Luminescent properties of Tb3+-doped Ca2SnO4 phosphor

► The photoluminescence properties of Ca2SnO4: Pr3+ was investigated systematically. ► The long afterglow was observed in Ca2SnO4: Pr3+ phosphor for the first time. ► The optimized concentration of Pr3+ ions was experimentally to be 0.3 mol%. ► The mechanism of long afterglow was discussed in detail.