Synthesis and spectroscopic properties of Eu2+-activated Ba2Zn7F18 phosphors

被引：6

作者：

Yu, Ruijin ^{[1
]}

Gao, Zhiwen ^{[1
]}

Deng, Huajuan ^{[1
]}

Jeong, Jung Hyun ^{[2
]}

机构：

[1] Northwest A&F Univ, Coll Chem & Pharm, Yangling 712100, Shaanxi, Peoples R China

[2] Pukyong Natl Univ, Dept Phys, Busan 608737, South Korea

来源：

JOURNAL OF LUMINESCENCE | 2017年 / 192卷

基金：

中国国家自然科学基金;

关键词：

Luminescence; Fluoride; Eu2+; Optical materials and properties; Scintillator; SCINTILLATION PROPERTIES; EU2+; LUMINESCENCE; TRANSITIONS; PHOTOLUMINESCENCE; ENERGY; MODEL; SR; CA;

D O I：

10.1016/j.jlumin.2017.08.004

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A new fluoride phosphor of Eu2+-activated Ba2Zn7F18 has been prepared via two-step solid-phase synthesis. Pure crystalline formation was verified by the X-ray diffraction (XRD) Rietveld refinement. The photoluminescence (PL) spectrum, decay curves (lifetimes), time-resolved emission, and internal quantum efficiency (QE) of Ba2Zn7F18:Eu2+ were characterized. The phosphors show sensitive response to near-UV excitation and emit blueish green luminescence with a maximum quantum efficiency of 70%. The excitation band can well match with the commercial near-UV LED chips (360-400 nm). This is favourable for fabricating white LED lighting devices. The scintillating properties were also confirmed under excitation of X-ray irradiation with a lifetime of 850 ns. Eu2+-activated Ba2Zn7F18 has a high thermal stability with activated energy of 0.63 eV. It could be potential for high-performance lighting and scintillator due to desirable luminescence properties.

引用

页码：794 / 800

页数：7

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