Patent ID: 7227027

Claim:
A carbazole derivative represented by formula (III): wherein Y is selected from two 6–50 carbon aromatic groups linked by a unit consisting of two 1–3 carbon alkyl groups linked by a 6–50 carbon aromatic group, alkyl groups linked to spiro groups, alkyl groups and aromatic groups linked to spiro groups, a group consisting of two 1–3 carbon alkyl groups linked by a unit of one or both of a fluorene moiety and a spiro moiety, and a group consisting of two 1–3 carbon alkyl groups linked by a nonplanar substituted or unsubstituted 6–50 carbon unit of one or both of a fluorene moiety and a spiro moiety, a group consisting of two 1–3 carbon alkyl groups linked by a unit consisting of two 6–50 carbon aromatic groups linked by an alkenyl group, and wherein R 1 to R 16 are independently selected from the group consisting of H, alkyl groups, alkoxy groups, aromatic groups, fluoroalkyl groups, halogens, and cyano.