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| 纳米Gd2O3中两种格位Eu3+的电荷迁移态激发跃迁 | |
| 引用本文： | 刘春旭,张家骅,吕少哲,刘俊业,花景田. 纳米Gd2O3中两种格位Eu3+的电荷迁移态激发跃迁[J]. 发光学报, 2004, 25(2): 193-196 |
| 作者姓名： | 刘春旭 张家骅 吕少哲 刘俊业 花景田 |
| 作者单位： | 中国科学院长春光学精密机械与物理研究所,激发态物理重点实验室,吉林,长春,130033;长春职业技术学院,吉林,长春,130021 |
| 基金项目： | 国家自然科学基金资助项目(50172047,10174078,10274083和60308008) |
| 摘 要： | 观测了粒径分别为15，23，135m的立方相Gd2O3：Eu^3 的选择激发光谱、发射光谱和激发光谱。受强量子限域效应的影响，纳米Gd2O3：Eu^3 的激发光谱的强度表现出对颗粒尺寸的明显依赖性。用Jorgensen公式计算电荷迁移带的位置，与实验测得激发光谱中位置相一致。通过电荷迁移带不同位置的选择激发光谱可以分辨出立方相Gd2O3：Eu^3 中C2和S6格位Eu^3 的发光，从选择激发的发射光谱和激发光谱结果计算出C2和S6格位电荷迁移带的激发光谱，与实验结果相符合。 |
| 关 键 词： | Gd2O3:Eu3+纳米晶 电荷迁移带 格位选择激发光谱 |
| 文章编号： | 1000-7032(2004)02-0193-04 |
| 修稿时间： | 2003-10-05 |
Charge Transfer Excitation of Eu3+ with Two-sites in Nanocrystal Gd2O3:Eu3+ |
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| LIU Chun-xu,ZHANG Jia-hua,LU Shao-zhe,LIU Jun-ye,HUA Jing-tian Key Laboratory of Excited state Processes,changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun ,China Changchun Institute of Professional Technique,Changchun ,China. Charge Transfer Excitation of Eu3+ with Two-sites in Nanocrystal Gd2O3:Eu3+[J]. Chinese Journal of Luminescence, 2004, 25(2): 193-196 | |
| Authors: | LIU Chun-xu ZHANG Jia-hua LU Shao-zhe LIU Jun-ye HUA Jing-tian Key Laboratory of Excited state Processes changchun Institute of Optics Fine Mechanics Physics Chinese Academy of Sciences Changchun China Changchun Institute of Professional Technique Changchun China |
| Affiliation: | LIU Chun-xu,ZHANG Jia-hua,LU Shao-zhe,LIU Jun-ye,HUA Jing-tian Key Laboratory of Excited state Processes,changchun Institute of Optics,Fine Mechanics and Physics,Chinese Academy of Sciences,Changchun 130033,China Changchun Institute of Professional Technique,Changchun 130021,China |
| Abstract: | This paper reports the site-selective excited emission, fluorescence and photoluminescence excitationspectroscopy of cubic Gd_2O_3: Eu~(3+) nanocrystals with diameters of 15, 23, 135 nm. The intensity distribution of pho-toluminescence spectra of Gd_2O_3: Eu~(3+) nanocrystal depends on the size of nanocrystal, as a result of strong quantumconfinement effect. The position of charge transfer band (CTB) calculated by Jorgensen formula is consistent withthe experiment results. The emission peaks of C_2 and S_6 sites Eu~(3+) in cubic Gd_2O_3: Eu~(3+) are dissolved by the site-selective spectra excited with wavelengths in the CTB. The photoluminescence excitation spectra of C_2 and S_6 sitesEu~(3+) CTB are worked out through the site-selective excitation spectra and photoluminescence excitation spectra. Itagrees well with the experiment results. |
| Keywords: | Gd_2O_3 Eu~(3+)nanocrystal charge transfer band site-selective excitation spectra |
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