| Al3+掺杂BaFBr:Eu2+中F(Br-)心的性质 |
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| 引用本文： | 余华,熊光楠,陈士明,严晓敏,郑震,张丽平.Al3+掺杂BaFBr:Eu2+中F(Br-)心的性质[J].发光学报,2002,23(6):599-603. |
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| 作者姓名： | 余华 熊光楠 陈士明 严晓敏 郑震 张丽平 |
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| 作者单位： | 1. 天津理工学院,材料物理研究所,天津,300191
2. 复旦大学,分析测试中心,上海,200433 |
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| 基金项目： | 天津市科委科研项目，天津市高教局重点项目，013180611，，， |
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| 摘 要： | 作为光激励发光的首选材料BaFBr:Eu^2 ，在其中掺杂一定量的Al^3 后，其光激励发光谱向长波方向发生了较大的红移现象，红移的机理是掺杂的Al^3 离子取代了BaFBr:Eu^2）晶格中的Ba^2 离子，且处于F（Br^-）心的次近邻位所致。本文利用喇曼光谱和电子顺磁共振谱对受掺杂Al^3 微扰的F（Br^-)心的结构进行了研究，首次在喇曼光谱的高频移区观测到了由于掺参Al^3 所引起的新结构的产生，通过电子顺磁共振谱表征了在BaFBr:Eu^2＋中Al^3 与F（Br^-）心的相对位置，并且得出F（Br^-)心与OF^-心存在着空间相关性。
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| 关 键 词： | Al^3＋掺杂 BaFBr：Eu^2＋ F（Br^－）心 性质 光激励发光 喇曼光谱 电子顺磁共振 铝离子掺杂 结构分析 铕（Ⅱ） 红移现象 |
Properties of F(Br-) Centers in BaFBr:Eu2 + Doped with Al3+ |
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| Abstract.Properties of F(Br-) Centers in BaFBr:Eu2 + Doped with Al3+[J].Chinese Journal of Luminescence,2002,23(6):599-603. |
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| Authors: | Abstract |
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| Abstract: | BaFBr:Eu2+ is a good photostimulated luminescent(PSL) material. The experimentsshow that compared with BaFBr:Eu2+, the phosphor BaFBr:Eu2+ doped with Al3+ has strongred-shift PSL peaks. The red-shift mechanism is considered as the replacement of Ba2 + by Al3 +doped in BaFBr:Eu2 + and the location of Al3+ is at next neighborhood to F(Br- ) centers. Thespectra of Raman scattering and electron paramagnetic resonance(EPR) were used to investigatethe structure of F(Br- ) centers effected by Al3+ . The new Raman peak structure is found at highfrequency region due to the fact that Al3 + doped in BaFBr: Eu2 + . The site relationship of Al3 +and F(Br- ) centers is observed and the spatial correlation between F (Br-) centers and OF- cen-ters was studied by EPR spectra. |
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| Keywords: | photostimulated luminescence BaFBr: Eu2 + Raman spectra EPR |
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