Organic electroluminescent device emitting blue light

US10804481B2 · kind B2 · utility

Assignee

• CYNORA GmbH · DE

Inventors

• Andreas Haldi · Dresden, DE
• Georgios Liaptsis · Mannheim, DE
• Harald FLUEGGE · Karlsruhe, DE
• Patrick Pingel · Potsdam, DE
• Stefan Hoefle · Karlsruhe, DE

Key dates

• Filing date: May 4, 2018
• Grant date: Oct 13, 2020
• Expiry date: Jan 10, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/40
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a an organic electroluminescent device comprising a light-emitting layer B comprising a host material HB, a first thermally activated delayed fluorescence (TADF) material EB, and a second TADF material SB, wherein SB transfers energy to EB and EB emits TADF with an emission maximum between 420 and 500 nm.