Photoluminescence and persistent luminescence properties of non-doped and Ti4+-doped Mg2SnO4 phosphors |
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| Authors: | Zhang Jia-Chi Qin Qing-Song Yu Ming-Hui Zhou Hong-Liang and Zhou Mei-Jiao |
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| Institution: | Key Laboratory for Magnetism and Magnetic Materials, Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials, Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials, Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials, Ministry of Education, Lanzhou University, Lanzhou 730000, China;Key Laboratory for Magnetism and Magnetic Materials, Ministry of Education, Lanzhou University, Lanzhou 730000, China |
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| Abstract: | Mg2SnO4 exhibits green photoluminescence and persistent luminescence, which originate from oxygen vacancies. When Ti4+ ions were doped, an interesting Mg2SnO4:Ti4+ phosphor with bluish white photoluminescence under ultraviolet irradiation and with green persistent luminescence was first obtained. Our investigation reveals that two emission centres exist in Mg2SnO4:Ti4+. The centres responsible for the green emission are considered to be the F centres (oxygen vacancies) and the blue centres are the TiO6 complex. Trap clusters in the band gap with different depths, such as SnMg‥—Oi″], SnMg‥—VO·], SnMg‥—VO×] and MgSn″, correspond to the components at 85 ℃, 146 ℃ and 213 ℃ of the thermoluminescence curve. |
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| Keywords: | phosphor Mg2SnO4 persistent luminescence photoluminescence |
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