Conductive polymer material and substrate

A conductive polymer material comprising:

• (A) a π-conjugated polymer;
• (B) a dopant polymer which contains a repeating unit having a sulfo group and has a weight-average molecular weight in the range of 1,000 to 500,000;
• and
• (C) either or both of sulfonium salt compounds represented by the following general formulae (1-1) and (1-2),
• wherein R1, R2, and R3 independently represent a halogen atom, an amino group that contains an alkyl group having 1 to 4 carbon atoms, a linear, branched, or cyclic alkyl group, alkenyl group, oxoalkyl group, or oxoalkenyl group having 1 to 12 carbon atoms, an aryl group having 6 to 20 carbon atoms, an aralkyl group or aryloxoalkyl group having 7 to 12 carbon atoms, in which these groups may contain an alkoxy group, a hydroxyl group, a carboxyl group, a nitro group, a cyano group, an amino group, a halogen atom, an ester group, an ether group, or a thioether group;
• R1 and R2 may form a ring together with each other, and when the ring is formed, R1 and R2 represent an alkylene group having 1 to 6 carbon atoms;
• R4, R5, and R6 independently represent an alkyl group having 1 to 4 carbon atoms;
• K− represents a hydroxide ion, a chloride ion, a bromide ion, a carbonate ion, a hydrogen carbonate ion, a nitrate ion, a carboxylate ion, a sulfonate ion, or a sulfinate ion;
• and when K− is a carboxylate ion, K− may be substituted for any of R1, R2, and R3 to form an inner salt.