Synthesis and Photoluminescence of β-SiAlON: Eu2+ Blue Phosphor

被引:0
作者
Li You-Fen [1 ]
Li Jie [1 ]
Yang Jian-Long [1 ]
机构
[1] Beijing Univ Chem Technol, Key Lab Beijing City Preparat & Proc Novel Polyme, Beijing 100029, Peoples R China
来源
CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE | 2010年 / 31卷 / 12期
关键词
beta-SiAlON; Thermal reduction method; Energy transfer; Photoluminescence; LUMINESCENCE PROPERTIES; ALPHA-SIALON; EMISSION; CE3+;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
beta-SiAlON: xEu(2+) (x = 0.02, 0.05, 0.08, 0.10) blue phosphor was synthesized from Si, SiO2, AlN and Eu2O3 powders by metallothermic reduction-nitridation reaction. The influences of firing temperatures on compositions of beta-SiAlON: Eu and photoluminescence were investigated by X-ray diffractometer and fluorescent spectrophotometer, respectively. The results indicate that excitation spectra of beta-SiAlON: Eu2+ consist of two broad bands centered at 290 and 325 nm, and emission spectrum exhibits a single intense broad emission band at similar to 485 nm with half-peak width of 75 nm, which corresponds to 5d-4f transition of Eu2+. The critical concentration (molar fraction) of Eu2+ is 8%. The mechanism analysis suggests that the energy transfer between the Eu2+ -Eu2+ ions occurs and the critical distance is 1.44 nm. Eu2+ occupies the space of tubular channel along [001] direction in the beta-SiAlON crystal.
引用
收藏
页码:2334 / 2338
页数:5
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