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采用共沉淀结合高温分解方法合成了CaO:Eu3+红色长余辉发光材料.X射线衍射分析表明,随着温度的升高, 产物相结构逐渐由碳酸钙的混合相变为单相结构,继而生成单相氧化钙结构.CaO:Eu3+的激发谱显示为255 nm左右的一个宽激发带和393 nm的激发峰,宽激发带来源于CaO晶格的电荷迁移(CTB),发射光谱对应于Eu3+的5D→7FJ(J=0, 2, 3, 4)的跃迁.室温观察到CaO:Eu3+强的红色长余辉发射,热释光测量证实在CaO:Eu3+ 中存在深度大约为0.69~eV的陷阱能级,这是CaO:Eu3+在室温具有红色长余辉的微观原因.存在的陷阱能级可能来源于Eu3+取代Ca2+进入晶格后,由于电荷的不等价替换而引入了电子陷阱.余辉衰减曲线的研究表明,样品的余辉发光可能与陷阱及发光中心之间的量子隧穿有关.The red long-persistent phosphor CaO: Eu3+ is prepared by a co-precipitation method with further thermal decomposition. The X-ray diffraction analysis shows that the crystal structure of calcium carbonate sample transforms into a single-phase structure and then generates a single-phase calcium oxide structure with the increase of sintering temperature. The excitation spectrum of CaO: Eu3+ shows a broad band around 255 nm, which is attributed to the charge transfer of Eu3+-O2-, and a sharp peak at 393 nm. The emission spectral limes of sample correspond to Eu3+ transitions between 5D and 7FJ (J=0, 2, 3, 4) electron configurations. The red long afterglow is observed at room temperature. A trap level located at 0.69 eV is found by thermolumihnescence measurement, which arises from the fact that Eu3+ is substituted for Ca2+ and enters into the lattice The afterglow luminescence mechanism of sample was discussed according to quantum tunneling.
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Keywords:
- long afterglow /
- CaO /
- quantum tunneling
[1] Setlur A A, Srivastava A M, Pham H L, Hannah M E, Happek U 2008 Journal of Applied Physics 103 053513
[2] Grace D M, Eric D R, Shen H E, Nathaniel T W, Volkmar D, Michael W 2009 Journal of Applied Physics 105 053101
[3] Wang Z J ,Li P L, Wang G, Yang Z P, Guo Q L 2008 Acta Phys. Sin. 57 4575(in Chinese) [王志军, 李盼来, 王刚, 杨志平, 郭庆林 2008 57 4575]
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[8] Niittykoski J, Aitasalo T, Hölsä J, Jungner H, Lastusaari M, Parkkinen M, Tukia M 2004 J. Alloys Compd. 374 108
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[13] Wang X D, Liu X H, Chen S J, Li M, Liu M 2007 Spect. and Spect. Analy. 27 2182 (in Chinese) [王孝东, 刘晓华, 陈绍军, 黎明, 刘敏 2007 光谱学与光谱分析 27 2182]
[14] Ningthoujam R S, Sudarsan V, Kulshreshtha S K 2007 Journal of Luminescence 127 747
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[20] Peng T Q, Wang Y H, Li Y, Xiong Y 2011 Spect. and Spect. Analy. 31 3223 (in Chinese) [彭铁球, 王银海, 李亚, 熊毅 2011 光谱学与光谱分析 31 3223]
[21] Liu C B, Che G B, Xu Z L, Wang Q W 2009 J. Alloys Compd. 474 250
[22] Che G B, Lin C B, Li X Y, Xu Z L, Liu Y, Wang H 2008 Journal of Physics and Chemistry of Solids 69 2091
[23] Pan Z W, Lu Y Y, Liu F 2011 Nature Materials 11 58
[24] Diallo P T, Jeanlouis K, Boutinaud P, Mahiou R, Cousseins J C 2001 J. Alloys Compd. 323-324 218
[25] Shalgaonkar C S, Narlikar A V 1972 Journal of Materials Scinence 7 1465
[26] Li C Y, Su Q, Qiu J R 2003 Journal of Luminescence 24 19 (in Chinese) [李宇, 苏锵, 邱建荣 2003 发光学报 24 19]
