Patent ID: 8372526
Filing Date: 2013-02-12
Classification: C09K,H01L,H05B

Abstract:
1. A device, comprising: an anode; a cathode; an intermediate connector disposed between the anode and the cathode, the intermediate connector comprising: a first metal having a work function lower than 4.0 eV; and a second metal having a work function lower than 5.0 eV; wherein the work function of the first metal is at least 0.5 eV less than the work function of the second metal; a first layer consisting essentially of the first metal, the first layer being in direct contact with the first sublayer of the second organic layer; and a second layer consisting essentially of the second metal, the second layer being in direct contact with the first layer, and disposed closer to the anode than the first layer; a first organic layer disposed between the anode and the intermediate connector, the first organic layer further comprising a first organic emissive material; a second organic layer disposed between the intermediate connector and the cathode, the second organic layer comprising a plurality of sublayers, including a first sublayer of the second organic layer and a second sublayer of the second organic layer; the first sublayer of the second organic layer being in direct contact with the intermediate connector, and comprising a material having the structure: wherein R R and R′ are independently selected from substituted or unsubstituted C substituted C aryl groups includes phenyl, biphenyl, terphenyl, naphthyl, anthracenyl, tetracenyl, pentacenyl, perylenyl and coronenyl, which are singly or multiply substituted or unsubstituted; and the second sublayer of the second organic layer comprising a second organic emissive material; wherein the first layer is in direct contact with the first sublayer of the second organic layer.