Synthesis and characterization of fast-decaying bluish green phosphors of Tb3+-doped CaSi2O2N2 for 2D/3D plasma display panels

Oxynitride phosphor powders comprising of CaSi2O2N2 doped with Tb3+ were successfully synthesized using a high-temperature solid-state reaction method. The experimentally determined photoluminescence (PL) properties of the produced phosphors meet the requirements of 2D/3D plasma display panels (PDPs). In particular, under the excitation of vacuum ultraviolet (VUV) synchrotron radiation and ultraviolet (UV) irradiation, emission peaks corresponding to the 5D3→7FJ (J=6, 5, 4, 3) and 5D4→7FJ (J=6, 5, 4, 3) transitions of Tb3+ ions were recorded. Monitoring the 5D4→7F5 emission of Tb3+ at 545 nm, the excitation bands were assigned to the host-related absorption as well as the 4f-5d (fd) and the 4f-4f (ff) transitions of Tb3+. The produced phosphors can be efficiently excited at 147 nm, and have an adequately short decay time (τ1/10=1.14 ms).

► Tb3+-doped CaSi2O2N2 was proved to be a candidate for plasma display panels (PDPs). ► PL and PLE spectra from VUV to visible range of the phosphor were analyzed. ► The phosphor has an adequately short decay time that is necessary for 3D displays.