Carbazole polymer

A carbazole polymer characterized by comprising recurring units of formula (1)

• in formula (1), R1 to R4 are each independently an alkyl group of 1 to 60 carbons, a haloalkyl group of 1 to 60 carbons, a cycloalkyl group of 3 to 60 carbons, a bicycloalkyl group of 4 to 60 carbons, an alkenyl group of 2 to 60 carbons, an alkynyl group of 2 to 60 carbons, an aromatic group of 6 to 60 carbons or a heteroaromatic group of 2 to 60 carbons which alkyl, haloalkyl, cycloalkyl, bicycloalkyl, alkenyl, alkynyl, aromatic and heteroaromatic groups may be substituted with Z;
• Cz is a divalent group that includes the carbazole skeleton of formula (2)
• in formula (2), R5 being a hydrogen atom, an alkyl group of 1 to 60 carbons, a haloalkyl group of 1 to 60 carbons, a cycloalkyl group of 3 to 60 carbons, a bicycloalkyl group of 4 to 60 carbons, an alkenyl group of 2 to 60 carbons, an alkynyl group of 2 to 60 carbons, an aromatic group of 5 to 59 carbons or a heteroaromatic group of 2 to 60 carbons which alkyl, haloalkyl, cycloalkyl, bicycloalkyl, alkenyl, alkynyl, aromatic and heteroaromatic groups may be substituted with Z, and which alkyl groups and haloalkyl groups may include an ether structure,
• R6 to R11 being each independently a hydrogen atom, a halogen atom, a nitro group, a cyano group, an amino group, a hydroxyl group, a thiol group, a phosphate group, a sulfonic acid group, a carboxyl group, an alkoxy group of 1 to 60 carbons, a thioalkoxy group of 1 to 60 carbons, an alkyl group of 1 to 60 carbons, a haloalkyl group of 1 to 60 carbons, a cycloalkyl group of 3 to 60 carbons, a bicycloalkyl group of 4 to 60 carbons, an alkenyl group of 2 to 60 carbons, an alkynyl group of 2 to 60 carbons, an acyl group of 1 to 60 carbons, an aromatic group of 6 to 60 carbons or a heteroaromatic group of 2 to 60 carbons which alkoxy, thioalkoxy, alkyl, haloalkyl, cycloalkyl, bicycloalkyl, alkenyl, alkynyl, acyl, aromatic and heteroaromatic groups may be substituted with Z, and
• m being an integer from 1 to 10;
• Ar is a divalent aromatic ring or heteroaromatic ring which aromatic and heteroaromatic rings may be substituted with Z;
• and
• Z is a halogen atom, a nitro group, a cyano group, an amino group, a hydroxyl group, a thiol group, a phosphate group, a sulfonic acid group, a carboxyl group, an alkoxy group of 1 to 60 carbons, a thioalkoxy group of 1 to 60 carbons, an alkyl group of 1 to 60 carbons, a haloalkyl group of 1 to 60 carbons, a cycloalkyl group of 3 to 60 carbons, a bicycloalkyl group of 4 to 60 carbons, an alkenyl group of 2 to 60 carbons, an alkynyl group of 2 to 60 carbons, an acyl group of 1 to 60 carbons, an aromatic group of 6 to 60 carbons or a heteroaromatic group of 2 to 60 carbons.