Organic electroluminescent component

US5756224A · kind A · utility

Assignee

• U.S. Philips Corporation · US

Inventors

• Herbert Friedrich Borner · Hamburg, DE
• Ulrich Kynast · Roetgen, DE
• Wolfgang Busselt · Roetgen, DE
• Markus Haase · Aachen, DE

Key dates

• Filing date: Aug 10, 1995
• Grant date: May 26, 1998
• Expiry date: Aug 10, 2015

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/917

Abstract

An organic electroluminescent component with a layer structure comprising PA1 a) a substrate layer, PA1 b) a first transparent electrode layer, PA1 c) one or several functional optoelectronic layer(s) with PA2 c1) possibly, one or several p-type organic materials with one or several singlet states and one or several triplet states, and PA2 c2) a luminescent material with one or several organometallic complexes of a rare earth metal ion with organic ligands, in which the rare earth metal ion has an emitting state and the organic ligands have one or several singlet states and one or several triplet states, and PA2 c3) one or several n-type organic materials with one or several singlet states and one or several triplet states, and PA1 d) a second electrode, wherein the triplet state of lowest energy of the ligands is lower than the triplet states of lowest energy of the n-type and/or the p-type organic materials but higher than above the emitting state of the rare earth metal ion excels through a surprisingly increased luminous efficacy, and in addition has a very good thermal stability while it can be manufactured in a simple process.