Luminescent Properties and Energy Transfer of La2-x-yMgTiO6: xDy3+,yEu3+ White Phosphors

XIE Hui-dong; TAN Yu-rong; SU Bin-bin; LI Jie; ZHAO Ya-juan

doi:10.3788/fgxb20194006.0713

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Luminescent Properties and Energy Transfer of La_2-x-yMgTiO₆: xDy³⁺,yEu³⁺ White Phosphors

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

- Luminescent Properties and Energy Transfer of La_2-x-yMgTiO₆: xDy³⁺,yEu³⁺ White Phosphors
- Chinese Journal of Luminescence Vol. 40, Issue 6, Pages: 713-718(2019)
- 作者机构：
  
  西安建筑科技大学理学院, 陕西西安 710055
- 作者简介：
- 基金信息：
  
  Supported by Shaanxi Natural Science Foundation(2018JM2022)
- DOI：10.3788/fgxb20194006.0713
  CLC： O614.33+1;O614.342
- Received：14 August 2018，
  
  Revised：22 October 2018，
  
  Published Online：05 November 2018，
  
  Published：05 June 2019
- 稿件说明：
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谢会东, 谭玉荣, 苏彬彬等. La2-x-yMgTiO6:xDy3+,yEu3+白色荧光粉的荧光性能及能量传递[J]. 发光学报, 2019,40(6): 713-718

XIE Hui-dong, TAN Yu-rong, SU Bin-bin etc. Luminescent Properties and Energy Transfer of La2-x-yMgTiO6: xDy3+,yEu3+ White Phosphors[J]. Chinese Journal of Luminescence, 2019,40(6): 713-718
谢会东, 谭玉荣, 苏彬彬等. La2-x-yMgTiO6:xDy3+,yEu3+白色荧光粉的荧光性能及能量传递[J]. 发光学报, 2019,40(6): 713-718 DOI： 10.3788/fgxb20194006.0713.

XIE Hui-dong, TAN Yu-rong, SU Bin-bin etc. Luminescent Properties and Energy Transfer of La2-x-yMgTiO6: xDy3+,yEu3+ White Phosphors[J]. Chinese Journal of Luminescence, 2019,40(6): 713-718 DOI： 10.3788/fgxb20194006.0713.

摘要

采用高温固相法合成了La

MgTiO

和La

x-y

MgTiO

，

系列荧光粉，通过X射线衍射对其相结构进行了表征，优化了荧光粉的组成，研究了Dy

和Eu

浓度对发光强度的影响，测试了荧光粉的荧光光谱和寿命，研究了Dy

和Eu

之间的能量传递机理和能量传递效率。结果表明:所有合成的掺杂荧光粉均为单相物质；La

MgTiO

最佳掺杂浓度为

=0.05；在350 nm近紫外光激发下，La

x-y

MgTiO

，

显示出Dy

的特征黄、蓝光发射和Eu

的特征红光发射；Dy

的荧光寿命呈双指数衰减，随着Eu

浓度的增大，Dy

的荧光寿命逐渐减小，证明了Dy

和Eu

离子之间存在着能量传递；能量传递效率随着Eu

掺杂浓度的增加而增加，La

1.83

MgTiO

:0.05Dy

，0.12Eu

荧光粉的能量传递效率为53.9%；改变调节Eu

的掺杂浓度可以得到从冷白色到暖白色的荧光粉，La

1.83

MgTiO

:0.05Dy

，0.12Eu

的色坐标为（0.337 3，0.354 4）。

Abstract

A series of La

MgTiO

and La

x-y

MgTiO

phosphors were synthesized by high temperature solid-state method. The phase of the products was determined by X-ray diffraction meter and the composition of the phosphors was optimized. The influence of the concentration of Dy

and Eu

on the luminescence intensity was studied. The fluorescence spectra and fluorescence lifetime of the phosphors were tested. The energy transfer mechanism and energy transfer efficiency between Dy

and Eu

were studied. The results showed that all the as-synthesized doped phosphors were of single phase. The optimum doping concentration of Dy

in La

MgTiO

was

=0.05. The La

x-y

MgTiO

phosphors exhibited yellow and blue emissions of Dy

and characteristic emissions of Eu

upon 350 nm near ultraviolet light excitation. The fluorescence lifetime decay of Dy

was double exponential and it decreased with the increase of the concentration of Eu

which showed the occurrence of an energy transfer between Dy

and Eu

. The energy transfer efficiency increased with the increase of the concentration of Eu

which was 53.9% for La

1.83

MgTiO

:0.05Dy

0.12Eu

. By adjusting the concentration of Dy

and Eu

the phosphor realized the emission from cold-white-light to warm-white-light. The chromaticity coordinates of La

1.83

MgTiO

:0.05Dy

0.12Eu

were (0.3373

0.3544).

关键词

Keywords

references

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