文献类型：期刊文献

英文题名：Luminescence and vacuum ultraviolet excitation spectroscopy of samarium doped SrB4O7

作者：Tuomela, Anu[1];Zhang, Meng[2];Huttula, Marko[1];Sakirzanovas, Simas[3];Kareiva, Aivaras[3];Popov, Anatoli, I[4];Kozlova, Anna P.[5];Aravindh, S. Assa[1];Cao, Wei[1];Pankratov, Vladimir[4,5,6]

机构：[1]Univ Oulu, Nano & Mol Syst Res Unit NANOMO, POB 3000, FIN-90014 Oulu, Finland;[2]East China Univ Sci & Technol, Dept Phys, Shanghai 200237, Peoples R China;[3]Vilnius Univ, Inst Chem, Naugarduko 24, LT-03225 Vilnius, Lithuania;[4]Univ Latvia, Inst Solid State Phys, 8 Kengaraga, LV-1063 Riga, Latvia;[5]Natl Univ Sci & Technol MISiS, Moscow 119049, Russia;[6]Lund Univ, MAX IV Lab, POB 118, SE-22100 Lund, Sweden

年份：2020

卷号：826

外文期刊名：JOURNAL OF ALLOYS AND COMPOUNDS

收录：;EI(收录号：20200708160692);WOS:【SCI-EXPANDED(收录号:WOS:000519269300056)】；

基金：Authors gratefully acknowledge the financial support from the Ministry of Education and Science of the Russian Federation in the framework of Increase Competitiveness Program of NUST "MISiS" (grant No. K3-2018-021); the Latvian Science Council grant lzp-2018/2-0358. Financial supports from the Academy of Finland and Fundamental Research Funds for the Central Universities (Nos. 222201714050, 222201714018) are also gratefully acknowledged.

语种：英文

外文关键词：SrB4O7; Sm2+; Sm3+; Luminescence; VUV spectroscopy; First-principles calculations; Synchrotron radiation

摘要：Sm2+ and Sm3+ co-doped SrB4O7 could be utilized in several high-level optical devices and fundamental knowledge about the optical behavior of these materials benefits the development of luminescent applications. Herein, we report luminescence and its vacuum ultraviolet (VUV) excitation spectra in samarium doped SrB4O7. Both, Sm2+ and Sm3+ luminescence centers have been examined and distinguished in the emission and the excitation spectra investigated under synchrotron radiation. The contribution of either Sm2+ or Sm3+ emission lines into the emission spectra heavily depended on the excitation energy, and strong f-f transitions of both Sm2+ and Sm3+ were detected. At 10 K, a broad intrinsic luminescence in the UV range was detected and attributed to the radiative transition of either bound or self-trapped exciton in SrB4O7. The optical behavior, including e.g. inter-configurational f-d transitions of Sm(n+) were elucidated with first-principles calculations. Partial density of states well represents the changes of the electronic states that are related to the samarium doping, which in turn explains the emerging features in excitation spectra. In summary, the obtained results clarify the excitation and emission behavior of samarium doped SrB4O7. (C) 2020 Elsevier B.V. All rights reserved.