Luminescence properties of Eu-activated alkaline and alkaline-earth silicate Na2Ca3Si6O16

被引：14

作者：

Wang, Jing ^{[1
]}

Huang, Yanlin ^{[1
]}

Wang, Xigang ^{[1
]}

Qin, Lin ^{[1
]}

Seo, Hyo Jin ^{[2
,3
]}

机构：

[1] Soochow Univ, Coll Chem Chem Engn & Mat Sci, Suzhou 215123, Peoples R China

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

[3] Pukyong Natl Univ, Ctr Marine Integrated Biomed Technol, Pusan 608737, South Korea

来源：

MATERIALS RESEARCH BULLETIN | 2014年 / 55卷

基金：

新加坡国家研究基金会;

关键词：

Ceramics; Chemical synthesis; X-ray diffraction; Optical properties; BLUE-EMITTING PHOSPHOR; ENERGY-TRANSFER; PHOTOLUMINESCENCE PROPERTIES; GREEN; BARIUM; IONS; MN2+; SR; BA; CA;

D O I：

10.1016/j.materresbull.2014.04.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Yellow-emitting phosphors of Na2Ca3Si6O16:Eu2+ was prepared by wet chemistry sol-gel method. X-ray powder diffraction and SEM measurements were applied to characterize the structure and morphology, respectively. The luminescence properties were investigated by the photoluminescence excitation and emission spectra, decay curve (lifetimes), CIE coordinates and the internal quantum efficiencies. The excitation spectra can match well with the emission light of near UV-LED chips (360-400 nm). Na2Ca3Si6O16:Eu2+ presents a symmetric emission band from 4f(6)5d(1) -> 4f(7)(S-8(7/2)) transitions of Eu2+ ions on doping below 3.0 mol%. On increasing Eu-doping levels, the sample contains two kinds of emission centers, i.e., Eu2+ and Eu3+ ions, which present the characteristic broad band (5d -> 4f) and narrower (4f -> 4f) luminescence lines, respectively. The energy transfer, the luminescence thermal stability (activation energy Delta E for thermal quenching) and luminescence mechanism of Na2Ca3Si6O16:Eu2+ phosphors were discussed by analyzing the relationship between the luminescence characteristics and the crystal structure. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：126 / 130

页数：5