搜索

x

留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

Ce3+在LiBaBO3中的发光特性及晶体学格位

李盼来 王志军 王颖 杨志平 郭庆林 李旭 杨艳民 傅广生

引用本文:
Citation:

Ce3+在LiBaBO3中的发光特性及晶体学格位

李盼来, 王志军, 王颖, 杨志平, 郭庆林, 李旭, 杨艳民, 傅广生

Luminescence characteristics and crystallographic sites of Ce3+ in LiBaBO3

Li Pan-Lai, Wang Zhi-Jun, Wang Ying, Yang Zhi-Ping, Guo Qing-Lin, Li Xu, Yang Yan-Min, Fu Guang-Sheng
PDF
导出引用
  • 采用固相法制备了LiBaBO3:Ce3+发光材料.测得LiBaBO3:Ce3+材料的发射光谱为一不对称的单峰宽谱,主峰位于440 nm;监测440 nm发射峰,可得其激发光谱为一主峰位于370 nm的宽谱.利用van Uitert公式计算了Ce3+取代LiBaBO3中Ba2+时所占晶体学格位,得出438 nm发射带归属于九配位的Ce3+发射,而469 nm发射带起源于八配位的Ce3+发射.研究了Ce3+浓度对LiBaBO3:Ce3+材料发光强度的影响,结果显示,随Ce3+浓度的增大,发光强度呈现先增大后减小的趋势,Ce3+浓度为3mol%时强度最大,造成其浓度猝灭的原因为电偶极-偶极相互作用.引入Li+,Na+或K+可增强LiBaBO3:Ce3+材料的发射强度.利用InGaN管芯(370 nm)激发LiBaBO3:Ce3+材料,获得了很好的蓝白光发射,色坐标为(x=0.291,y=0.297).
    LiBaBO3:Ce3+ phosphor was prepared by solid-state method,and its luminescence characteristics were investigated. LiBaBO3:Ce3+ phosphor shows one asymmetrical band at 440 nm. Monitored at 440 nm,the excitation spectrum has a broad band at 370 nm. The crystallographic sites of Ce3+ in LiBaBO3 were calculated by van Uitert formula,the results show that the emission band centered at 438 nm originates from the Ce3+ center of the nine compounds,and at 469 nm originates from the Ce3+ center of the eight compounds. The effect of Ce3+ concentration on luminescent intensity of LiBaBO3:Ce3+ phosphor was investigated,the result shows that the luminescent intensity firstly increases with increasing Ce3+ concentration,and reaches the maximal value at 3mol% Ce3+, then decreases. The concentration quenching mechanism is the dipole-dipole interaction by Dexter theory. Under the condition of doping charge compensator Li+,Na+ or K+,the emission intensity of LiBaBO3:Ce3+ was all heightened. The relative emission spectrum of the InGaN-based LiBaBO3:Ce3+ light emitting diode(LED) was investigated,and the CIE chromaticity of InGaN-based LiBaBO3:Ce3+ LED is (x=0.291,y=0.297),and shows the blue white emission.
    • 基金项目: 河北省自然科学基金(批准号:E2009000209)资助的课题.
计量
  • 文章访问数:  7862
  • PDF下载量:  1086
  • 被引次数: 0
出版历程
  • 收稿日期:  2008-11-18
  • 修回日期:  2009-01-05
  • 刊出日期:  2009-04-05

/

返回文章
返回