Carbonitride and carbidonitride phosphors and lighting devices using the same

US8801969B2 · kind B2 · utility

Assignee

• Lightscape Materials, Inc. · US

Inventors

• Alan C. Thomas · Gilbert, US
• Yuanqiang Li · Plainsboro, US
• Yongchi Tian · Princeton Junction, US

Key dates

• Filing date: Jan 13, 2012
• Grant date: Aug 12, 2014
• Expiry date: Apr 12, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2224/8592
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed herein is a novel group of carbonitride and carbidonitride phosphors and light emitting devices which utilize these phosphors. In certain embodiments, the inventive phosphors are expressed as follows:Cam/2Si12-(m+n)−xCxAlm+nN16-nOnEu2+  (1)M(II)m/2Si12-(m+n)−xCxM(III)m+nN16-nOn-y/2Hy:A  (2)Mm/vSi12-(m+n)−xCxM(III)m+nN16-nOn-y/2Hy:A  (3)Cam/2Si12-(m+n)+xAlm+n−xN16-n−xCxOn:Eu2+  (4)M(II)m/2Si12-(m+n)+xM(III)m+n−xN16-n−xCxOn-y/2Hy:A  (5)Mm/vSi12-(m+n)+xM(III)m+n−xN16-n−xCxOn-y/2Hy:A  (6)wherein v is the valence number of M, 0≦m<5, 0≦n≦3, 0≦x<4, and 0≦y<1, M is at least one cation, M(II) is at least one divalent cation, M(III) is at least one trivalent cation, H is at least one monovalent anion, and A is a luminescence activator.