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:
Apr. 05, 2022
Filed:
Jun. 02, 2020
Osram Opto Semiconductors Gmbh, Regensburg, DE;
Osram Gmbh, Munich, DE;
Tim Fiedler, Landsberg am Lech, DE;
Daniel Bichler, Augsburg, DE;
Stefan Lange, Augsburg, DE;
Rebecca Römer, Regensburg, DE;
Frank Jermann, Koenigsbrunn, DE;
Frauke Thienel, Munich, DE;
Barbara Huckenbeck, Augsburg, DE;
Alexander Baumgartner, Donaustauf, DE;
Vera Stöppelkamp, Augsburg, DE;
Norbert Bönisch, Koenigsbrunn, DE;
Hailing Cui, Regensburg, DE;
OSRAM OPTO SEMICONDUCTORS GMBH, Regensburg, DE;
OSRAM GMBH, Munich, DE;
Abstract
A phosphor and a method for making the phosphor are disclosed. In an embodiment a phosphor for emission of red light includes Sr(SrCa)SiAlN:Eu, wherein x is 0.8<x≤1, wherein between 0.1% and 5% inclusive of the Sr, Ca and/or Sr/Ca lattice sites are replaced by Eu, wherein the parameter value a is between 0.6 and 1.0 inclusive, wherein the phosphor has a structure comprising (Si/Al)Ntetrahedra arranged in a 3D network, in which layers in an a-c plane are linked in a b-direction, and wherein pure Sr positions and positions having a mixed Sr/Ca population are intercalated between the network, layer by layer.