Intersystem crossing agents for efficient utilization of excitons in organic light emitting devices

US6310360A · kind A · utility

Assignees

• THE TRUSTEES OF PRINCETON UNIVERSITY · US
• University of Southern California · US

Inventors

• Stephen R. Forrest · Ann Arbor, US
• Mark E. Thompson · Villa Park, US
• Marc A. Baldo · Princeton, US

Key dates

• Filing date: Jul 21, 1999
• Grant date: Oct 30, 2001
• Expiry date: Jul 21, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/103

Abstract

Organic light emitting devices are described wherein the emissive layer comprises a host material containing a fluorescent or phosphorescent emissive molecule, which molecule is adapted to luminesce when a voltage is applied across the heterostructure, wherein an intersystem crossing molecule of optical absorption spectrum matched to the emission spectrum of the emissive molecule enhances emission efficiency.