Patent ID: 7868537
Filing Date: 2011-01-11
Classification: B82Y,H01L

Abstract:
1. A light-emitting diode comprising: a first electrode; a second electrode; a light-emitting layer being positioned between the first electrode and the second electrode; a receptor layer of an ion receptor having affinity for ions of a first charge, the receptor layer being positioned between the first electrode and the light-emitting layer; a further layer of monolayer molecules including immobile ions of a second charge, the second charge being opposite to said first charge, wherein the further layer is between the second electrode and the light-emitting layer such that the immobile ions are positioned between the first electrode and the second electrode at a distance from the receptor layer in the direction of the second electrode, wherein the further layer includes counterions having said first charge, the counterions being bound to the immobile ions, wherein the counterions are configured to move towards the receptor layer upon application of a voltage between the first electrode and the second electrode, and the receptor layer is configured to capture and immobilize the counterions thereby forming a concentration of immobilized ions of the first charge at the first electrode to form an ion gradient for injection of electrons and holes into the light-emitting layer when a further voltage is applied between the first electrode and the second electrode.