Effects of Li+ Codoping on the Optical Properties of SrAl2O4 Long Afterglow Ceramic Phosphors. (4th August 2014)

• Record Type: Journal Article
• Authors: Atabaev, Timur Sh.; Thi Vu, Hong Ha; Kim, Mac; Yang, Yong Suk; Kim, Hyung-Kook; Hwang, Yoon-Hwae
• Other Names: Consales Marco Academic Editor.
• Is Part Of: Advances in optics. Volume 2014(2014)
• Publication Date: 2014-08-04
• Subjects: Optics -- Periodicals; Optics; Periodicals; Electronic journals; 535
• DOI: 10.1155/2014/459065
• Languages: English
• ISSNs: 2356-6817

Abstract

Abstract : Rare-earths codoped long afterglow strontium aluminate phosphors with high brightness were synthesized via a facile combustion synthesis method using urea as a fuel. The resulted phosphor particles were analyzed by using X-ray diffraction and field emission scanning electron microscope, whereas their optical properties were monitored by photoluminescence spectroscopy. The prepared SrAl2 O4 :Eu 2+, Dy 3+, Li + samples showed a broad green-yellowish emission, peaking at 512 nm when excited by 348 nm. Compared to traditional SrAl2 O4 :Eu 2+, Dy 3+ phosphor, the initial luminescence brightness of SrAl2 O4 :Eu 2+, Dy 3+, codoped with Li + improved from 1.89 cd/m 2 to 2.71 cd/m 2 and the afterglow decay time was prolonged from 103 to 121 min. The possible mechanism of SrAl2 O4 :Eu 2+, Dy 3+, Li + phosphorescence enhancement has been discussed.