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Photoluminescence and persistent luminescence properties of non-doped and Ti4+-doped Mg2SnO4 phosphors |
Zhang Jia-Chi(张加驰)†, Qin Qing-Song(秦青松), Yu Ming-Hui(于明汇), Zhou Hong-Liang(周宏亮), and Zhou Mei-Jiao(周美娇) |
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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Received: 02 March 2011
Revised: 30 April 2011
Accepted manuscript online:
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PACS:
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42.70.-a
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(Optical materials)
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Cite this article:
Zhang Jia-Chi(张加驰), Qin Qing-Song(秦青松), Yu Ming-Hui(于明汇), Zhou Hong-Liang(周宏亮), and Zhou Mei-Jiao(周美娇) Photoluminescence and persistent luminescence properties of non-doped and Ti4+-doped Mg2SnO4 phosphors 2011 Chin. Phys. B 20 094211
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