Correlation of Structure, Tunable Colors, and Lifetimes of (Sr, Ca, Ba)Al2O4:Eu2+, Dy3+ Phosphors

被引：11

作者：

Xie, Qidi ^{[1
]}

Li, Bowen ^{[1
,2
]}

He, Xin ^{[1
]}

Zhang, Mei ^{[1
]}

Chen, Yan ^{[1
]}

Zeng, Qingguang ^{[1
]}

机构：

[1] Wuyi Univ, Sch Appl Phys & Mat, Jiangmen 529020, Peoples R China

[2] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China

来源：

MATERIALS | 2017年 / 10卷 / 10期

关键词：

phosphors; solid solution; average lifetime; AC-LEDs; photoluminescence; LUMINESCENCE PROPERTIES; GREEN PHOSPHOR; AC-LEDS; SRAL2O4EU2+; MECHANOLUMINESCENCE; REDUCTION; EU2+;

D O I：

10.3390/ma10101198

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：

(Sr, Ca, Ba)Al2O4:Eu2+, Dy3+ phosphors were prepared via a high temperature solid-state reaction method. The correlation of phase structure, optical properties and lifetimes of the phosphors are investigated in this work. For the (Sr, Ca)Al2O4:Eu2+, Dy3+ phosphors, the different phase formation from monoclinic SrAl2O4 phase to hexagonal SrAl2O4 phase to monoclinic CaAl2O4 phase was observed when the Ca content increased. The emission color of SrAl2O4:Eu2+, Dy3+ phosphors varied from green to blue. For the (Sr, Ba)Al2O4:Eu2+, Dy3+ phosphors, different phase formation from the monoclinic SrAl2O4 phase to the hexagonal BaAl2O4 phase was observed, along with a shift of emission wavelength from 520 nm to 500 nm. More interestingly, the decay time of SrAl2O4:Eu2+, Dy3+ changed due to the different phase formations. Lifetime can be dramatically shortened by the substitution of Sr2+ with Ba2+ cations, resulting in improving the performance of the alternating current light emitting diode (AC-LED). Finally, intense LEDs are successfully obtained by combining these phosphors with Ga(In)N near UV chips.

引用

页数：12

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