Visual display system comprising epitaxial terbium-...

Details Visual display system comprising epitaxial terbium-... Visual display system comprising epitaxial terbium-...

G - Physics

09

F

345/7, 313/35.34

G09F 13/20 (2006.01) C09K 11/77 (2006.01)

Patent

CA 1253605

- 13 - VISUAL DISPLAY SYSTEM COMPRISING EPITAXIAL TERBIUM-ACTIVATED GARNET MATERIAL Abstract A novel epitaxial phosphor having high luminosity at about 540 nm has the composition (Y3-x-yTbxREy)(A15-wGaw)012, with RE being one (or more) 4f-type rare earth(s) other than Tb, 0.09 < x < 0.7, and 1.5 < w < 2.5. In preferred embodiments, RE is Lu, Yb, or Tm, 0.1 < x < 0.3, and 1.8 < w < 2.2. In further preferred embodiments, the phosphor composition is adjusted to yield a material having a lattice constant within 0.002 nm of the lattice constant of the substrate, typically Y3A15012. The phosphor is typically grown by liquid phase epitaxy and has application in a variety of apparatus, including avionic displays and flight simulators.

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