Organic layer composition, organic layer, and method of forming patterns

An organic layer composition, comprising

• an aromatic ring compound,
• an additive including perfluoroalkyl in the structure, and
• a solvent,
• wherein a fluoro (F) group included in the additive is included in an amount of greater than 0 wt % and less than or equal to 30 wt % based on a total weight, 100 wt % of the additive, and
• a surface tension decrease rate of the additive measured according to Condition 1 is 0.1% to 30%:
• [Condition 1]
• S1:
• a solution including the additive mixed with cyclohexanone is prepared wherein, an amount of the additive is 2 wt % based on 100 wt % of the solution,
• S2:
• a surface tension of the solution is measured at 25° C., and
• S3:
• a surface tension decrease rate of the additive is calculated according to Equation 1,
• Surface tension decrease rate (%) of an additive=((1−(surface tension of an additive measured at 25° C.))/(surface tension of cyclohexanone measured at 25° C.))×100. Equation 1