High Color Purity Blue Emitting Phosphors Gd2MgTiO6:Bi3+ for White Light Emitting Diodes:Synthesis and Luminescence Properties

Chang-yan JI; Shuang-yan XIAO; Zhong-sheng HUANG; Zhi HUANG; Jin WEN; Yang-xi PENG

doi:10.3788/fgxb20204105.0529

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High Color Purity Blue Emitting Phosphors Gd₂MgTiO₆:Bi³⁺ for White Light Emitting Diodes:Synthesis and Luminescence Properties

Synthesis and Properties of Materials | 更新时间：2020-09-21

- High Color Purity Blue Emitting Phosphors Gd₂MgTiO₆:Bi³⁺ for White Light Emitting Diodes:Synthesis and Luminescence Properties
- Chinese Journal of Luminescence Vol. 41, Issue 5, Pages: 529-535(2020)
- 作者机构：
  
  1.湖南人文科技学院材料与环境工程学院, 精细陶瓷与粉体材料湖南省重点实验室, 湖南娄底 417000
  2.国家电子陶瓷产品质量监督检验中心(湖南), 湖南娄底 417000
- 作者简介：
- 基金信息：
  
  Scientific Research Fund of Hunan Provincial Education Department;Open Foundation of
- DOI：10.3788/fgxb20204105.0529
  CLC： TQ174
- Received：19 February 2020，
  
  Accepted：06 March 2020，
  
  Published：2020-05
- 稿件说明：
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Chang-yan JI, Shuang-yan XIAO, Zhong-sheng HUANG, et al. High Color Purity Blue Emitting Phosphors Gd₂MgTiO₆:Bi³⁺ for White Light Emitting Diodes:Synthesis and Luminescence Properties[J]. Chinese journal of luminescence, 2020, 41(5): 529-535.
DOI：

Chang-yan JI, Shuang-yan XIAO, Zhong-sheng HUANG, et al. High Color Purity Blue Emitting Phosphors Gd₂MgTiO₆:Bi³⁺ for White Light Emitting Diodes:Synthesis and Luminescence Properties[J]. Chinese journal of luminescence, 2020, 41(5): 529-535. DOI： 10.3788/fgxb20204105.0529.

摘要

采用高温固相法合成了一系列蓝光荧光粉Gd

MgTiO

：

（0.002 5≤

≤0.015），并对样品的表面形貌、晶体结构、发光性能和热稳定性进行了探究。SEM测试结果显示，样品Gd

MgTiO

：Bi

的粒径分布范围大，颗粒尺寸在1~5 μm范围。XRD测试表明，Bi

成功掺杂进入基质Gd

MgTiO

中且无杂相产生。荧光光谱测试结果表明，在375 nm波长激发下，蓝光荧光粉Gd

MgTiO

：Bi

于385~500 nm波长范围内呈现出属于Bi

的

S0→

能级跃迁的窄带发射峰，且发射强度最大处位于418 nm，这有利于避免光的重吸收现象。不同掺杂浓度下样品的发射光谱研究表明，最佳Bi

掺杂浓度为

=0.007 5。此外，发光强度最佳的蓝光样品Gd

1.9925

MgTiO

：0.0075Bi

的CIE坐标为（0.162 9，0.036 4），位于蓝光区域，色纯度高达96.42%，平均荧光寿命高达11.29 ms。样品的热稳定性高于文献报道的同类样品。这些均说明该样品是一种发光性能和热稳定性能良好的W-LEDs用蓝光组分。

Abstract

A series of blue-emitting phosphors Gd

MgTiO

(0.002 5 ≤

≤ 0.015) were synthesized by high-temperature solid state method

and the corresponding morphology

crystal structure

photoluminescence properties and thermal stability were investigated. The scan electron microscope(SEM) test predicted that the samples Gd

MgTiO

:Bi

possessed a large particle size distribution with the particle size ranging from 1 μm to 5 μm. The X-ray diffraction (XRD) analysis showed that the Bi

ions successfully doped into host lattice Gd

MgTiO

with no other impurity phase existed. The photoluminescence properties stated that the blue emitting phosphors Gd

MgTiO

:Bi

presented a single narrow emission peak located at about 418 nm assigned to the

S0→

transition in the range from 385 nm to 500 nm in the excitation of 375 nm

which helped to avoid light reabsorption. Moreover

when the doping concentration of Bi

ions is 0.007 5

the emission intensity reaches the maximum. The sample Gd

1.9925

MgTiO

:0.0075Bi

with best photoluminescence properties exhibited a Commission Internationale De I'eclairage(CIE) coordinates of (0.162 9

0.036 4) in blue-light area with an impressive color purity up to 96.42% and an impressive average lifetime of 11.29 ms. In addition

the thermal stability of sample Gd

1.9925

MgTiO

:0.0075Bi

was relatively higher than that of similar blue-emitting phosphors in the literature. These results indicated that sample Gd

1.9925

MgTiO

:0.0075Bi

is a kind of blue-emitting component for W-LEDs with excellent luminescence and thermal stability.

关键词

Keywords

references

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