RED PHOSPHOR COMPOSITION AND METHOD OF PREPARING THE SAME
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United States of America Patent
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Issued Date -
Oct 30, 2008
app pub date -
Dec 27, 2007
filing date -
Apr 25, 2007
priority date (Note) -
Abandoned
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Abstract
The invention relates to a red phosphor composition and a method of preparing the same, and more particularly, a red phosphor which includes Al.sub.2O.sub.3 as a main component and contains Cr.sub.2O.sub.3, Cr.sub.3O.sub.4, or CrO as a primary active agent and at least one element selected from Eu, Pr, Fe, Ce, and Sm as a secondary active agent. The red phosphor has an emission wavelength band of 650-750 nm and can provide high chromatic purity for red light and high light emission efficiency.
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