Open AccessThe effect of Eu2+ doping concentration on luminescence properties of Ca2-xMgSi2O7∶x Eu2+ green phosphor
Author(s) -
Shixiu Cao,
Tao Han,
TU Ming-jing
Publication year - 2011
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.60.127802
Subject(s) - phosphor , luminescence , doping , materials science , coprecipitation , analytical chemistry (journal) , excited state , quenching (fluorescence) , emission intensity , emission spectrum , fluorescence , optics , optoelectronics , spectral line , chemistry , atomic physics , inorganic chemistry , physics , chromatography , astronomy
The Ca2-xMgSi2O7∶xEu2+ green phosphor is synthesized by chemical coprecipitation. X-ray diffraction and the fluorescence spectrophotometry are used to investigate the structural and the luminescent properties of the Ca2-xMgSi2O7∶xEu2+ green phosphor. The result shows that the excitation spectrum of the Ca2-xMgSi2O7∶xEu2+green phosphor extends from 300 nm to 480 nm, and the peaks appear around 389 and 430 nm, thus the phosphor can be excited effectively by InGaN chip in a range of 360480 nm. The peak of the emission spectrum appears around 531 nm. The emission spectrum intensity first increases and then decreases with Eu2+ doping concentration increasing. The strongest emission intensity is obtained when Eu2+doping concentration reaches 0.04. The concentration self-quenching is attributed to the d-d interaction according to the Dexter theory.