| 白光LED用红色荧光粉CaWO_4:Eu~(3+),Li~+,Bi~(3+)的制备与表征 |
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| 引用本文： | 杨继兰,王卓. 白光LED用红色荧光粉CaWO_4:Eu~(3+),Li~+,Bi~(3+)的制备与表征[J]. 中国稀土学报, 2010, 28(5) |
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| 作者姓名： | 杨继兰 王卓 |
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| 作者单位： | 烟台大学环境与材料工程学院; |
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| 基金项目： | 山东省烟台大学学生科技创新项目 |
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| 摘 要： | 采用预先球磨、再二次热处理的高温固相合成法,制备了一系列白光LED用红色荧光粉CaWO4:Eu3+,L i+,B i3+,利用XRD,SEM和荧光光谱测试对其进行表征。XRD分析表明,所合成的样品为单一的四方晶系CaWO4,Eu3+,L i+,B i3+离子的先后掺杂使基质的部分衍射峰峰位向小角度移动;SEM照片显示,经过预先球磨制备的样品颗粒比较均一,尺寸约为0.5~3μm范围,结晶性好;荧光光谱测试发现这一系列荧光粉不仅可以被紫外光(254 nm)激发,还能被近紫外光(393 nm)和蓝光(465 nm)有效激发,其主发射峰值位于616 nm(Eu3+离子的5D0→7F2跃迁)的红光;另外详细研究了预先球磨的效果、加入H3BO3做助熔剂的质量分数以及Eu3+,L i+,B i3+离子单掺或多掺时的浓度对该体系荧光粉发光特性的影响。
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| 关 键 词： | 球磨 红光荧光粉CaWO4:Eu3+,Li+,Bi3+ 白光LED 钨酸盐 |
Preparation and Characterization of CaWO4:Eu3+,Li+,Bi3+ Red Phosphor for White LEDs |
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| Yang Jilan,Wang Zhuo. Preparation and Characterization of CaWO4:Eu3+,Li+,Bi3+ Red Phosphor for White LEDs[J]. Journal of the Chinese Society of Rare Earths, 2010, 28(5) |
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| Authors: | Yang Jilan Wang Zhuo |
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| Affiliation: | Yang Jilan,Wang Zhuo*(School of Environmental and Materials Engineering,Yantai University,Yantai 264005,China) |
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| Abstract: | Novel red light-emitting phosphors of(Ca,Eu,Li,Bi)WO4 for white LEDs were synthesized by pre-milling and reheat treatment of high temperature solid-state reaction route.The samples were characterized by means of X-ray diffraction,scanning electron microscopy and photoluminescence spectra.The XRD patterns showed that the synthesized crystalline powders were sole tetragonal system CaWO4,and the host of part diffraction peaks moved to a smaller angle with the doping of Eu3+,Li+,Bi3+ ions.The SEM photographs sh... |
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| Keywords: | ball-milling red light phosphor of CaWO4: Eu3 Li Bi3 white LEDs tungstate |
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