Luminescent body and optical device including the same

US7382033B2 · kind B2 · utility

Assignees

• TOYODA GOSEI CO., LTD. · JP
• Gundula ROTH · DE
• Walter TEWS · DE

Inventors

• Gundula Roth · Levenhagen, DE
• Walter Tews · Greifswald, DE

Key dates

• Filing date: Dec 19, 2003
• Grant date: Jun 3, 2008
• Expiry date: Sep 19, 2024

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02B20/00
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A luminous body of prolonged fluorescence lifetime characterized by comprising not only an activator but also at least one coactivator selected from the group consisting of La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Bi, Sn, Sb and analogues thereof as a further luminescent center for enhancing the thermostability of luminous body. This luminous body excels in thermostability and fluorescence lifetime, so that it is useful as a luminous body for LED.