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 SrZnO7 host lattice. The luminescent intensity of SrZnO2:Tb3+ with different Tb3+ concentrations was also investigated and reported.