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Energy Transfer in Cubic PbF_(2):gd Crystals

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Chinese Physics Letters 2001年第6期18卷 829-830页

作者： ZHANg guo-Bin SHI Jun-Yan ZHANg Zeng-Ming HAN Zheng-Fu SHI Chao-Shu ZHANg Xin-Yi g.zimmerer M.Kirm SHEN Ding-Zhong National Synchrotron Radiation Laboratory University of Science and Technology of ChinaHefei 230026 Department of Astronomy and Applied Physics University of Science and Technology of ChinaHefei 230026 II Institut für Experimental Physik der Universität Hamburg 22607 HamburgGermany Shanghai Institute of Ceramic Chinese Academy of SciencesShanghai 200050

The emission and excitation spectra of cubic PbF_(2):gd were *** with pure crystals,the emissions from gd^(3+) were observed upon cation exciton excitation in lattices,while the emission from intrinsic self-trapped ex... 详细信息

关键词： excitation cubic pure

Temperature Dependence of the Luminescence Decay Time of a PbWO_(4) Scintillator

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Chinese Physics Letters 1998年第6期15卷 455-456页

作者： SHI Chao-shu DENg Jie HAN Zheng-fu XIE Zhi-jian LIAO Jing-ying g.zimmerer J.Beker M.Kamada M.Runne A.Schröder Department of Physics University of Science and Technology of ChinaHefei 230026 NSRL University of Science and Technology of ChinaHefei 230026 Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050 II.Institut für Experimental Physik der Universität Hamburg Germany UVSOR Institute of Molecular ScienceJapan

Experimental results are given for the temperature dependence of the decay time of the emission at 430nm from PbWO_(4) crystal under vacuum-ultraviolet(82nm)photon excitation in the temperature range of *** structures in the curve are interpreted for the first time by studying the thermoluminescence of PbWO_(4),which originates from the traps in the crystal.

关键词： crystal ultraviolet excitation

gdPO_4∶Eu^(3+)和gdBO_3∶Eu^(3+)中“gd-Eu”间的能量传递

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中国稀土学报 2005年第4期23卷 429-433页

作者：陈永虎刘波施朝淑 zimmerer g 中国科学技术大学物理系安徽合肥230026 Institut für Experimentalphysik der Universitt Hamburg

利用同步辐射光源(德国HASYLAB实验室的SUPERLUMI实验站)对高温固相法制备的gdPO4∶Eu3+和gdBO3∶Eu3+的发射谱与激发谱进行了研究,并从量子剪裁的角度对“gd3+-Eu3+”之间的能量传递作了讨论。在两种样品监测Eu3+红光发射的激发谱上,... 详细信息

利用同步辐射光源(德国HASYLAB实验室的SUPERLUMI实验站)对高温固相法制备的gdPO4∶Eu3+和gdBO3∶Eu3+的发射谱与激发谱进行了研究,并从量子剪裁的角度对“gd3+-Eu3+”之间的能量传递作了讨论。在两种样品监测Eu3+红光发射的激发谱上,都显著观察到了对应gd3+离子4f-4f跃迁的谱线,说明从基质中gd3+离子向掺杂的Eu3+离子之间存在非常有效的能量传递,这有利于量子剪裁的发生。在激发谱上还观察到了对应Eu3+-O2-电荷迁移态的宽激发带(180~270nm),而对应gd3+离子8S7/2→6gJ跃迁的谱线(196nm,203nm)叠加在这个宽带之上,微弱可辨,这不利于gd3+-Eu3+间交叉弛豫的能量传递过程,从而不利于量子剪裁的发生。结合Eu3+-O2-电荷迁移态位置变化的规律,提出了如何避开其干扰以增强量子剪裁效应的材料设计方案。

关键词：发光材料量子剪裁真空紫外(VUV) 电荷迁移态(CTS) gdPO4∶Eu3+ gdBO3∶Eu3+ 稀土

VUV Spectroscopy of gdPO4∶Eu3+ and gdBO3∶Eu3+

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Journal of Rare Earths 2005年第4期 428-428页

作者： zimmerer g Luruper Chaussee 149 Institut für Experimentalphysik der Universitt Hamburg germany 22761 Hamburg

The emission and the excitation spectra of gdPO4∶Eu3+ and gdBO3∶Eu3+ prepared by solid state reaction method were investigated using the synchrotron radiation source of SUPERLUMI station of HASYLAB. The energy transfer between gd3+ and Eu3+ was discussed with the probability of quantum cutting process. In the excitation spectra monitoring the red emission from Eu3+, the distinct lines corresponding to the intraconfigurational 4f-4f transitions from gd3+ were observed for both samples, indicating an efficient energy transfer from host gd3+ ions to the doped Eu3+ ions. The efficient energy transfer is necessary for the quantum cutting process based on the two-step energy transfer from gd3+ to Eu3+. However, the overlapping of the lines corresponding to gd3+∶8S7/2→6gJ and the broad excitation band （180～270 nm） due to Eu3+-O2- charge transfer states （CTS） around 200 nm cause excitation energy on （）6gJ levels to dissipate into CTS by direct energy transfer, unfavorable to the cross relaxation energy transfer between gd3+ and Eu3+, thus unfavorable to the quantum cutting process. With the help of the general rules governing the energy positions of Eu3+-O2-∶CTS, the suggestions concerning searching suitable oxide hosts for gd3+-Eu3+ quantum cutting were made.

