Open AccessPreparation and luminescent properties of Sr0.8-xBaxEu0.2WO4 red phosphors for white LED
Author(s) -
Mao Jin-Wei,
Luuml; Shu-Chen,
Xiurong Qu,
He Dong-Li,
Qingwei Meng
Publication year - 2013
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.62.037803
Subject(s) - phosphor , materials science , luminescence , tetragonal crystal system , doping , crystal structure , excited state , emission intensity , analytical chemistry (journal) , crystal (programming language) , optoelectronics , crystallography , chemistry , atomic physics , physics , chromatography , computer science , programming language
Sr0.8-xBaxEu0.2WO4 red phosphors with different Ba2+ doping concentrations is prepared by the co-precipitation method at different sintering temperatures. We study the influences of the crystal orientation and lattice distortion of the samples on the luminescence property. The results show that the Sr0.8-xBaxEu0.2WO4 synthesized by the process has a phase with tetragonal structure and that the red emission 5D0-7F2 of Eu3+ in the sample can be excited effectively by the near-UV light and blue light. The part of Sr2+ replaced with Ba2+ leads to the increase in emission intensity of Sr0.8-xBaxEu0.2WO4. The doping concentration of Ba2+ has a great influence on the crystal parameter, the crystal symmetry and the luminescent property. The optimized doping concentration of Ba2+ is found to be 30%.