Polymer compound and organic semiconductor device using the same

A compound represented by the formula (6):

• wherein
• a ring A and a ring B each independently represent a heterocyclic ring, and the heterocyclic ring optionally has a substituent other than R7 and R8;
• X3 represents an oxygen atom, a sulfur atom or a selenium atom;
• Z1 and Z2 each independently represent a group represented by the formula (Z-1), a group represented by the formula (Z-2), a group represented by the formula (Z-3), a group represented by the formula (Z-4), a group represented by the formula (Z-5), a group represented by the formula (Z-6) or a group represented by the formula (Z-7);
• R1 and R2 each independently represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an alkylthio group, a cycloalkylthio group, an aryl group, a monovalent heterocyclic group, a halogen atom, a silyl group, an amino group, an alkenyl group, a cycloalkenyl group, an alkynyl group, a hydroxyl group, a nitro group, a cyano group, a carboxyl group, an alkylcarbonyl group, a cycloalkylcarbonyl group, an alkoxycarbonyl group or a cycloalkoxycarbonyl group, and of these groups, an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an alkylthio group, a cycloalkylthio group, an aryl group, a monovalent heterocyclic group, a silyl group, an amino group, an alkenyl group, a cycloalkenyl group, an alkynyl group, an alkylcarbonyl group, a cycloalkylcarbonyl group, an alkoxycarbonyl group and a cycloalkoxycarbonyl group each optionally have a substituent;
• R7 and R8 each independently represent a hydrogen atom, a halogen atom, a silyl group, a hydroxyl group, a carboxyl group, a borate residue, a boric acid residue or an organotin residue, and of these groups, a silyl group optionally has a substituent;
• wherein
• R represents an alkyl group, a cycloalkyl group, an alkoxy group, a cycloalkoxy group, an alkylthio group, a cycloalkylthio group, an aryl group or a monovalent heterocyclic group, and these groups optionally have a substituent;
• and when a plurality of R are present, they may be the same or different.