Patent ID: 7517595
Filing Date: 2009-04-14
Classification: C09K,H01L,H05B,Y10S

Abstract:
1. An OLED device comprising a cathode, an anode, a light emitting layer, and on the cathode side of said emitting layer, a further layer, wherein the further layer is an electron-transporting layer containing a mixture of: a) a first compound that has the lowest LUMO value of the compounds in the layer, the amount being greater than 40% by volume and less than 100% by volume of the layer wherein the first compound is represented by formula V: wherein: R b) at least one second compound that is a low voltage electron transport material, exhibiting a higher LUMO value than the first compound, the total amount of said compound(s) being less than or equal to 60% by volume and more than 0% by volume of the layer wherein the second compound is represented by Formula I: wherein M represents Al; n is 3; and Z independently in each occurrence represents the atoms completing a quinoline group.