Opto-electrical devices

US6707248B1 · kind B1 · utility

Assignee

• Cambridge Display Technology Limited · GB

Inventors

• Jeremy Burroughes · Cambridge, GB
• Julian Carter · Chesterton, GB
• Alec Gunner · St Ives, GB
• Stephen Karl Heeks · Cambridge, GB

Key dates

• Filing date: Dec 19, 2001
• Grant date: Mar 16, 2004
• Expiry date: Dec 19, 2021

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K2102/3031

Abstract

An opto-electrical device comprising an anode electrode, a cathode electrode, and an opto-electrically active region located between the electrodes, the cathode electrode including a first layer comprising a compound of a group 1, group 2 or transition metal, a second layer comprising a material having a work function below 3.5 eV, and a third layer spaced from the opto-electrically active region by the first and second layers and having a work function above 3.5 eV.