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[1] Setlur A A, Srivastava A M, Pham H L, Hannah M E, Happek U 2008 Journal of Applied Physics 103 053513
[2] Grace D M, Eric D R, Shen H E, Nathaniel T W, Volkmar D, Michael W 2009 Journal of Applied Physics 105 053101
[3] Wang Z J ,Li P L, Wang G, Yang Z P, Guo Q L 2008 Acta Phys. Sin. 57 4575(in Chinese) [王志军, 李盼来, 王刚, 杨志平, 郭庆林 2008 57 4575]
[4] Liao Q R, Zhuang W D, Xia T, Liu R H, Hu Y S, Teng X M, Liu Y H 2009 Acta Phys. Sin. 58 2776 (in Chinese) [廖秋荣, 庄卫东, 夏天 刘荣辉, 胡运生, 滕晓明, 刘元红 2009 58 2776]
[5] Yang Z P, Liu Y F 2006 Acta Phys. Sin. 55 4946 (in Chinese) [杨志平, 刘玉峰 2006 55 4946]
[6] Luo X X, Duan J X, Lin G X, Xu J, Yang Y, Xiao Z G 2003 Journal of Luminescence 24 165 (in Chinese) [罗希贤, 段锦霞, 林广旭, 徐晶, 杨宇, 肖志国 2003 发光学报 24 165]
[7] Aitasalo T, Hölsä J, Jungner H, Lastusaari M, Niittykoski J, Parkkinen M, Valtonen R 2004 Optical Materials 26 113
[8] Niittykoski J, Aitasalo T, Hölsä J, Jungner H, Lastusaari M, Parkkinen M, Tukia M 2004 J. Alloys Compd. 374 108
[9] Xie W, Wang Y H, Hu Y H, Wu H Y, Deng L Y, Liao F 2010 Acta Phys. Sin. 59 1148 (in Chinese) [谢伟, 王银海, 胡义华, 吴浩怡, 邓柳咏, 廖峰 2010 59 1148]
[10] Lin L, Yin M, Shi C S, Zhang W P, Xu M 2006 Journal of Luminescence 27 331 (in Chinese) [林林, 尹民, 施朝淑, 张慰萍, 徐美 2006 发光学报 27 331]
[11] Yue L H, Jin D L, Xu Z D 2003 Acta Chimica Sinica 61 1587 (in Chinese) [岳林海, 金达莱, 徐铸德 2003 化学学报 61 1587]
[12] Sun R, Yan W Q, Liu J, Wang X M, Kang M 2010 J. Chin. Ceram. Soc. 38 332 [孙蓉, 燕文清, 刘军, 王兴明, 康明 2010 硅酸盐学报 38 332]
[13] Wang X D, Liu X H, Chen S J, Li M, Liu M 2007 Spect. and Spect. Analy. 27 2182 (in Chinese) [王孝东, 刘晓华, 陈绍军, 黎明, 刘敏 2007 光谱学与光谱分析 27 2182]
[14] Ningthoujam R S, Sudarsan V, Kulshreshtha S K 2007 Journal of Luminescence 127 747
[15] Wu H Y, Hu Y H, Wang Y H, Kang F W, Mou Z F 2011 Optics & Laser Technology 43 1104
[16] He X H, Zhou Q F, Yu X B 2006 Rare Earth 27 86 (in Chinese) [贺香红, 周全法, 余锡宾 2006 稀土 27 86]
[17] Ju Q, Liu Y S, Li R F, Liu L Q, Luo W Q, Chen X Y 2009 J. Phys. Chem. C 113(6) 2309
[18] Zhu H M, Li R F, Luo W Q, Chen X Y 2011 Phys. Chem. Chem. Phys. 13 4411
[19] Yuan J H 2010 Acta Optica Sinica 30 1866 (in Chinese) [袁剑辉 2010 光学学报 30 1866]
[20] Peng T Q, Wang Y H, Li Y, Xiong Y 2011 Spect. and Spect. Analy. 31 3223 (in Chinese) [彭铁球, 王银海, 李亚, 熊毅 2011 光谱学与光谱分析 31 3223]
[21] Liu C B, Che G B, Xu Z L, Wang Q W 2009 J. Alloys Compd. 474 250
[22] Che G B, Lin C B, Li X Y, Xu Z L, Liu Y, Wang H 2008 Journal of Physics and Chemistry of Solids 69 2091
[23] Pan Z W, Lu Y Y, Liu F 2011 Nature Materials 11 58
[24] Diallo P T, Jeanlouis K, Boutinaud P, Mahiou R, Cousseins J C 2001 J. Alloys Compd. 323-324 218
[25] Shalgaonkar C S, Narlikar A V 1972 Journal of Materials Scinence 7 1465
[26] Li C Y, Su Q, Qiu J R 2003 Journal of Luminescence 24 19 (in Chinese) [李宇, 苏锵, 邱建荣 2003 发光学报 24 19]
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