Organic semiconductor element, manufacturing method thereof, compound, organic semiconductor composition, organic semiconductor film, and manufacturing method thereof

An organic semiconductor element comprising:

• an organic semiconductor layer containing a compound having a constitutional repeating unit represented by Formula 1 and having a molecular weight of 2,000 or greater,
• D-A (1)
• in Formula 1, A represents an electron acceptor unit including a partial structure having at least one of a sp2 nitrogen atom, a carbonyl group, or a thiocarbonyl group in a ring structure, D represents an electron donor unit including a divalent aromatic heterocyclic group having at least one of an N atom, an O atom, an S atom, or an Se atom in a ring structure, or a divalent aromatic hydrocarbon group consisting of a fused ring structure having two or more rings as a partial structure, and D and/or A has at least one monovalent group represented by Formula 1-1,
• *-L-O—R (1-1)
• in Formula 1-1, L represents a linear or branched alkylene group having m carbon atoms, R represents an alkyl group not having a substituent and having n carbon atoms, 6≦m+n≦50, and * represents a bonding site to another structure,
• wherein, in Formula 1, A has at least one structure selected from the group consisting of structures represented by Formulae A-1 to A-7 and A-9 to A-12, as a partial structure,
• wherein in Formulae A-1 to A-7 and A-9 to A-12, X's each independently represent an O atom, a S atom, a Se atom or NRA1, Y's each independently represent an O atom or a S atom, Za's each independently represent CRA2 or a N atom, W's each independently represent C(RA2)2, NRA1, a N atom, CRA2, an O atom, a S atom, or a Se atom, RA1's each independently represent an alkyl group, a monovalent group represented by Formula 1-1, or a bonding site to another structure, RA2's each independently represent a hydrogen atom, a halogen atom, an alkyl group, or a bonding site to another structure, and *'s each independently represent a bonding site to another structure.