Color-tunable organic light emitting devices

US6210814A · kind A · utility

Assignees

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

Inventors

• Mark E. Thompson · Villa Park, US
• Vladimir Bulovic · Lexington, US
• Stephen R. Forrest · Ann Arbor, US
• Andrei Shoustikov · Los Angeles, US

Key dates

• Filing date: Sep 14, 1998
• Grant date: Apr 3, 2001
• Expiry date: Sep 14, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S428/917
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An emissive layer in an organic light emitting device comprising a heterostructure comprises a host material, an emissive molecule, present as a dopant in said host material, adapted to luminesce when a voltage is applied across the heterostructure; and a polarization molecule, present as a dopant in said host material and having a dipole moment, that affects the wavelength of light emitted when said emissive dopant molecule luminesces, wherein said polarization molecule is selected from the group consisting of N,N-dimethylparanitroaniline, certain polyphenyls, certain stilbenes, certain fluorenes, and certain diphenylacetylenes, and a method for making same.