| 白光LED用Ca7（SiO4）2Cl6∶Eu2+荧光粉的光谱性能研究 |
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| 作者姓名： | Liu C Guan L Zhang H Li PL Guo QL Yang ZP Fu GS |
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| 作者单位： | 河北大学物理科学与技术学院;河北省光电信息材料重点实验室 |
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| 基金项目： | 国家自然科学基金项目(50902042);中国博士后科学基金项目(20100480839);河北大学光学工程博士后基金;河北省自然科学基金项目(A2010000184);河北省高等学校科学技术研究指导项目(Z2010118)资助 |
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| 摘 要： | 通过高温固相法制备了用于紫外激发白光LED的蓝绿色Ca7(SiO4)2Cl6∶Eu2+荧光粉,并对样品进行了XRD分析和发光性能测试。结果表明,合成的样品为单相Ca7(SiO4)2Cl6;在紫外光激发下,样品的发射谱包括418和502nm两个发射峰。分别监测这两个发射峰,得到了峰值位于290和360nm处的两个宽带激发谱,说明Eu2+离子在基质晶格中可能占有两个不同的格位。研究了Eu2+离子浓度对发光强度的影响,最佳掺杂浓度为0.75mol%。结果表明该荧光粉是一种较好的蓝绿色发光材料。
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| 关 键 词： | 高温固相法 Ca(SiO4)2Cl6∶Eu2+ 光谱性能 掺杂浓度 |
Study on the spectral properties of Ca7(SiO4)2Cl6 phosphor for white LED |
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| Liu C,Guan L,Zhang H,Li PL,Guo QL,Yang ZP,Fu GS.Study on the spectral properties of Ca7(SiO4)2Cl6 phosphor for white LED[J].Spectroscopy and Spectral Analysis,2012,32(4):1016-1019. |
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| Authors: | Liu Chong Guan Li Zhang Hao Li Pan-lai Guo Qing-lin Yang Zhi-ping Fu Guang-sheng |
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| Institution: | College of Physics Science and Technology, Hebei University, Baoding 071002, China. lixcn@sina.com |
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| Abstract: | A bluish green Ca7 (SiO4)2Cl6 : Eu2+ phosphor used for UV excited white LED was synthesized by high temperature solid state method. The XRD patterns and luminescence properties were investigated. The results indicated that the sample was single Ca7 (SiO4)2Cl6 phase; the emission spectrum included two emission peaks located at 418 and 502 nm, respectively. Monitoring for the two emission peaks, the excitation spectra were two broad band peaks centered at 290 and 360 nm respectively, which illustrated that Eu2+ ions located at two different crystal lattice sites. The influence of Eu2+ ions concentration on the luminescence intensity was studied and the optimal doping concentration was 0.75 mol%. The results showed that this phosphor was a better candidate bluish phosphor for UV based white LED. |
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| Keywords: | High temperature solid state method Ca7(SiO4)2Cl6∶Eu2+ Spectral properties Doping concentration |
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