| Eu2+在KNaCa2（PO4）2中的发光及晶体学格位 |
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| 引用本文： | 王志军,李妍,王颖,李盼来,郭庆林,杨志平.Eu2+在KNaCa2（PO4）2中的发光及晶体学格位[J].无机材料学报,2011(7):731-734. |
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| 作者姓名： | 王志军 李妍 王颖 李盼来 郭庆林 杨志平 |
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| 作者单位： | 河北大学物理科学与技术学院;河北大学化学与环境科学学院; |
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| 基金项目： | 国家自然科学基金(50902042); 河北省自然科学基金(E2009000209,E2010000283); 河北省教育厅基金(2009313); 发光与光信息技术教育部重点实验室研究基金(2010LOI12)~~ |
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| 摘 要： | 采用高温固相法制备了KNaCa2(PO4)2:Eu2+蓝色荧光粉,并研究了材料的发光特性.在400 nm近紫外光激发下,材料呈非对称的单峰发射,主峰位于470 nm.监测470 nm发射峰,对应的激发光谱覆盖200~450 nm,主峰位于400 nm,说明材料能够很好的吸收紫外?近紫外光,发射蓝色光.利用van Uitert公式计算了Eu2+取代KNaCa2(PO4)2中Ca2+时所占晶体学格位,得出461和502 nm发射分别归属于八配位和六配位的Eu2+发射.研究了Eu2+掺杂浓度对KNaCa2(PO4)2:Eu2+材料发射强度的影响,结果显示Eu2+的最佳掺杂浓度为1mol%,利用Dexter理论得出其浓度猝灭机理为电偶极?电偶极相互作用.
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| 关 键 词： | 白光LED KNaCa2(PO4)2:Eu2+ 发光 晶体学格位 |
Luminescence and Crystallographic Sites of Eu~(2+) in KNaCa_2(PO_4)_2 |
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| WANG Zhi-Jun,LI Yan,WANG Ying,LI Pan-Lai,GUO Qing-Lin,YANG Zhi-Ping.Luminescence and Crystallographic Sites of Eu~(2+) in KNaCa_2(PO_4)_2[J].Journal of Inorganic Materials,2011(7):731-734. |
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| Authors: | WANG Zhi-Jun LI Yan WANG Ying LI Pan-Lai GUO Qing-Lin YANG Zhi-Ping |
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| Affiliation: | WANG Zhi-Jun1,LI Yan2,WANG Ying1,LI Pan-Lai1,GUO Qing-Lin1,YANG Zhi-Ping1(1.College of Physics Science & Technology,Hebei University,Baoding 071002,China,2.College of Chemistry & Environ-mental Science,China) |
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| Abstract: | A blue phosphor,KNaCa2(PO4)2:Eu2+,was prepared by the high temperature solid-state method,and its luminescent characteristics were investigated.The spectral characteristics show that it can be effectively excited by near ultraviolet light(400 nm),and exhibits blue light(470 nm).The crystallographic sites of Eu2+ in KNaCa2(PO4)2 are calculated by van Uitert formula.In KNaCa2(PO4)2:Eu2+,the emission band centered at 461 nm originates from the Eu2+ center of the eight compounds,and the emission band centered a... |
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| Keywords: | white LED KNaCa2(PO4)2:Eu2 luminescence crystallographic sites |
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