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. The investigation revealed that two emission centres existed in Mg2SnO4:Ti4+. The centres responsible for the green emission were considered to be the F centres (oxygen vacancies) and the blue centres were the TiO6 complex. Trap clusters in the band gap with different depths, such as [Sn••Mg−O''i], [Sn••Mg−V•O], [Sn••Mg−VxO] and Mg''Sn, correspond to the components at 85, 146 and 213C of the thermoluminescence curve.

Photoluminescence and Persistent Luminescence Properties of Non-Doped and Ti4+-Doped Mg2SnO4 Phosphors. J.C.Zhang, Q.S.Qin, M.H.Yu, H.L.Zhou, M.J.Zhou: Chinese Physics B, 2011, 20[9], 094211