Enhanced luminescence and afterglow by heat-treatment in reducing atmosphere to synthesize the Gd3Al2Ga3O12: Ce3+ persistent phosphor for AC-LEDs

被引：25

作者：

Liu, Pu ^{[1
,2
]}

Liu, Yongfu ^{[2
]}

Cui, Cai'e ^{[1
]}

Wang, Lei ^{[1
]}

Qiao, Jianwei ^{[1
,2
]}

Huang, Ping ^{[1
]}

Shi, Qiufeng ^{[1
]}

Tian, Yue ^{[1
]}

Jiang, Haochuan ^{[2
]}

Jiang, Jun ^{[2
]}

机构：

[1] Taiyuan Univ Technol, Coll Phys & Optoelect, Taiyuan 030024, Shanxi, Peoples R China

[2] Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Zhejiang, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2018年 / 731卷

基金：

中国国家自然科学基金;

关键词：

GAGG:Ce3+; Persistent phosphor; Flicker; AC-LED; SOLID-STATE REACTION; GREEN PHOSPHOR; PHOTOLUMINESCENCE; PERFORMANCE; PROPERTY; GLOW; BAND;

D O I：

10.1016/j.jallcom.2017.10.037

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Yellow-emitting persistent phosphor Gd3Al2Ga3O12:Ce3+ (GAGG:Ce3+) was synthesized by two-step solid-state reactions. The phase evolution, luminescence, persistent luminescence, and thermal stabilities of GAGG:Ce3+ sintered in an O-2 atmosphere and annealed in a CO reducing atmosphere at different temperatures were investigated. Comparing with the samples sintered only in O-2, the samples annealed in CO show higher luminescence and afterglow and better thermal stability. Under 445 nm excitation, the luminescence and afterglow of GAGG:Ce3+ are similar with each other, displaying a broad yellow emission with a peak around 545 nm. By optimizing the sintering process, the internal quantum efficiency can reach as high as 71.3%. The time tau(80) is about 15 ms, which is much longer than 0.4 ms required for alternating current (AC)-LEDs. These results indicate the promising application of the GAGG:Ce3+ persistent phosphor for reducing flicker from AC-LEDs. (C) 2017 Elsevier B.V. All rights reserved.

引用

页码：389 / 396

页数：8

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