White light-emitting glass, glass-covered light-emitting element, and light-emitting device
AssigneesKyoto University, Asahi Glass Company, Limited
InventorsHirokazu Masai, Toshinobu Yoko, Takumi Fujiwara, Syuji Matsumoto
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Abstract
A glass emitting white light in itself, and a light-emitting element and a light-emitting device covered with the glass as stated above are provided. The white light-emitting glass is a glass emitting fluorescence at a region having a wavelength of 380 nm to 750 nm by excitation light with a wavelength of 240 nm to 405 nm, not containing crystal, and containing SnOx (where x=1 to 2, typically x=1 or 2), P2O5, and MnOy (where y=1 to 2, typically y=1 or 2). The light-emitting element and the light-emitting device are made up by covering a main surface of a semiconductor light-emitting element with the glass as stated above.
Claims8
A white light-emitting glass emitting fluorescence at a region having a wavelength of 380 nm to 750 nm by excitation light with a wavelength of 240 nm to 405 nm and not containing a crystal, the glass consisting essentially of:
- from 27.5% to 44.4% of P2O5;
- from 0.1% to 40% of SnOx;
- from 30% to 71% of ZnO;
- from 0% to 10% of MmOn;
- and
- from 0.1% to 2.4% of MnOy,
- percentages being based on a total amount of the above-stated components expressed in mol % on an oxide basis,
- wherein:
- x=1 to 2;
- y=1 to 2;
- M is an element selected from the group consisting of Ti, Zr, V, Nb, Cr, Ni, Cu, B, Al, Si, Cl, Ga, Ge, As, Se, Cd, In, Sb, Te, Hg, Tl, Bi, S and a rare-earth element;
- m and n are independently integers of 1 or more;
- and
- the glass does not substantially contain Li2O, Na2O and K2O.
Dependencies are inferred from the claim text.