Tunable electronic band structure, luminescence properties and thermostability of (Gd1-xLax)2Si2O7:Ce scintillator by adjusting La/Gd ratio* | |
Wei, QH (Wei, Qinhua) 1; Zhou, ZZ (Zhou, Zhenzhen) 2; Zhang, WJ (Zhang, Weijie) 1; Tang, G (Tang, Gao) 1; Liu, Q (Liu, Qian) 2; Qin, LS (Qin, Laishun) 1; Shi, HS (Shi, Hongsheng) 3 | |
刊名 | JOURNAL OF RARE EARTHS |
2021 | |
卷号 | 39期号:6页码:657-665 |
关键词 | First-principles calculationsScintillatorBand structure tunableLuminescence propertiesRare earths |
ISSN号 | 1002-0721 |
DOI | 10.1016/j.jre.2020.09.011 |
英文摘要 | Mixed crystal strategy is an effective approach of improving the luminescence properties of optical materials and has been adopted widely in many systems. In this paper, the La-mixed Gd2Si2O7:Ce polycrystalline samples were successfully synthesized by a sol-gel method. The crystal structure and luminescence properties were confirmed and discussed by XRD, UV-Vis luminescence spectra, and XEL, respectively. The vacuum ultraviolet excitation spectra and thermoluminescence glow curves were also systematically investigated and discussed at varied temperature. A combination of the first-principles calculations and optical characterization experiments was employed to study the electronic band structure of host material, revealing that the band gap is narrowed and the 5d1 level of Ce3+ shifts to higher energy as the La content increases. The luminescence thermo-stability and activation energy were also measured and calculated. It indicates that thermo-stability is strongly dependent on the La concentration. An effective approach is developed to tune the electronic band structure, luminescence properties and thermostability of (Gd1-xLax)2Si2O7:Ce scintillator by adjusting La/Gd ratio. |
WOS记录号 | WOS:000646992200006 |
内容类型 | 期刊论文 |
源URL | [http://ir.xjipc.cas.cn/handle/365002/7849] |
专题 | 新疆理化技术研究所_材料物理与化学研究室 |
作者单位 | 1.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China 3.China Jiliang Univ, Coll Mat & Chem, Hangzhou 310018, Peoples R China |
推荐引用方式 GB/T 7714 | Wei, QH ,Zhou, ZZ ,Zhang, WJ ,et al. Tunable electronic band structure, luminescence properties and thermostability of (Gd1-xLax)2Si2O7:Ce scintillator by adjusting La/Gd ratio*[J]. JOURNAL OF RARE EARTHS,2021,39(6):657-665. |
APA | Wei, QH .,Zhou, ZZ .,Zhang, WJ .,Tang, G .,Liu, Q .,...&Shi, HS .(2021).Tunable electronic band structure, luminescence properties and thermostability of (Gd1-xLax)2Si2O7:Ce scintillator by adjusting La/Gd ratio*.JOURNAL OF RARE EARTHS,39(6),657-665. |
MLA | Wei, QH ,et al."Tunable electronic band structure, luminescence properties and thermostability of (Gd1-xLax)2Si2O7:Ce scintillator by adjusting La/Gd ratio*".JOURNAL OF RARE EARTHS 39.6(2021):657-665. |
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