Fluorescent substance, method for producing the same, and light-emitting device using the same
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United States of America Patent
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Aug 20, 2013
Grant Date -
Jul 1, 2010
app pub date -
May 1, 2008
filing date -
May 22, 2007
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Abstract
The present invention provides a fluorescent substance exhibiting higher brightness as compared to conventional fluorescent substances, a method for producing the same, and a light-emitting device using such a fluorescent substance. Specifically, the fluorescent substance comprises an α-sialon crystal structure having the same crystal structure with an α-type silicon nitride crystal, which includes at least an M(0) element (where M(0) represents one or two elements selected from Sr and La), an M(1) element (where M(1) represents one or more elements selected from Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb), Si, Al, and nitrogen.
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