Preparation and properties of long afterglow in alkaline earth silicate phosphors co-doped by Eu2O3 and Dy2O3

That main emission peaks appeared at 469 nm and belonging to a broad-emission is ascribed to the 4f7→4f65d1 transition of Eu2+ in the pigment matrix. The pigment doped only with Eu ions did not have the long afterglow phenomenon. But while co-doped Dy3+ ions in the pigment matrix, the obvious long afterglow was observed, and its decay process contained fast-decay and slow-decay processes.