University of Durham

University of Exeter

Ifor David William Samuel

Andrew Paul Monkman

William Leslie Barnes

Benjamin James Matterson

Stuart Dailey

John Mark Lupton

Martin Guy Salt

Eymard Gabriel Francois Joseph Rebourt

An LED, and in particular an LED employing emissive semi-conductors such as conjugated polymeric materials, consists of a pair of electrodes, one or more intermediate semi-conductor layers arranged therebetween and optionally one or more futher layers, and incorporates a microstructured feature adapted to manipulate spontaneous emission or propagation of light. The invention also consists of a method for the production of such an LED and the use of such a LED as an light emitting display.

Light emitting diode with improved efficiency

Device adapted for efficient light emission including a plurality of component layers of which a first outer layer is adapted for electron injection, a second opposing outer layer is adapted for hole injection, and plural intermediate layers arranged therebetween for charge semi-conduction. The intermediate layers include at least one semi-conducting polymer adapted for hole transport and/or electron blocking, and at least one semi-conducting polymer adapted for hole blocking and/or election transport. The at least one semi-conducting polymer adapted for electron transport and/or hole blocking comprises polymer selected from a nitrogen and/or sulphur containing polymer which is partially or substantially conjugated.

Polymer light emitting diode

Growing community of inventors

Durham, United Kingdom

Ifor David William Samuel