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

被引：0

作者：

Ji C.-Y. ^{[1
]}

Xiao S.-Y. ^{[1
]}

Huang Z.-S. ^{[2
]}

Huang Z. ^{[2
]}

Wen J. ^{[2
]}

Peng Y.-X. ^{[1
]}

机构：

[1] Hunan Provincial Key Laboratory of Fine Ceramics and Powder Materials, School of Materials and Environmental Engineering, Hunan University of Humanities, Loudi

[2] National Electronic Ceramics Product Quality Supervision and Inspection Center(Hunan), Loudi

来源：

Faguang Xuebao/Chinese Journal of Luminescence | 2020年 / 41卷 / 05期

关键词：

Blue emitting phosphor; Gd[!sub]2[!/sub]MgTiO[!sub]6[!/sub]:Bi; High color purity; W-LEDs;

D O I：

10.3788/fgxb20204105.0529

中图分类号：

学科分类号：

摘要：

A series of blue-emitting phosphors Gd2-xMgTiO6:xBi3+(0.002 5≤x≤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 Gd2MgTiO6:Bi3+ 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 Bi3+ ions successfully doped into host lattice Gd2MgTiO6 with no other impurity phase existed. The photoluminescence properties stated that the blue emitting phosphors Gd2MgTiO6:Bi3+ presented a single narrow emission peak located at about 418 nm assigned to the 1S0→3P1 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 Bi3+ ions is 0.007 5, the emission intensity reaches the maximum. The sample Gd1.9925MgTiO6:0.0075Bi3+ 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 Gd1.9925MgTiO6:0.0075Bi3+ was relatively higher than that of similar blue-emitting phosphors in the literature. These results indicated that sample Gd1.9925MgTiO6:0.0075Bi3+ is a kind of blue-emitting component for W-LEDs with excellent luminescence and thermal stability. © 2020, Science Press. All right reserved.

引用

页码：529 / 535

页数：6

共 22 条

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