加入收藏  设为首页
 
Home | 中文  
   Home   |   About Journal   |   Editorial Board   |   Instruction   |   Rewarded   |   Indexed-in   |   Impect Factor   |   Subscriptions   |   Contacts Us
SPECTROSCOPY AND SPECTRAL ANALYSIS  2017, Vol. 37 Issue (08): 2627-2631    DOI: 10.3964/j.issn.1000-0593(2017)08-2627-05
|
Preparation and Luminescence Properties of a New Green Emitting Ca3Mg3Si4O14∶Eu2+ Phosphor
PAN Hua-yan, WANG Le*, LI Yang-hui, WU Tuo, LUO Dong
College of Optical and Electronic Science and Technology, China Jiliang University, Hangzhou 310018, China
Download: PDF (1960 KB)  
Export: BibTeX | EndNote (RIS)      
Abstract  Green light-emitting Ca3Mg3Si4O14∶Eu2+ phosphors were prepared by solid-state reaction using CaCO3, MgO, SiO2 and Eu2O3 as raw materials. The effects of Eu-doping concentration and fluxes (NH4Cl, BaF2) on the crystal structure, luminescence property, and thermal stability of phosphor were studied, which were characterizes by X-ray diffraction (XRD), and photoluminescence (PL) spectra, respectively. The XRD results show that the crystal structure of Ca3Mg3Si4O14∶Eu2+ is consistent with the calculated patterns, which investigated the crystal structure of the compound Ca3Mg3Si4O14∶Eu2+. The phosphor has strong excitation around 360~450 nm and exhibits a broad emission band with a maximum at 530 nm under 440 nm excitation. With the increase of Eu2+ concentration, the phosphor shows a red-shift and the quenching concentration of Eu2+ is about 6%. With the introduction of NH4Cl and BaF2 as fluxes, the luminous intensity of Ca3Mg3Si4O14∶Eu2+ phosphor has been improved. Compared with the luminescence intensity of Ca3Mg3Si4O14∶Eu2+phosphor without flux, the photoluminescence intensity increased by 70% when adding NH4Cl as flux. Furthermore, the emission intensity reduced by only 7.6% and 14% at 150 ℃ for Ca3Mg3Si4O14∶Eu2+ phosphor and commercial green phosphor. The Ca3Mg3Si4O14∶Eu2+ phosphor also possesses high thermal stability, and these luminescnce properties indicate that Ca3Mg3Si4O14∶Eu2+ phosphor is a promising green phosphor for use in solid-state white lighting.
Key words:Phosphor; Luminescence properties; Flux; Thermal stability
Received: 2016-07-05     Accepted: 2017-01-16    
ZTFLH:  O462.3  
Corresponding Authors: WANG Le     E-mail: calla@cjlu.edu.cn
Cite this article:   
URL:  
https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2017)08-2627-05     OR      https://www.gpxygpfx.com/EN/Y2017/V37/I08/2627