OLED display with extended lifetime

US8241764B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Christian Schildknecht · Schifferstadt, DE
• Evelyn Fuchs · Mannheim, DE
• Nicolle Langer · Heppenheim, DE
• Klaus Kahle · Ludwigshafen, DE
• Christian Lennartz · Dublin, IE
• Oliver Molt · Hirschberg, DE
• Gerhard Wagenblast · Wachenheim, DE
• Jens Rudolph · Abu Dhabi, AE

Key dates

• Filing date: Sep 13, 2007
• Grant date: Aug 14, 2012
• Expiry date: May 3, 2029

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/10
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to an organic light-emitting diode which has a light-emitting layer C which comprises at least one hole-conducting material CA and at least one phosphorescence emitter CB, to mixtures comprising at least one carbene complex in combination with at least one hole-conducting material or in combination with at least one phosphorescence emitter, and to the use of mixtures comprising at least one hole-conducting material and at least one phosphorescence emitter as a light-emitting layer in OLEDs for prolonging the lifetime of the light-emitting layer. The inventive organic light-emitting diode may have, in at least one of the layers of the organic light emitting diode, preferably in the hole-blocking layer and/or the electron-blocking layer and/or the light-emitting layer C, in addition to the hole-conducting material CA and the emitter CB, at least one compound selected from disilylcarbazoles, disilyldibenzofurans, disilyldibenzothiophenes, disilyldibenzophospholes, disilyldibenzothiophene S-oxides and disilyldibenzothiophene S,S-dioxides.