White light emitting OLEDs from combined monomer and aggregate emission

US6869695B2 · kind B2 · utility

Assignees

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

Inventors

• Mark E. Thompson · Villa Park, US
• Jason Brooks · Philadelphia, US
• Vadim Adamovich · Yardley, US
• Stephen R. Forrest · Ann Arbor, US
• Brian D'Andrade · Willingboro, US

Key dates

• Filing date: Mar 29, 2002
• Grant date: Mar 22, 2005
• Expiry date: Jun 12, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24942

Abstract

The present invention relates to efficient organic light emitting devices (OLEDs). More specifically, the present invention relates to white-emitting OLEDs, or WOLEDs. The devices of the present invention employ two emitters in a single emissive region to sufficiently cover the visible spectrum. White emission is achieved from two emitters in a single emissive region through the formation of an aggregate by one of the emissive centers. This allows the construction of simple, bright and efficient WOLEDs that exhibit a high color rendering index.