Preparation and Luminescence of Red Light-emitting Phosphors Based on Li3Ba2Ln3-xEux(MoO4)8 by Sol-gel Method

GAO Fei; LIANG Li-fang; GUO Chong-feng

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Preparation and Luminescence of Red Light-emitting Phosphors Based on Li₃Ba₂Ln_3-xEu_x(MoO₄)₈ by Sol-gel Method

paper | 更新时间：2020-08-12

- Preparation and Luminescence of Red Light-emitting Phosphors Based on Li₃Ba₂Ln_3-xEu_x(MoO₄)₈ by Sol-gel Method
- Chinese Journal of Luminescence Vol. 30, Issue 5, Pages: 610-616(2009)
- 作者机构：
  
  1. 广西师范学院化学系,广西南宁,530001
  2. 华中科技大学武汉光电国家实验室,湖北武汉,430074
  3. 常德职业技术学院,湖南常德,415000
- 作者简介：
- 基金信息：
- DOI：
  CLC： O482.31
- Received：15 January 2009，
  
  Revised：02 January 1900，
  
  Published Online：30 October 2009，
  
  Published：30 October 2009
- 稿件说明：
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GAO Fei, LIANG Li-fang, GUO Chong-feng. Preparation and Luminescence of Red Light-emitting Phosphors Based on Li₃Ba₂Ln_3-xEu_x(MoO₄)₈ by Sol-gel Method[J]. Chinese journal of luminescence, 2009, 30(5): 610-616.
DOI：

GAO Fei, LIANG Li-fang, GUO Chong-feng. Preparation and Luminescence of Red Light-emitting Phosphors Based on Li₃Ba₂Ln_3-xEu_x(MoO₄)₈ by Sol-gel Method[J]. Chinese journal of luminescence, 2009, 30(5): 610-616. DOI：

摘要

采用溶胶-凝胶法合成了发光二极管(LED)用的系列红色荧光粉Li

3-x

(MoO

)

(Ln=La

Y)。利用差热-热重(TG-DTA)分析和粉末X 射线衍射(XRD)测定了其最佳合成温度和不同温度下所得样品的结构

发现所有样品均具有单斜结构;采用荧光光谱对所得荧光粉发光性能进行了表征

发现在相同条件下所得样品的发光强度顺序为:Li

2.8

0.2

(MoO

)

＞Li

2.8

0.2

(MoO

)

＞Li

2.8

0.2

-(MoO

)

。它们在395 nm和465 nm的激发光源激发时均有强的吸收

与LED芯片发射波长相匹配。同时分析了柠檬酸及分散剂聚乙二醇(PEG-10000)的用量、Eu

离子的浓度以及焙烧温度等因素对荧光粉发光性能的影响。

Abstract

A novel red light-emitting phosphors of Li

3-x

(MoO

)

were synthesized by sol-gel method. According to X-ray diffraction

the materials belongs to monoclinic system.The structure and luminescent properties of these phosphors were investigated by emission and excitation spectra in details. The main emission peak of the samples is at 616 nm. Effect of the dosage of citric acid and polyethylene glycol and the activator concentration on the crystal structure

morphology and luminescent properties were investigated by using XRD

SEM. These results showed that this phosphor can be effectively excited by ultraviolet (UV) (395 nm) and blue (465 nm) light

matching the output wavelengths of ultraviolet or blue LED chips. Integrated emission intensity of Li

2.8

0.2

(MoO

)

is the strongest in the series of the Li

3-x

(MoO

)

(Ln=La

Y) phosphors. The Li

3-x

(MoO

)

(Ln=La

Y) phosphors might be a better candidate for solid state lighting application.

关键词

Keywords

references

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