| Ca2GeO4 ∶Eu3+ 的电子结构和紫外-真空紫外发光特性的研究 |
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| 引用本文： | 秦青松,于明汇,周宏亮,周美娇,项晓天,李晓的,曾俊玺,张加驰.Ca2GeO4 ∶Eu3+ 的电子结构和紫外-真空紫外发光特性的研究[J].物理学报,2011,60(6):67802-067802. |
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| 作者姓名： | 秦青松 于明汇 周宏亮 周美娇 项晓天 李晓的 曾俊玺 张加驰 |
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| 作者单位： | 兰州大学磁学与磁性材料教育部重点实验室, 兰州 730000 |
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| 基金项目： | 国家自然科学青年科学基金(批准号: 502041032)和国家大学生创新实验计划(批准号:101073005)资助的课题. |
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| 摘 要： | 采用高温固相法合成了发光材料Ca2GeO4 ∶Eu3+ ,并详细研究了其紫外-真空紫外发光特性. 发现并解释了Eu3+ 离子在空气中的自还原以及在不同波长激发下的颜色转换现象. Ca2GeO4 ∶Eu3+ 在163—230和301,466 nm处具有强激发带,表明Ca2GeO4 ∶Eu3+
关键词：
2GeO4 ∶Eu3+')" href="#">Ca2GeO4 ∶Eu3+
光致发光机理
空气中自还原
颜色转换
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| 关 键 词： | Ca2GeO4 ∶Eu3+ 光致发光机理 空气中自还原 颜色转换 |
| 收稿时间： | 8/1/2010 12:00:00 AM |
Electronic structure and photoluminescence properties of Ca_2GeO_4:Eu_(3+) in ultraviolet and vacuum ultraviolet region |
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| Qin Qing-Song,Yu Ming-Hui,Zhou Hong-Liang,Zhou Mei-Jiao,Xiang Xiao-Tian,Li Xiao-Di,Zeng Jun-Xi,Zhang Jia-Chi.Electronic structure and photoluminescence properties of Ca_2GeO_4:Eu_(3+) in ultraviolet and vacuum ultraviolet region[J].Acta Physica Sinica,2011,60(6):67802-067802. |
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| Authors: | Qin Qing-Song Yu Ming-Hui Zhou Hong-Liang Zhou Mei-Jiao Xiang Xiao-Tian Li Xiao-Di Zeng Jun-Xi Zhang Jia-Chi |
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| Institution: | Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials of Ministry of Education, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | Red emitting Ca2GeO4 ∶Eu3+ phosphors are synthesized by solid state method. The ultraviolet and vacuum ultraviolet excited photoluminescence properties are investigated in detail. The phenomenon of reduction of Eu3+ ions in air and the color switches are discovered and explained. The Ca2GeO4 ∶Eu3+ presents intense excitation intensities at 163—230, 301 and 466 nm, showing the potential applications in plasma display panels and light emitting diodes. The excitation spectra are studied to identify the photoluminescence mechanism of Ca2GeO4 ∶Eu3+ . First principles calculation within the local density approximation of the density functional theory is used to calculate the electronic structure and the linear optical properties of Ca2GeO4. |
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| Keywords: | Ca2GeO4:Eu3 photoluminescence mechanism reduction in air color switch |
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