Phosphor having reduced afterglow

US5562860A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Christa Grabmaier · Starnberg, DE
• Hermann Boedinger · Munich, DE
• Juergen Leppert · Forchheim, DE

Key dates

• Filing date: Jul 12, 1995
• Grant date: Oct 8, 1996
• Expiry date: Jul 12, 2015

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/7771
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A phosphor for a radiation detector is based on a phosphor ceramic of a rare earth oxisulfide with the general sum formula (M.sub.1-x Ln.sub.x).sub.2 O.sub.2 S, wherein M is at least one element from the group Y, La and Gd, Ln is at least one element of the group Eu, Pr, Tb, Yb, Dy, Sm and Ho, and wherein (2.times.10.sup.-1).gtoreq..times..gtoreq.(1.times.10.sup.-6) and which is doped an element D selected from Zr, Ti and Hf and at least one element A selected from Co, Mn and Ni for reducing the afterglow.