Optoelectronic device
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United States of America Patent
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Issued Date -
Nov 29, 2007
app pub date -
May 25, 2006
filing date -
May 25, 2006
priority date (Note) -
Abandoned
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Abstract
The present invention provides an optoelectronic device comprising a light source, an encapsulant with Refractive Index n.sub.1, and a phosphor with Refractive Index n.sub.2 which is within the range of from about 0.85n.sub.1, to about 1.15n.sub.1. The present invention also provides a method of adjusting the Refractive Index n.sub.x of a phosphor which is higher than a predetermined value n.sub.2. The method comprises partially or completely replacing one or more first element(s) in the phosphor with one or more second elements which typically have lower atomic weight than the first element(s). The phosphor is chemically stable and optically comparable with the encapsulant; and the optoelectronic device has gained technical merits such as increased light output efficiency, easy manufacturability, and cost-effectiveness, among others.
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