Spectroscopic properties of Eu3+ :KLa(WO4)2 novel red phosphors

被引：59

作者：

Rasu, K. Kavi ^{[1
]}

Balaji, D. ^{[1
]}

Babu, S. Moorthy ^{[1
]}

机构：

[1] Anna Univ, Ctr Crystal Growth, Madras 600025, Tamil Nadu, India

来源：

JOURNAL OF LUMINESCENCE | 2016年 / 170卷

关键词：

White LED; Phosphor; Sol-gel; Luminescence; Judd-Ofelt theory; SOL-GEL SYNTHESIS; PHOTOLUMINESCENCE PROPERTIES; LUMINESCENT PROPERTIES; OPTICAL SPECTROSCOPY; ENERGY-TRANSFER; NA; LI;

D O I：

10.1016/j.jlumin.2015.10.006

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Eu3+:KLa(WO4)(2) (Eu:KLW) phosphors were prepared through Pechini type sol-gel method. Low temperature synthesis was achieved through polyesterification between citric acid and ethylene glycol during the growth procedure. The properties of phosphors were analysed using X-ray diffractogram (XRD), scanning electron microscopy (SEM), Raman and luminescence spectroscopy. An effective energy transfer from the tungstate matrix to the activator Eu3+ was observed. Intense red emission in Eu:KLW phosphors was observed while excited with f-f transitions of Eu3+. The Judd-Ofelt (J-O) intensity parameters Omega(2) and Omega(4) were obtained from the emission intensities of D-5(0)-> F-7(2,4), respectively by taking the magnetic dipole D-5(0)-> F-7(1) emission band intensity as reference. The CIE colour co-ordinates of the Eu: KLW red phosphors was calculated (x=0.650, y=0.348), which are close to NTSC standard values. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：547 / 555

页数：9

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