Green light-emitting phosphor for vacuum ultraviolet-excited light-emitting device, light-emitting device including the same, and method of preparing the same

摘要

The present invention provides a green light-emitting phosphor for a light-emitting device excited by vacuum ultraviolet rays, a light-emitting device, and a method of preparing the same. The green light-emitting phosphor is represented by the formula A_xB_4-2xO_6-2x:Mn_y, wherein A is Mg, Zn, Ca, or Li, B is Al or Ga, 0.6≦x≦1.4, and 0.01≦y≦0.1. The phosphor has excellent brightness, color purity, and discharging characteristics, and a short decay time. In one embodiment, the phosphor has a stable spinel structure, and is stable with regard to external influence such as heat, ion bombardment, and vacuum ultraviolet rays. Longer-lived light-emitting devices are also disclosed.