Patent ID: 7550915

Claim:
An OLED device, comprising: a substrate; an anode on said substrate; an interlayer on said anode; an emissive layer on said interlayer, wherein said emissive layer includes a plurality of first components that are responsible for hole injection and transport; and a cathode on said emissive layer, wherein said interlayer includes a hole transport material having a plurality of second components and a plurality of third components, wherein a particular one of said plurality of second components is the same said plurality of first components that are responsible for hole injection and transport in the emissive layer, wherein said plurality of second components of the interlayer are polymerized with a particular one of said plurality of third components, wherein said interlayer has a range of IPs between a highest IP of an adjacent layer on an anode-end and a lowest IP of an adjacent layer on an “emissive layer”-end, and wherein said interlayer is formed directly on said anode.