Emissive ceramic materials having a dopant concentration gradient and methods of making and using the same
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United States of America Patent
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Aug 11, 2015
Grant Date -
Nov 13, 2014
app pub date -
Jul 29, 2014
filing date -
Dec 1, 2010
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Abstract
Disclosed herein are emissive ceramic materials having a dopant concentration gradient along a thickness of a yttrium aluminum garnet (YAG) region. The dopant concentration gradient may include a maximum dopant concentration, a half-maximum dopant concentration, and a slope at or near the half-maximum dopant concentration. The emissive ceramics may, in some embodiments, exhibit high internal quantum efficiencies (IQE). The emissive ceramics may, in some embodiments, include porous regions. Also disclosed herein are methods of make the emissive ceramic by sintering an assembly having doped and non-doped layers.
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