关键词： luminescent materials quantum cutting VUV CTS gdPO4∶Eu3+ gdBO3∶Eu3+ rare earths

长余辉材料Sr_2MgSi_2O_7∶Eu^(2+),Dy^(3+)中稀土离子的发光特性

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发光学报 2006年第1期27卷 41-46页

作者：陈永虎施朝淑 KIRM M TRUE M VIELHAUER S zimmerer g 中国科学技术大学物理系 Institut für Experimentalphysik der Universitat Hamburg Luruper Chaussee14922761 HamburgGermany

利用同步辐射光源(德国HASYLAB实验室的SUPERLUMI实验站)和真空紫外激光(157.6nm)对新型蓝光发射长余辉材料Sr2MgSi2O7∶Eu2+(0·2%),Dy3+(8%)进行了光谱研究。在170nm同步辐射光源激发下,观察到对应Eu2+:5d-4f跃迁的477nm发射带和对应D... 详细信息

利用同步辐射光源(德国HASYLAB实验室的SUPERLUMI实验站)和真空紫外激光(157.6nm)对新型蓝光发射长余辉材料Sr2MgSi2O7∶Eu2+(0·2%),Dy3+(8%)进行了光谱研究。在170nm同步辐射光源激发下,观察到对应Eu2+:5d-4f跃迁的477nm发射带和对应Dy3+:4f-4f跃迁的两组线谱发射,其中只有来自Eu2+的5d-4f发射对长余辉光谱有贡献。在157.6nm激光激发下,除了上述发射外,还明显观察到对应Eu3+的红色线谱(590,614,626nm)。结合这些光谱特性,对Sr2MgSi2O7∶Eu2+,Dy3+中稀土离子的发光特性以及长余辉发光机理进行了讨论,并提出了Eu2+充当空穴陷阱的可能性。

关键词：长余辉材料稀土 Sr2MgSi2O7:Eu^2+,Dy^3+ 发光

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Si基沉积ZnO薄膜的光谱特性

发光学报 2001年第2期22卷 157-159页

作者：张国斌施朝淑韩正甫石军岩林碧霞 Kirm M zimmerer g 中国科学技术大学国家同步辐射实验室安徽合肥230029 中国科学技术大学物理系安徽合肥230026 Institut for experimental physik der university Hamburg

利用同步辐射真空紫外光研究了Si基沉积ZnO薄膜的发射光谱、激发光谱及其温度依赖。首次观测到高于ZnO禁带宽度的发射带 ( 2 90nm) ,并初步指定其来源。

关键词：光致发光同步辐射氧化锌薄膜半导体

VUV Spectroscopy of gdPO_4∶Eu^(3+) and gdBO_3∶Eu^(3+)

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Journal of Rare Earths 2005年第4期23卷 428-428页

作者： Chen Yonghu Liu Bo Shi Chaoshu zimmerer g Department of Physics University of Science and Technology of China Hefei 230026 China Institut fǖr Experimentalphysik der Universitaet Hamburg Luruper Chaussee 149 22761 Hamburg Germany

The emission and the excitation spectra of gdPO4 ： Eu^3＋ and gdBO3： Eu^3 ＋ prepared by solid state reaction method were investigated using the synchrotron radiation source of SUPERLUMI station of HASYLAB. The energy transfer between gd^3＋ and Eu^3＋ was discussed with the probability of quantum cutting process. In the excitation spectra monitoring the red emission from Eu^3＋ , the distinct lines corresponding to the intraconfigurational 4f-4f transitions from gd^3＋ were observed for both samples, indicating an efficient energy transfer from host gd^3＋ ions to the doped Eu^3＋ ions. The efficient energy transfer is necessary for the quantum cutting process based on the two-step energy transfer from gd^3＋ to Eu^3＋ . However, the overlapping of the lines corresponding to gd^3＋：^8S7/2→^6gJ and the broad excitation band （180 - 270 nm） due to Eu^3＋- O^2- charge transfer states （CTS） around 200 nm cause excitation energy on ^6gJ levels to dissipate into CTS by direct energy transfer, unfavorable to the cross relaxation energy transfer between gd^3＋ and Eu^3＋, thus unfavorable to the quantum cutting process. With the help of the general rules governing the energy positions of Eu^3＋-O^2- ：CTS, the suggestions concerning searching suitable oxide hosts for gd^3＋-Eu^3＋ quantum cutting were made.

关键词： luminescent materials quantum cutting VUV CTS gdPO4:Eu^3+ gdBO3:Eu^3+ rare earths

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ZnO薄膜的特殊光谱性质及其机理

发光学报 2004年第3期25卷 272-276页

作者：施朝淑张国斌陈永虎林碧霞孙玉明徐彭寿傅竹西 Kirm M zimmerer g 中国科学技术大学国家同步辐射实验室安徽合肥230029 中国科学技术大学物理系安徽合肥230026 德国汉堡大学第Ⅱ实验物理研究所

以同步辐射真空紫外光 (1 95nm)为激发源 ,在低温下观察到Si基衬底上ZnO薄膜的发光有三种紫外发射 ,其峰值波长分别为 380 ,36 9.5 ,2 90nm。它们各自具有不同的衰减时间和不同的温度依赖关系 ,但其激发谱相同。强激发带不在近紫外区 ,... 详细信息

以同步辐射真空紫外光 (1 95nm)为激发源 ,在低温下观察到Si基衬底上ZnO薄膜的发光有三种紫外发射 ,其峰值波长分别为 380 ,36 9.5 ,2 90nm。它们各自具有不同的衰减时间和不同的温度依赖关系 ,但其激发谱相同。强激发带不在近紫外区 ,而在真空紫外区 (1 0 0～ 2 0 0nm) ,可能源于ZnO的下价带 (Zn3d组态 )电子的激发。

关键词： ZnO薄膜发光真空紫外光谱特性

gdPO4:Eu3+和gdBO3:Eu3+的VUV光谱研究

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GdPO4:Eu3+和GdBO3:Eu3+的VUV光谱研究