Photoluminescence properties of green-emitting Eu~(2+)-activated Ba_3Si_6O_(12)N_2 oxynitride phosphor for white LED applications

摘要

Eu~(2+)-activated Ba_3Si_6O_(12)N_2 green-emitting phosphors were synthesized by a solid-state reaction method. X-ray diffraction patterns showed that the synthesized phosphor sintered at 1200 °C for 12 h was a Ba_3Si_6O_(12)N_2 pure phase. The synthesized phosphors were excited in UV to blue light. The emission spectra showed a broad green emission band when excited with a light at 465 nm. The highest emission intensity was observed at a Eu~(2+) concentration of 0.25 mol and the NH_4Cl concentration of the optimized flux was found to be 9 wt.%. The obtained green-emitting Ba_3Si_6O_(12)N_2:Eu~(2+) phosphors could be applied to white LED applications.