| 掺杂稀土CaAl 2O4基发光材料的制备及其发光机制 |
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| 引用本文： | 林元华,张中太,唐子龙,张枫,陈清明.掺杂稀土CaAl 2O4基发光材料的制备及其发光机制[J].材料工程,2001(8):29-31,35. |
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| 作者姓名： | 林元华 张中太 唐子龙 张枫 陈清明 |
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| 作者单位： | 清华大学材料科学与工程系 |
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| 基金项目： | 国家自然科学基金，59872016， |
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| 摘 要： | 用固相烧结法制备了亮度高、余辉时间长的CaAl2O4:Eu,RE(RE为Nd,Dy)发光粉体材料，并对其发光性能进行了研究。发光粉体的发射光谱表明，其主发射峰均位于440nm左右。余辉衰减曲线证明其余辉衰减过程存在快速衰减和慢衰减两个过程。对于长余辉发光机制，认为Nd,Dy的加入起到了陷阱能级作用，从而延长了发光时间，增强发光亮度。并且在此基质材料中，Nd的陷阱深度比Dy的更合适，因而CaAl2O4:Eu,Nd的发光性能要优于CaAl2O4:Eu,Dy。
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| 关 键 词： | 稀土 钕 镝 长余辉发光材料 固相烧结 CaAl2O4 铝酸钙 制备 发光性能 掺杂 |
| 文章编号： | 1001-4381(2001)08-0029-03 |
Preparation of CaAl2O4-based Long Afterglow Luminescent Material and its Luminescent Mechanism |
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| LIN Yuan hua,ZHANG Zhong tai,TANG Zi long,ZHANG Feng,CHEN Qing ming.Preparation of CaAl2O4-based Long Afterglow Luminescent Material and its Luminescent Mechanism[J].Journal of Materials Engineering,2001(8):29-31,35. |
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| Authors: | LIN Yuan hua ZHANG Zhong tai TANG Zi long ZHANG Feng CHEN Qing ming |
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| Abstract: | The long afterglow and high brightness of CaAl 2O 4:Eu,RE(RE:Nd,Dy) luminescent materials were prepared by the solid sintering method The luminescent properties were studied, the emission spectra showed that both of the main peaks lie in about 440nm, and the decay curve indicated that the decay process contains the rapid decaying and slow decaying processes The long afterglow mechanism is considered to be that the doped Dy 3+ and Nd 3+ worked as hole traps, they prolonged the luminescent time and enlarged the brightness The trap depth of CaAl 2O 4:Eu,Nd is more suitable than that of CaAl 2O 4:Eu,Dy, and therefore, the luminescent properties of CaAl 2O 4:Eu,Nd are superior to that of CaAl 2O 4:Eu,Dy |
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| Keywords: | rare earth Nd Dy long afterglow luminescent materials |
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