University of Oulu

Anu Tuomela, Meng Zhang, Marko Huttula, Simas Sakirzanovas, Aivaras Kareiva, Anatoli I. Popov, Anna P. Kozlova, S. Assa Aravindh, Wei Cao, Vladimir Pankratov, Luminescence and vacuum ultraviolet excitation spectroscopy of samarium doped SrB4O7, Journal of Alloys and Compounds, Volume 826, 2020, 154205, ISSN 0925-8388,

Luminescence and vacuum ultraviolet excitation spectroscopy of samarium doped SrB₄O₇

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Author: Tuomela, Anu1; Zhang, Meng2; Huttula, Marko1;
Organizations: 1Nano and Molecular Systems Research Unit (NANOMO), University of Oulu, P.O. Box 3000, FIN-90014, Finland
2Department of Physics, East China University of Science and Technology, Shanghai, 200237, People’s Republic of China
3Institute of Chemistry, Vilnius University, Naugarduko 24, LT-03225, Vilnius, Lithuania
4Institute of Solid State Physics, University of Latvia, 8 Kengaraga, LV-1063, Riga, Latvia
5National University of Science and Technology MISiS, Leninsky Prospekt, Moscow, 119049, Russia
6MAX IV Laboratory, Lund University, P.O. Box 118, SE-221 00, Lund, Sweden
Format: article
Version: accepted version
Access: embargoed
Persistent link:
Language: English
Published: Elsevier, 2020
Publish Date: 2022-02-06


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.

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Series: Journal of alloys and compounds
ISSN: 0925-8388
ISSN-E: 1873-4669
ISSN-L: 0925-8388
Volume: 826
Article number: 154205
DOI: 10.1016/j.jallcom.2020.154205
Type of Publication: A1 Journal article – refereed
Field of Science: 114 Physical sciences
Funding: 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. К3-2018-021); 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.
Copyright information: © 2020 Elsevier B.V. This manuscript version is made available under the CC-BY-NC-ND 4.0 license