Zinc silicate luminescent materials and related luminescent screen products

US6469434B1 · kind B1 · utility

Assignee

• KONINKLIJKE PHILIPS ELECTRONICS NV · NL

Inventors

• Helmut Bechtel · Aachen, DE
• Thomas Justel · Witten, DE
• Walter Mayr · Alsdorf, DE
• Hans Nikol · Aachen, DE
• Cornelis Reinder Ronda · Aachen, DE

Key dates

• Filing date: Nov 10, 1999
• Grant date: Oct 22, 2002
• Expiry date: Nov 10, 2019

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/77742
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Willemite (Zn2SiO4:Mn) is doped with one or more ions selected from the group formed by Gd3+, Eu2+, Co2+, Ce3+, Pr3+, Nd3+, Sm3+, Tb3+, Dy3+, Ho3+, Er3+, Tm3+ and Yb3+. This results in a increase in absorption and quantum yield and a decrease of the decay time.