Structure and Photoluminescence of Eu2+ Doped Sr2Al2SiO7 Cyan-Green Emitting Phosphors. (3rd December 2014)

• Record Type: Journal Article
• Authors: Lu, Fa-Chun; Bai, Li-Jing; Dang, Wei; Yang, Zhi-Ping; Lin, Peng
• Is Part Of: ECS journal of solid state science and technology. Volume 4:Number 2(2015)
• Page Start: R27
• Page End: R30
• Publication Date: 2014-12-03
• Subjects: Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0151502jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : Eu 2+ doped Sr2 Al2 SiO7 cyan-green emitting phosphors have been synthesized with solid-state reaction method. With Rietveld refinement technique, Sr2 Al2 SiO7 equivalent sites and atomic positions were acquired. The Sr2 Al2 SiO7 :Eu 2+ photoluminescence at room and high temperature were investigated. This phosphor shows the Eu 2+ broad band excitation and emission spectra corresponding to Eu 2+ transitions between the 4 f 7 ground state and the lower 4 f 6 5 d 1 crystal splitting states. The luminescent properties as a function of Eu 2+ concentration were investigated. The mechanism of dipole-dipole interaction dominates the non-radiative energy transfer between the Eu 2+ luminescent centers and causes the concentration quenching of this phosphor. The radiation re-absorption is proposed to be the mechanism for the emission red shift. The emission band shows slight blue shift with increased temperature. Sr2 Al2 SiO7 :Eu 2+ is a kind of promising blue to cyan emitting phosphor.