Luminous substance for a light source and light source associates therewith

US6669866B1 · kind B1 · utility

Assignees

• Patent-Treuhand-Gesellschaft fur elektrische Gluhlampen mbH · DE
• OSRAM Opto Semiconductors GmbH · DE

Inventors

• Franz Kummer · Munich, DE
• Franz Zwaschka · Ismaning, DE
• Andries Ellens · Munich, DE
• Alexandra Debray · Regensburg, DE
• Guenther Waitl · Regensburg, DE

Key dates

• Filing date: Mar 15, 2001
• Grant date: Dec 30, 2003
• Expiry date: Feb 9, 2022

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/8513
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A phosphor for light sources, the emission from which lies in the short-wave optical spectral region, as a garnet structure A3B5O12. It is activated with Ce, the second component B representing at least one of the elements Al and Ga, and the first component A is terbium or terbium together with at least one of the elements Y, Gd, La and/or Lu.In a preferred embodiment, a phosphor having a garnet of structure (Tb1&#8722;x&#8722;yRExCey)3(Al,Ga)5O12,whereRE=Y, Gd, La and/or Lu;0&lE;x&lE;0.5&#8722;y;0<y<0.1 is used.