Luminescence properties of a green-emitting mechanoluminescent phosphor CaSrGa 4 O 8 : x Tb 3+ without pre-excitation

ions. Investigations into the intrinsic structure, matrix effects, and trap evolution of the material confirmed that deep and shallow traps are responsible for the observed ML and LPL phenomena, respectively. The elucidation of the unique luminescent properties of the material provides us with some guidance for the development of new multi-functional luminescent materials.