Blue-emitting phosphor Ba4OCl6:Eu2+ with good thermal stability and a tiny chromaticity shift for white LEDs

被引：84

作者：

Chen, Yan ^{[1
]}

Pan, Fengjuan ^{[1
]}

Wang, Meng ^{[1
]}

Zhang, Xuejie ^{[1
]}

Wang, Jing ^{[1
]}

Wu, Mingmei ^{[1
]}

Wang, Chengxin ^{[1
]}

机构：

[1] Sun Yat Sen Univ, Sch Chem & Chem Engn, Sch Phys & Engn, State Key Lab Optoelect Mat & Technol, Guangzhou 510275, Guangdong, Peoples R China

来源：

JOURNAL OF MATERIALS CHEMISTRY C | 2016年 / 4卷 / 12期

基金：

中国博士后科学基金; 中国国家自然科学基金; 高等学校博士学科点专项科研基金;

关键词：

ENERGY-TRANSFER; LUMINESCENCE PROPERTIES; SILICATE GLASS; LIGHT; EU2+; IONS; TB3+;

D O I：

10.1039/c5tc02806j

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

An intense blue-emitting phosphor, Ba4OCl6:Eu2+, was developed by a solid state reaction at low synthesis temperature. The photoluminescence excitation and emission spectra, concentration effect, thermal-dependent luminescence quenching properties, chromaticity shift, activity energy and luminous efficiency of radiation are investigated. These results show that Eu2+ exhibits a broadband excitation extending from 250 to 400 nm and emits an intense blue light at 450 nm with a tiny colour chromaticity shift in the temperature range of 350-490 K. The external quantum efficiency of Ba3.97OCl6:Eu-0.03(2+) is about 26.6%. It demonstrates that Eu2+ doped Ba4OCl6 can be excited by an n-UV LED chip and is an effective blue-emitting phosphor potentially useful in white LEDs.

引用

页码：2367 / 2373

页数：7

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