 November 2017，
  
  Published：05 May 2018
- 稿件说明：
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李金银, 彭志雄, 余丽萍等. Si,Lu掺杂Ca0.8Zn0.2TiO3:Pr3+荧光粉的光学性能改善[J]. 发光学报, 2018,39(5): 643-652

LI Jin-yin, PENG Zhi-xiong, YU Li-ping etc. Improved Luminescence Properties of Ca0.8Zn0.2TiO3:Pr3+ Phosphors Doped with Si and Lu[J]. Chinese Journal of Luminescence, 2018,39(5): 643-652
李金银, 彭志雄, 余丽萍等. Si,Lu掺杂Ca0.8Zn0.2TiO3:Pr3+荧光粉的光学性能改善[J]. 发光学报, 2018,39(5): 643-652 DOI： 10.3788/fgxb20183905.0643.

LI Jin-yin, PENG Zhi-xiong, YU Li-ping etc. Improved Luminescence Properties of Ca0.8Zn0.2TiO3:Pr3+ Phosphors Doped with Si and Lu[J]. Chinese Journal of Luminescence, 2018,39(5): 643-652 DOI： 10.3788/fgxb20183905.0643.

摘要

采用高温固相法合成Ca

0.8

0.2

TiO

：0.2% Pr

，Si

和Ca

0.8

0.2

TiO

：0.2% Pr

，Si

，Lu

荧光粉。通过X射线衍射仪、电子顺磁共振光谱仪、显微拉曼光谱仪和荧光光谱仪等表征了该系列荧光粉的物相组成、微观结构和发光性质。结果表明，以-Si

为硅源制备的荧光粉具有最佳的光学性能。加入ZnO后，荧光粉由CaTiO

、Zn

TiO

和Ca

三相组成，其中CaTiO

为主相。电子顺磁共振谱证实了Pr

存在，Lu

的添加使[Pr

]

簇显著增加，电子顺磁共振谱和拉曼光谱均证实Si

、Lu

的掺杂使局部TiO

簇对称性提高，有利于Pr

发光中心的能量传递。在336 nm激发下，荧光粉展示了很强的位于612 nm的红光发射（归属于Pr

的

跃迁）及理想的红光色坐标（x=0.670，y=0.330）。Si

和Lu

的添加显著增强了370 nm激发下红光发射，Ca

0.8

0.2

TiO

：0.2% Pr

，3.2% Si

荧光粉的余辉寿命最长。

Abstract

0.8

0.2

TiO

:0.2%Pr

and Ca

0.8

0.2

TiO

:0.2%Pr

phosphors were synthesized by high temperature solid-state method. Crystalline phase

microstructure and luminescence properties of phosphors were characterized with X-ray diffractometer (XRD)

electron paramagnetic resonance spectrometer (EPR)

microscopic Raman spectrometer and photoluminescence spectrometer

respectively. The results show that phosphor prepared using -Si

as Si source has the optimal luminescence properties. Phosphors with the addition of ZnO were confirmed to be constituted of CaTiO

TiO

and Ca

and CaTiO

is major phase. EPR spectra confirm that the presence of Pr

and[Pr

]

clusters remarkably increase with the Lu

addition. Increasing local symmetry of TiO

clusters with the addition of Si

and Lu

is verified by EPR and Raman spectra

which is beneficial for the energy transfer of luminescent center Pr

. The obtained phosphor exhibited the intense red emission centered at 612 nm (originated from

transition of Pr

) with an ideal chromaticity coordinate located at (x=0.670

y=0.330) under 336 nm excitation. Red emission excited by 370 nm remarkably increases with the addition of Si

and Lu

. The synthetic Ca

0.8

0.2

TiO

:0.2%Pr

3.2%Si

phosphor has the longest average lifetime.

关键词

Keywords

references

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