Doped amorphous and crystalline alkaline earth gallates as elect

Details Doped amorphous and crystalline alkaline earth gallates as elect Doped amorphous and crystalline alkaline earth gallates as elect

1997-01-23

1998-08-04

Bonner, Melissa

Compositions

Inorganic luminescent compositions

Compositions containing halogen; e.g., halides and oxyhalides

313563, 313509, C04B 3500, C09K 1180, C09K 1155

Patent

active

057888825

ABSTRACT:
New phosphors based on doped alkaline earth gallates for electroluminescent (EL) display materials. Bright red EL has been obtained in amorphous and crystalline alkaline earth gallates doped with europium. Powder targets of nominal compositions Sr.sub.4 Ga.sub.2 O.sub.7, Sr.sub.7 Ga.sub.4 O.sub.13, Sr.sub.3 Ga.sub.2 O.sub.6, Sr.sub.3 Ga.sub.4 O.sub.9, SrGa.sub.4 O.sub.7, SrGa.sub.12 O.sub.19, Ba.sub.4 Ga.sub.2 O.sub.7, Ba.sub.3 Ga.sub.2 O.sub.6 and Ca.sub.3 Ga.sub.4 O.sub.9 doped with 1-2% Eu, were RF magnetron sputtered onto BaTiO.sub.3 substrates. Both annealed and as-deposited films yielded bright EL emission in the red part of the visible spectrum with peaks characteristic of the Eu.sup.3+ ion.

REFERENCES:
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