Polymers, use thereof as hole transport material, and organic electronic devices comprising same

A polymer comprising a repeating unit represented by Formula (1) in 40 mol % to 100 mol % of a total repeating unit forming the polymer:

• wherein, in Formula (1),
• * represents a bonding site with a neighboring repeating unit or an end group in the polymer;
• R1, R3, R4, R5, R6 and R8 each independently represent a group selected from the group consisting of a hydrogen atom, a deuterium atom, a fluorine atom, a CN group, an NRaRb group, a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming atoms, and a substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming atoms, wherein Ra and Rb each independently represent a group selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming atoms, and a substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming atoms;
• at least one of R4 and R5 is an aromatic amino group represented by the following Formula (A) or (B),
• in Formulae (A) and (B),
• Ar1 represents a substituted or unsubstituted arylene group having 6 to 30 ring-forming atoms, or a substituted or unsubstituted heteroarylene group having 5 to 30 ring-forming atoms;
• Ar2 and Ar3 each independently represent a substituted or unsubstituted aryl group having 6 to 30 ring-forming atoms, or a substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming atoms;
• and
• R9 and R10 each independently represent a group selected from the group consisting of an alkyl group having 1 to 30 carbon atoms, an aryl group having 6 to 30 ring-forming atoms, and a heteroaryl group having 5 to 30 ring-forming atoms;
• or R9 and R10, together with the carbon atoms in Formula (1) to which they bond, form a cycloalkyl ring having 3 to 10 ring-forming atoms, or a spirofluorene ring, wherein the alkyl group, the aryl group, the heteroaryl group, the cycloalkyl ring, and the spirofluorene ring are each optionally substituted with an alkyl group having 1 to 30 carbon atoms, or an aryl group having 6 to 30 ring-forming atoms unsubstituted or substituted with an alkyl group having 1 to 30 carbon atoms.