| Eu3+在La2O2S中的长余辉发光 |
| The Long Afterglow of Eu3+-activated La2O2S |
| 作者 | 单位 | | 宋春燕 | 暨南大学化学系,广州,510632 | | 雷炳富 | 暨南大学化学系,广州,510632 | | 刘应亮 | 暨南大学化学系,广州,510632 | | 石春山 | 中国科学院长春应用化学研究所稀土化学与物理国家重点实验室,长春,130022 | | 张静娴 | 暨南大学化学系,广州,510632 | | 黄浪欢 | 暨南大学化学系,广州,510632 | | 袁定胜 | 暨南大学化学系,广州,510632 |
|
| 摘要: |
| 关键词: 长余辉 硫氧化镧 铕离子 |
| 基金项目: |
| Abstract: The new Eu3+ doped lanthanum oxysulfide phosphors,which have the orange-red long afterg low emission,were synthesized by solid-state reaction method.The synthesized phosphors were characterized by X-ray diffraction.The excitation and emission spectra,afterglow spectra and afterglow decay curves were examined.XRD confirmed the phosphor as pure phase La2O2S.The phosphors showed typical transitions 5DJ(J=0,1) → 7JJ(J=0,1,2,3,4)of Eu3+.The photoluminescence spectra and afterglow spectra presented the regular alteration with various Eu3+ concentration, due to cross relaxation between energy levels of Eu3+. In addition, we studied the effects of activator concentration and dopants species on the afterglow property. The data showed afterglow result was the best with 2 % Eu3+ and doped with Mg2+ and Zr4+. A prominent phosphorescence can be seen in this phosphor after illuminated with UV light. |
| Keywords: long afterglow lanthanum oxysulfide europium ion |
| |
| 摘要点击次数: 1280 |
| 全文下载次数: 1769 |
| 宋春燕,雷炳富,刘应亮,石春山,张静娴,黄浪欢,袁定胜.Eu3+在La2O2S中的长余辉发光[J].无机化学学报,2004,20(1):89-93. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
