Electroluminescent devices

US6897473B1 · kind B1 · utility

Assignee

• Cambridge Display Technology Limited · GB

Inventors

• Jeremy Burroughes · Cambridge, GB
• Richard Henry Friend · Cambridge, GB
• Christopher John Bright · Cambridge, GB
• David Lacey · Hope, GB
• Peter Devine · Westfield, GB

Key dates

• Filing date: Mar 12, 1999
• Grant date: May 24, 2005
• Expiry date: Mar 12, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2101/90

Abstract

An electroluminescent device comprising: a first charge carrier injecting layer for injecting positive charge carriers; a second charge carrier injecting layer for injecting negative charge carriers; and a light-emissive layer located between the charge carrier injecting layers and comprising a mixture of: a first component for accepting positive charge carriers from the first charge carrier injecting layer; a second component for accepting negative charge carriers from the second charge carrier injecting layer; and a third, organic light-emissive component for generating light as a result of combination of charge carriers from the first and second components; at least one of the first, second and third components forming a type II semiconductor interface with another of the first, second and third components.