The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2016
Filed:
Dec. 14, 2012
Yellow phosphor having an increased activator concentration and a method of making a yellow phosphor
Cree, Inc., Durham, NC (US);
Iliya S. Todorov, Durham, NC (US);
Brian T. Collins, Holly Springs, NC (US);
Cree, Inc., Durham, NC (US);
Abstract
A yellow phosphor having an increased activator concentration includes a host lattice comprising yttrium aluminum garnet (YAG) and an activator comprising cerium in the host lattice, where the cerium is present at a concentration of at least about 5 wt. % Ce. A method of making a yellow phosphor includes forming a reaction mixture comprising: a first precursor comprising cerium and oxygen; a second precursor comprising cerium and fluorine; a third precursor comprising yttrium; and a fourth precursor comprising aluminum. The reaction mixture is heated in a reducing environment at a temperature sufficient to form a yellow phosphor including a host lattice comprising yttrium aluminum garnet and an activator comprising cerium (Ce) incorporated in the host lattice.