Synthesis and Luminescent Properties of Eu3+-activated Novel Borate-based Red-emitting Phosphors for White LED

LIU Li; YUAN Xi-ming; XIE An; YANG Ming; CHEN Feng

doi:10.3788/fgxb20113207.0686

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Synthesis and Luminescent Properties of Eu³⁺-activated Novel Borate-based Red-emitting Phosphors for White LED

paper | 更新时间：2020-08-12

- Synthesis and Luminescent Properties of Eu³⁺-activated Novel Borate-based Red-emitting Phosphors for White LED
- Chinese Journal of Luminescence Vol. 32, Issue 7, Pages: 686-692(2011)
- 作者机构：
  
  1. 中国地质大学(武汉) 教育部纳米矿物材料与应用工程研究中心,湖北武汉,430074
  2. 厦门理工学院机械工程系,福建厦门,361024
  3. 中国地质大学(武汉) 可持续能源实验室,湖北武汉,430074
- 作者简介：
- 基金信息：
- DOI：10.3788/fgxb20113207.0686
  CLC： O482.31
- Received：10 January 2011，
  
  Revised：24 March 2011，
  
  Published Online：22 July 2011，
  
  Published：22 July 2011
- 稿件说明：
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刘丽, 袁曦明, 谢安, 杨明, 陈凤. Eu3+ 激活硼酸盐基质新型红色荧光粉的制备及发光性能[J]. 发光学报, 2011,32(7): 686-692

LIU Li, YUAN Xi-ming, XIE An, YANG Ming, CHEN Feng. Synthesis and Luminescent Properties of Eu3+-activated Novel Borate-based Red-emitting Phosphors for White LED[J]. Chinese Journal of Luminescence, 2011,32(7): 686-692
刘丽, 袁曦明, 谢安, 杨明, 陈凤. Eu3+ 激活硼酸盐基质新型红色荧光粉的制备及发光性能[J]. 发光学报, 2011,32(7): 686-692 DOI： 10.3788/fgxb20113207.0686.

LIU Li, YUAN Xi-ming, XIE An, YANG Ming, CHEN Feng. Synthesis and Luminescent Properties of Eu3+-activated Novel Borate-based Red-emitting Phosphors for White LED[J]. Chinese Journal of Luminescence, 2011,32(7): 686-692 DOI： 10.3788/fgxb20113207.0686.

摘要

采用传统高温固相反应法制备了一种新的白光LED用红色荧光粉LiLa

∶ Eu

并对其晶体结构及发光性能进行了系统研究。XRD分析证实LiLa

晶体能够稳定存在

并利用Le Bail模型计算得到其晶胞参数。荧光光谱证实:Eu

离子在LiLa

晶体中占据非反演对称中心格位

该系列荧光粉在紫外(396 nm)和蓝光(466 nm)激发下均表现为613 nm和623 nm的较强发射

是一种可广泛适用于蓝光和近紫外光LED的红色荧光粉。进一步的研究发现:引入适量Si

取代部分基质B

可有效的提高荧光粉的相对发光强度

使其色坐标更接近NTSC标准(

x=0.670

y=0.330)。

Abstract

A series of novel red phosphors LiLa

∶ Eu

were synthesized by conventional solid state reaction method using H

(99.5%)

(99.99%)

(99.99%) and Li

(97.0%) with different Eu

concentrations. The crystal structure and spectral features of the phosphors were characterized by XRD

excitation and emission spectra

respectively. The XRD pattern result indicates that the LiLa

crystals are stably existed.The lattice parameters were calculated by the Le Bail model method. We can also conclude from XRD patterns that unknown phases are formed with higher concentration Eu

doping. The excitation spectrum data demonstrate that these phosphors could be effectively excited by ultraviolet (UV) (396 nm) and blue (466 nm) light

which represent highly future prospects in both ultraviolet and blue light emitting diodes (LED) chips. Due to the

transition of Eu

the phosphors have best emission spectrum performance of 613 nm and 623 nm

illustrating Eu

occupy the non-centrosymmetric lattice site in LiLa

phases. The optimal doping concentration of Eu

was 20%. Our further research indicates the luminescent intensity increases significantly by doping optimal concentration of Si

ions. The CIE chromaticity coordinates are much closer to the standard of NTSC(

x=0.670

=0.330) by partly replacement of B

by Si

ions.

关键词

Keywords

references

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