| 白光LED用钨酸盐红色荧光粉的制备及发光特性 |
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| 引用本文： | 项文斗,刘晓华,张伟,胡正发. 白光LED用钨酸盐红色荧光粉的制备及发光特性[J]. 化工新型材料, 2011, 0(Z2) |
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| 作者姓名： | 项文斗 刘晓华 张伟 胡正发 |
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| 作者单位： | 广东工业大学物理与光电工程学院; |
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| 基金项目： | 广东省自然科学基金(7008121); 人事部留学人员科技活动项目择优资助经费; 教育部回国留学人员基金资助项目; 广东工业大学科研启动项目 |
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| 摘 要： | 采用高温固相法制备了NaY(WO4)2:Eu3+发光材料。分别用X射线粉末衍射(XRD)、发光光谱(PL)等手段研究了发光粉的晶体结构以及发光性能。XRD结果表明,Eu3+掺杂浓度达到25%(摩尔分数)时,仍然能够形成纯相的NaY(WO4)2:Eu3+多晶粉末。NaY(WO4)2:Eu3+的激发光谱由强度很大的宽激发带(220～300nm)和锐线谱(峰值位于393nm和465nm)组成,其中宽激发带源于O2-→W6+和O2-→Eu3+电荷转移,锐线谱属于Eu3+的4f-4f跃迁吸收,发射光谱显示随Eu3+浓度的增大,NaY(WO42):Eu3+光发射强度逐渐增大,当Eu3+浓度为20%时,发射强度达到最大,随后出现浓度猝灭。
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| 关 键 词： | 白光LED NaY(WO42):Eu3 制备 发光 |
Preparation and luminescent properties of Eu~(3+) activated tungstate red-emmiting phosphors for white-LEDs |
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| Xiang Wendou Liu Xiaohua Zhang Wei Hu Zhengfa. Preparation and luminescent properties of Eu~(3+) activated tungstate red-emmiting phosphors for white-LEDs[J]. New Chemical Materials, 2011, 0(Z2) |
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| Authors: | Xiang Wendou Liu Xiaohua Zhang Wei Hu Zhengfa |
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| Affiliation: | Xiang Wendou Liu Xiaohua Zhang Wei Hu Zhengfa (School of Physics and Photoelectrinic Engineering,Guangdong University of Technology,Guangzhou 510006) |
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| Abstract: | The NaY(WO4)2:Eu3+ phosphors were synthesized by the high temperature solid-state reaction method.The powder samples were characterized by X-ray diffraction(XRD) and photoluminescence(PL).The XRD results showed the formation of pure NaY(WO4)2:Eu3+ up to 25 mole% of Eu3+ concentration.The room temperature excitation spectra vared with the Eu3+ concentration and consist of an intense broad band from 220 to 300nm and weak narrow f-f transitions peaking at about 393nm and 465nm.The broad band was attributed to ... |
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| Keywords: | white-LEDs NaY(WO4)2:Eu3 synthesis luminescence |
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