A RED EMITTING PHOSPHOR FOR LOW-VOLTAGE APPLICATIONS AND A METHOD OF PREPARING THE SAME

摘要

The low phosphor red phosphor of the present invention is prepared by adding a rare earth element, a Group 3A element and a Group 5A element to a phosphor matrix composed of an alkaline earth metal and an oxide of titanium. The alkaline earth metal is Mg, Sr, Ca or Ba, the rare earth element is Ce, Eu, Tb, Er, Tm, Pr or Dy, the Group 3A element is Al, Ga, In or Tl, the Group 5A element is P, As, Sb or Bi. The amount of the rare earth element added to the phosphor is 0.05 to 5 mol, the amount of the 3A group added is 0.05 to 80 mol, and the amount of the 5A group added is 0.05 to 80 mol. The red phosphor of the present invention is increased in brightness by 10 to 30 compared to the conventional phosphor by adding a group 5A element, and is applied to a low voltage display device such as VFD or FED due to a low driving voltage.