| LiCaPO4:Eu3+材料制备白光LED及其发光特性 |
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| 引用本文： | 王志军,李盼来,杨志平,郭庆林.LiCaPO4:Eu3+材料制备白光LED及其发光特性[J].光电子．激光,2011(5):718-721. |
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| 作者姓名： | 王志军 李盼来 杨志平 郭庆林 |
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| 作者单位： | 河北大学物理科学与技术学院；;河北大学物理科学与技术学院；;河北大学物理科学与技术学院；;河北大学物理科学与技术学院； |
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| 基金项目： | 国家自然科学基金资助项目(50902042);河北省自然科学基金资助项目(E2009000209;E2010000283);河北省教育厅基金资助项目(2009313);发光与光信息技术教育部重点实验室研究基金资助项目(2010LOI12) |
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| 摘 要： | 采用高温固相法制备了LiCaPO4:Eu3+红色发光材料,研究了Eu3+掺杂浓度、R+或Cl-等对材料发光性质的影响.结果显示,在399 nm近紫外光激发下,材料呈多峰发射,分别由Eu3+的5DO→7FJ(J=0,1,2,3,4)能级跃迁产生,主峰为612 nm;监测612 nm发射峰,所得激发光谱由O2-→Eu3+电...
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| 关 键 词： | 白光LED 发光 LiCaPO4 Eu3+ |
Preparation and luminescent characteristics of white LED with LiCaPO4:Eu3+ phosphor |
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| WANG Zhi-jun,LI Pan-lai,YANG Zhi-ping and GUO Qing-lin.Preparation and luminescent characteristics of white LED with LiCaPO4:Eu3+ phosphor[J].Journal of Optoelectronics·laser,2011(5):718-721. |
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| Authors: | WANG Zhi-jun LI Pan-lai YANG Zhi-ping and GUO Qing-lin |
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| Affiliation: | College of Physics Science & Technology,Hebei University,Baoding 071002,China;College of Physics Science & Technology,Hebei University,Baoding 071002,China;College of Physics Science & Technology,Hebei University,Baoding 071002,China;College of Physics Science & Technology,Hebei University,Baoding 071002,China |
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| Abstract: | A novel red emitting phosphor LiCaPO4:Eu3+ was synthesized by the high temperature solid state reaction method,and the effects of Eu3+ content,R+ and Cl-on the luminescent properties of the phosphor were investigated.LiCaPO4:Eu3+ phosphor presents several emission peaks under 399 nm excitation,which correspond to the 5D0→7FJ(J=0,1,2,3,4) transition of Eu3+,respectively,and the highest emission is located at 612 nm.At 612 nm emission,the excitation spectrum contains 200-350 nm and 350-450 nm two excitation bands,which correspond to a weak charge transition broad band absorption CTS and a strong f-f transition absorption of Eu3+,respectively,and the highest peak is located at 399 nm.The emission intensity of the phosphor is influenced by Eu3+ content,and reaches the maximum at 5% Eu3+.The concentration quenching mechanism is the d-d interaction by Dexter theory.Under the conditions of R+ or Cl-incorporated in the phosphor,the emission intensity can be enhanced,and it is found that Li+ and Cl-can exhibit the strongest charge compensation ability. |
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| Keywords: | white LED luminescence LiCaPO4:Eu3+ |
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