Electric lamp and discharge devices – Cathode ray tube – Screen
Patent
1985-01-16
1988-07-12
Moore, David K.
Electric lamp and discharge devices
Cathode ray tube
Screen
2523014R, H01J 2920, C09K 1146
Patent
active
047572329
ABSTRACT:
A novel epitaxial phosphor having high luminosity at about 540 nm has the composition (Y.sub.3-x-y Tb.sub.x RE.sub.y)(Al.sub.5-w Ga.sub.w)O.sub.12, 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 Y.sub.3 Al.sub.5 O.sub.12. The phosphor is typically grown by liquid phase epitaxy and has application in a variety of apparatus, including avionic displays and flight simulators.
REFERENCES:
patent: 4180477 (1979-12-01), Barnes
SID International Symposium Digest of Technical Papers (1983), by B. R. Critchley et al, pp. 122-123.
Philips J. Research, vol. 35 (1980), "Thin Single Crystalline Phosphor Layers Grown by Liquid Phase Epitaxy" by J. M. Robertson et al, pp. 354-371.
Luminescene of Inorganic Solids, P. Goldberg, Editor, Academic Press, New York (1966), pp. 2-52.
Physical Review B, vol. 19(2), Jan. 15, 1979, "Investigation of Competitive Recombination Processes in Rare-Earth Activated Garnet Phosphors" by D. J. Robbins et al, pp. 1254-1269.
Applied Physics Letters 37(5), Sep. 1, 1980, "Epitaxially Grown Monocrystalline Garnet Cathode-Ray Tube Phosphor Screens", by J. M. Robertson et al, pp. 471-472.
Philips J. Research, vol. 36, No. 1 (1981), "Colourshift of the Ce.sup.+ Emission in Monocrystalline Epitaxially Grown Garnet Layers" by J. M. Robertson et al, pp. 15-30.
Thin Solid Films, 114 (1984), "Cathodoluminescent Garnet Layers" by J. M. Robertson et al, pp. 221-240.
Solid State Communications, vol. 36 (1980), "Comparison of Theoretical and Measured Efficiences for Tb.sup.3+ -Activated Garnet Oxide Phosphors", pp. 691-693.
Berkstresser George W.
Huo Tai-Chan D.
Shmulovich Joseph
American Telephone and Telegraph Company AT&T Bell Laboratories
Moore David K.
Pacher Eugen E.
Wieder K.
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