文摘
An energy level scheme of the NaCa2GaGe5O14:Ln3+/Ln2+ phosphors has been constructed by collecting spectroscopy data. The energy level positions of Ln2+/Ln3+ can be used to gain insight into the photoluminescence and long persistent luminescence properties of the NaCa2GaGe5O14:Ln3+/Ln2+ phosphors and the ability of Ln3+ codopants as foreign electron traps. All the theoretical predictions have been confirmed by the experimental results. For this case, this energy level scheme is reliable and can be used as a transferable empirical tool to study the luminescent properties of known phosphors, and even guide the further development of new phosphors.