Low-voltage cathodoluminescent red emitting phosphors for field emission displays

Spherical, sub-micrometre Y2O3:Eu3+ and cubic (Y2−(x+y)Gdx)O3:image (where image, image) phosphor particles have been synthesized by a novel homogeneous precipitation method. These cubic-Y2O3:Eu spherical phosphor particles (ca. 300 nm) will be ideal for FED devices as they can densely close-pack on screens (as shown herein) and they display high luminous efficiency under low-voltage electron beam excitation. It is also shown herein that these particles are useful in voltage ranges up to 5000 V and perform well at such voltages.