摘要
采用高温固相法在还原气氛下合成了CaCO3-B2O3-CaCl2(CBC)基质双掺铕(Eu)和铋(Bi)红色长余辉发光材料.利用扫描电子显微镜、X射线衍射、荧光光谱及余辉衰减曲线对材料的形貌、结构、光谱特性及余辉特性进行了研究.研究发现:该长余辉材料经过紫外灯照射后,能观察到较长时间的红色长余辉发光.通过荧光光谱分析,在284nm和463nm波长激发下,产生了峰值波长631nm的Eu2+离子宽带(4f65d1→4f7)跃迁峰;在254nm和394nm激发下,除了有上述跃迁之外,还出现了Eu3+离子的5 D0-7FJ(J=1,2,3,4)跃迁.
Novel red long persistent phosphors of CaCO3-B2O3-CaCl2（CBC）： Eu, Bi have been synthesized at high temperature of slide-state and weak reductive atmosphere. The prepared CBC ： Eu, Bi phosphor was characterized with scanning electron microscopy, X-ray diffraction, photoluminescence and afterglow decay curve. The long persistent phosphor emits intense red long-lasting phosphorescence for a longer time after irradiation by UV light. By the luminescence spectra analysis, the long persistent phosphor emission spectrum shows a red broader emission peak at 631 nm that attributed to Eu2＋ ions transition from 4f^65d^1→4f^7 when excited by 284 nm and 463 nm; there are some red sharp emission peaks which belong to Eu3＋ ions transition from ^5D0-7Fj（J=1,2,3,4） besides above-mentioned transition.
出处
《浙江工业大学学报》
CAS
2013年第6期695-698,共4页
Journal of Zhejiang University of Technology
基金
浙江省自然科学基金资助项目(Y4090599)
浙江省钱江人才计划项目(2011R10034)
关键词
高温固相
铕
长余辉
high temperature solid-state
europium
long-lasting phosphor
