An organic light-emitting device comprising a light-emissive organic layer interposed between first and second electrodes for injecting charge carriers into the light-emissive organic layer, at least one of said first and second electrodes comprising a plurality of layers including a first electrode layer having a high resistance adjacent the surface of the light-emissive organic layer remote from the other of the first and second electrodes, said first electrode layer comprising a high-resistance material selected from the group consisting of a mixture of a semiconductor material with an insulator material, a mixture of a semiconductor material with a conductor material and a mixture of an insulator material with a conductor material.
This application is a continuation of and claims priority to U.S. Ser. No. 09/868,351, filed Oct. 2, 2001 now U.S. Pat. No. 7,005,196, which is a 371 of PCT/GB99/04150, filed Dec. 15, 1999 and which claims priority to Great Britain Application No. 9907120.1, filed Mar. 26, 1999; and Great Britain Application No. 9827699.1, filed Dec. 16, 1998, all of which are hereby incorporated by reference in their entirety.
Priority Data
Dec 16, 1998 [GB] 9827699.1 Mar 26, 1999 [GB] 9907120.1
