Hole-transporting material

Claim 1

A hole-transporting material of the formula (1), H-A-[-B-A-] n -B-A-H   (1) wherein A is an aromatic amine derivative residue of the following formula (2), B is a residue of the following formula (3), and n is from 1 to 5,000, Formula (2): wherein each of R¹ to R¹⁰ is independently hydrogen, halogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, an unsubstituted thioalkoxy group, a cyano group, an amino group, a mono- or disubstituted amino group, a hydroxyl group, a mercapto group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted aromatic group or a substituted or unsubstituted heterocyclic group, and adjacent substituents among R¹ to R¹⁰ may form a substituted or unsubstituted ring or rings, X is a divalent aromatic residue or -Ar-Z-Ar- in which each Ar is an aromatic residue having 6 to 20 carbon atoms and Z is a direct bond, oxygen, sulfur, selenium, an aromatic residue which may contain any one of oxygen, sulfur and selenium, or a divalent aliphatic residue which may contain any one of oxygen, sulfur and selenium, and m is 0 or 1, Formula (3): wherein each of R¹¹ to R¹⁴ is independently hydrogen, halogen, a substituted or unsubstituted alkyl group, a substituted or unsubstituted alkoxy group, or a disubstituted amino group, and adjacent substituents among R¹¹ to R¹⁴ may form a substituted or unsubstituted ring, Y is oxygen, sulfur or monosubstituted nitrogen, j is 0 or 1 and k is from 4 to 7.

Claim 7

A device according to claims 5 or 6, wherein at least one of the light-emitting layer, a hole-injecting layer and the electron-injecting layer contains the hole-transporting material according to any of claims 1 to 4.