Design, synthesis and characterization of a novel yellow long-persistent phosphor: Ca2BO3Cl:Eu2+,Dy3+

被引：170

作者：

Zeng, Wei ^{[1
]}

Wang, Yuhua ^{[1
]}

Han, Shaochun ^{[1
]}

Chen, Wenbo ^{[1
]}

Li, Gen ^{[1
]}

Wang, Yanzhao ^{[1
]}

Wen, Yan ^{[1
]}

机构：

[1] Lanzhou Univ, Dept Mat Sci, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2013年 / 1卷 / 17期

基金：

美国国家科学基金会;

关键词：

LUMINESCENT PROPERTIES; LASTING PHOSPHORESCENCE; ENERGY-TRANSFER; DY3+; RED; EU2+; THERMOLUMINESCENCE; SR2MGSI2O7; MECHANISM; IONS;

D O I：

10.1039/c3tc30182f

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A novel yellow emitting long-persistent phosphor Ca2BO3Cl:Eu2+, Dy3+ is developed. The incorporation of Dy3+ ions, which act as trap centers, largely extends the thermoluminescence characteristics and evidently enhances the persistent luminescence behavior of the phosphor. Both fluorescence and phosphorescence spectra of Ca2BO3Cl:Eu2+, Dy3+ reveal only one asymmetric broad emission band located at 580 nm, ascribed to the 5d-4f transitions of Eu2+ ions in two different sites. With the optimum doping concentration and sufficient excitation with UV light, the afterglow of samples can persist over 48 h above the recognizable intensity level (>= 0.32 mcd m(-2)), a phenomenon that is infrequent and excellent. Furthermore, Ca2BO3Cl possesses an indirect bandgap of about 5.1 eV. Detailed processes and possible mechanism are studied and discussed.

引用

页码：3004 / 3011

页数：8

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