Site Occupation of Eu2+ in Ba2-xSrxSiO4 (x=0-1.9) and Origin of Improved Luminescence Thermal Stability in the Intermediate Composition
文献类型：期刊论文
| 作者 | Lin, LT; Ning, LX; Chen, J; Huang, YC; Peng, MY; Jiang, CY; Zhou, RF; Huang, Y ; Tao, Y; Liang, HB
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| 刊名 | INORGANIC CHEMISTRY
 |
| 出版日期 | 2018 |
| 卷号 | 57期号:12页码:7090-7096 |
| ISSN号 | 0020-1669 |
| DOI | 10.1021/acs.inorgchem.8b00773 |
| 文献子类 | Article |
| 英文摘要 | Knowledge of site occupation of activators in phosphors is of essential importance for understanding and tailoring their luminescence properties by modifying the host composition. Relative site preference of Eu2+ for the two distinct types of alkaline earth (AE) sites in Ba1.9995-xSrxEu0.0005SiO4 (x = 0-1.9) is investigated based on photoluminescence measurements at low temperature. We found that Eu2+ prefers to be at the 9-coordinated AE2 site at x = 0, 0.5, and 1.0, while at x = 1.5 and 1.9, it also occupies the 10-coordinated AE1 site with comparable preference, which is verified by density functional theory (DFT) calculations. Moreover, by combining low-temperature measurements of the heat capacity, the host band gap, and the Eu2+ 4f(7), ground level position, the improved thermal stability of Eu2+ luminescence in the intermediate composition (x = 1.0) is interpreted as due to an enlarged energy gap between the emitting 5d level and the bottom of the host conduction band (CB), which results in a decreased nonradiative probability of thermal ionization of the 5d electron into the host CB. Radioluminescence properties of the samples under X-ray excitation are finally evaluated, suggesting a great potential scintillator application of the compound in the intermediate composition. |
| 电子版国际标准刊号 | 1520-510X |
| WOS关键词 | AUGMENTED-WAVE METHOD ; CHARGE-TRANSFER ; ENHANCED PHOTOLUMINESCENCE ; STRUCTURAL RIGIDITY ; ENERGY-TRANSFER ; AB-INITIO ; PHOSPHORS ; OXIDE ; CE3+ |
| WOS研究方向 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000436023800038 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/286077]  |
| 专题 | 高能物理研究所_多学科研究中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Lin, LT,Ning, LX,Chen, J,et al. Site Occupation of Eu2+ in Ba2-xSrxSiO4 (x=0-1.9) and Origin of Improved Luminescence Thermal Stability in the Intermediate Composition[J]. INORGANIC CHEMISTRY,2018,57(12):7090-7096. |
| APA | Lin, LT.,Ning, LX.,Chen, J.,Huang, YC.,Peng, MY.,...&陶冶.(2018).Site Occupation of Eu2+ in Ba2-xSrxSiO4 (x=0-1.9) and Origin of Improved Luminescence Thermal Stability in the Intermediate Composition.INORGANIC CHEMISTRY,57(12),7090-7096. |
| MLA | Lin, LT,et al."Site Occupation of Eu2+ in Ba2-xSrxSiO4 (x=0-1.9) and Origin of Improved Luminescence Thermal Stability in the Intermediate Composition".INORGANIC CHEMISTRY 57.12(2018):7090-7096. |
入库方式： OAI收割
来源：高能物理研究所
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