Synthesis and Luminescence Properties of CaGd2(MoO4)4:Eu3+,Bi3+ Red Phosphors

PU Yong; ZHAO Cong; JING Xiao-long; YU Hong; HAN Tao; ZHU Da-chuan

doi:10.3788/fgxb20183908.1045

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Synthesis and Luminescence Properties of CaGd₂(MoO₄)₄:Eu³⁺,Bi³⁺ Red Phosphors

更新时间：2020-08-12

- Synthesis and Luminescence Properties of CaGd₂(MoO₄)₄:Eu³⁺,Bi³⁺ Red Phosphors
- Chinese Journal of Luminescence Vol. 39, Issue 8, Pages: 1045-1050(2018)
- 作者机构：
  
  1. 四川大学材料科学与工程学院, 四川成都 610065
  2. 重庆市高校微纳米材料工程与技术重点实验室重庆文理学院新材料技术研究院, 重庆 402160
- 作者简介：
- 基金信息：
  
  Supported by Program of Chongqing Municipal Education Commission(KJ1501126);Nation
- DOI：10.3788/fgxb20183908.1045
  CLC： O482.31
- Received：16 November 2017，
  
  Revised：28 February 2018，
  
  Published Online：02 April 2018，
  
  Published：05 August 2018
- 稿件说明：
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蒲勇, 赵聪, 敬小龙等. CaGd2(MoO4)4:Eu3+,Bi3+红色荧光粉的制备及发光性能[J]. 发光学报, 2018,39(8): 1045-1050

PU Yong, ZHAO Cong, JING Xiao-long etc. Synthesis and Luminescence Properties of CaGd2(MoO4)4:Eu3+,Bi3+ Red Phosphors[J]. Chinese Journal of Luminescence, 2018,39(8): 1045-1050
蒲勇, 赵聪, 敬小龙等. CaGd2(MoO4)4:Eu3+,Bi3+红色荧光粉的制备及发光性能[J]. 发光学报, 2018,39(8): 1045-1050 DOI： 10.3788/fgxb20183908.1045.

PU Yong, ZHAO Cong, JING Xiao-long etc. Synthesis and Luminescence Properties of CaGd2(MoO4)4:Eu3+,Bi3+ Red Phosphors[J]. Chinese Journal of Luminescence, 2018,39(8): 1045-1050 DOI： 10.3788/fgxb20183908.1045.

摘要

采用水热法制备了CaGd

x-y

（MoO

）

：

，

（

=0.01~2，

=0~0.04）系列红色荧光粉。分别用XRD、SEM和荧光分光光度计对样品的晶体结构、微观形貌和发光性能进行了研究。结果表明，样品荧光粉具有体心四方白钨矿结构，属于I4

（88）空间群，15% Eu

和1% Bi

（摩尔分数）的相继掺杂对样品基质晶体结构影响不大。样品粉末颗粒呈类八面体状，粒度比较均一，分散性良好，粒径在3~5 m之间。样品的激发光谱由位于200~350 nm的激发宽带和位于350~550 nm的系列激发峰构成，最强激发峰位于396 nm。发射主峰位于617 nm，对应于Eu

的

特征跃迁发射。研究未发现Eu

的浓度猝灭现象。Bi

的掺杂能对Eu

起敏化作用，显著提高样品的红光发射和色纯度，其作用类型为交换交互型，最佳掺杂量

=0.01。

Abstract

A series of CaGd

x-y

(MoO

)

(

=0.01-2

=0-0.04) red phosphors were synthesized by a hydrothermal method. The crystal structure

microstructure and luminescent properties of the samples were studied by the use of XRD

SEM and FL spectrophotometer

respectively. The results reveal that the powders with the doping mole frsction of 15% Eu

and 1% Bi

hold the structure of body-centered quartet scheelite which belongs to the space groups of I4

(88). The particles of the sample are relatively uniform and the grain size is 3 to 5 m. The excitation spectra of the samples are made up of a wide excitation band between 200-350 nm and excitation peaks between 350-500 nm. The strongest excitation peak locates at 396 nm

which indicates the sample can be effectively excited by near-UV light. The strongest emission peak locates at 617 nm corresponding to the

transition of Eu

. The concentration quenching phenomenon of Eu

is not found in the present study. The dope of Bi

can sensitize Eu

to significantly improve the red emission intensity and the color purity of the sample. The best doping mole fraction of Bi

is 1%.

关键词

Keywords

references

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