Fluorescent material

Details Fluorescent material Fluorescent material

1997-04-22

1999-11-02

Koslow, C. Melissa

Compositions

Inorganic luminescent compositions

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

2823016R, 501 961, 423409, C09K 1162

Patent

active

059764120

ABSTRACT:
A fluorescent material is described which remains uninfluenced in the presence of oxygen during fabrication, allows a highly efficient light emission due to the concentration of donors being adjustable as appropriate, and is excellent in giving a bright light and having a long life. The fluorescent material is represented by the formula Ga.sub.1-x In.sub.x N:M,X, wherein 0.ltoreq.x<0.8, M is at least one element selected from the group of Be, Mg, Ca, Sr, Ba, Zn, Cd and Hg, and X is at least one element selected from the group of C, Si, Ge, Sn and Pb. The fluorescent material preferably has concentration ranges (mol %) of the elements M and X of 0.005<M<0.7 and 0.002<X<0.8. The starting materials utilized for preparing the fluorescent material are substances devoid of oxygen, preferably (SiH.sub.a N.sub.b).sub.n where a=1-3, b=0 or 1, and n=an integer of 1 or more.

REFERENCES:
patent: 5319121 (1994-06-01), Blum
patent: 5625202 (1997-04-01), Chai
patent: 5650641 (1997-07-01), Sassa et al.
patent: 5652438 (1997-07-01), Sassa et al.
patent: 5693963 (1997-12-01), Fujimoto et al.

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