Organic semiconductor element, manufacturing method thereof, composition for forming organic semiconductor film, and method of manufacturing organic semiconductor film

An organic semiconductor element comprising:

• a semiconductor active layer including a compound that is represented by Formula 1 and has a molecular weight of 3,000 or less,
• wherein, in Formula 1:
• X represents an oxygen atom, a sulfur atom, a selenium atom, or a tellurium atom,
• Y and Z each independently represent CR5, an oxygen atom, a sulfur atom, a selenium atom, a nitrogen atom, or NR6, two Y's may be identical to or different from each other, and two Z's may be identical to or different from each other,
• all rings including Y and Z are aromatic hetero rings,
• the aromatic hetero rings including R1 and R2 and Y and Z may be bonded to each other via the following group A of divalent linking groups,
• R3, R4, and a benzene ring may be bonded to each other via the following group A of divalent linking groups,
• the group A of divalent linking groups represents any one divalent linking group of —O—, —S—, —NR7—, —CO—, —SO—, and —SO2— or a divalent linking group obtained by bonding two or more of these divalent linking groups,
• m and n each independently represent an integer of 0 to 2,
• R1, R2, R5, R6, and R7 each independently represent a hydrogen atom, an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heteroaryl group,
• R3 and R4 each independently represent an alkyl group, an alkenyl group, an alkynyl group, an aryl group, or a heteroaryl group, in a case where there are two R3's, the two R3's may be identical to or different from each other, and in a case where there are two R4's, the two R4's may be identical to or different from each other,
• each Z is a nitrogen atom, when each Y is independently an oxygen atom, a sulfur atom, a selenium atom, or NR6, and
• each Z is an oxygen atom, a selenium atom, a nitrogen atom, or NR6, when each Y is —CH—.