A new luminescent material, SrZnO2:Tb3+

In this paper, a new green-emitting phosphor, SrZnO2:Tb3+, has been synthesized by conventional solid-state reaction. It was found that under ultraviolet excitation with a wavelength of 250 or 262 nm, the phosphor presented green luminescence that was attributed to the transitions from 5D4 excited states to 7FJ (J=3-6) ground states of Tb3+ ions. The emission spectra were different in terms of shape and relative intensity with different exciting wavelength, which indicated that two different luminescence centers are possibly formed when Tb3+ ions dope into SrZnO2 host lattice. The luminescent intensity of SrZnO2:Tb3+ with different Tb3+ concentrations was also investigated and reported.