Light-emitting device comprising an EU(II)-activated phosphor

US7061024B2 · kind B2 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Peter Josef Schmidt · Aachen, DE
• Thomas Justel · Witten, DE
• Walter Mayr · Alsdorf, DE
• Hans-Dieter Bausen · Aachen, DE
• Wolfgang Schnick · Gauting, DE
• Henning Hoppe · Brandenburg an der Havel, DE

Key dates

• Filing date: Oct 7, 2003
• Grant date: Jun 13, 2006
• Expiry date: Oct 7, 2023

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/8512
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention concerns a light emitting device comprising a light emitting structure capable of emitting primary light of a wavelength less then 480 nm and a luminescent screen comprising a phosphor of general formula (Sr1-a-bCabBacMgdZne)SixNyOz:Eua, wherein 0.002≦a≦0.2, 0.0≦b≦0.25, 0.0≦c≦0.25, 0.0≦d≦0.25, 0.0≦e≦0.25, 1.5≦x≦2.5, 1.5≦y≦2.5 and 1.5≦z≦2.5. The invention also concerns a luminescent screen comprising a phosphor of general formula (Sr1-a-bCabBacMgdZne)SixNyOz:Eua, wherein 0.002≦a≦0.2, 0.0≦b≦0.25, 0.0≦c≦0.25, 0.0≦d≦0.25, 0.0≦e≦0.25, 1.5≦x≦2.5, 1.5≦y≦2.5 and 1.5≦z≦2.5. The invention also concerns a phosphor of general formula (Sr1-a-bCabBacMgdZne)SixNyOz:Eua, wherein 0.002≦a≦0.2, 0.0≦b≦0.25, 0.0≦c≦0.25, 0.0≦d≦0.25, 0.0≦e≦0.25, 1.5≦x≦2.5, 1.5≦y≦2.5 and 1.5 <z<2.5.