Ink composition for organic solar cell and method for producing organic solar cell using same

An ink composition for an organic solar cell, comprising a non-halogen solvent;

• a copolymer represented by Chemical Formula 1 below;
• and an organic material:
• in Chemical Formula 1,
• a and b are each an integer of 1 to 3,
• two or more L1s are identical to or different from each other when a is 2 or more,
• two or more L2s are identical to or different from each other when b is 2 or more,
• L1 and L2 are identical to or different from each other and are each independently a conjugated structure,
• R1 and R2 are identical to or different from each other and are each independently, as a substituent substituted in the conjugated structure of L1 and L2, any one or more selected from the group consisting of hydrogen, deuterium, a halogen group, a nitrile group, a nitro group, an imide group, an amide group, a hydroxyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted alkylthioxy group, a substituted or unsubstituted arylthioxy group, a substituted or unsubstituted alkylsulfoxy group, a substituted or unsubstituted arylsulfoxy group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted silyl group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkylamine group, a substituted or unsubstituted aralkylamine group, a substituted or unsubstituted arylamine group, a substituted or unsubstituted heteroarylamine group, a substituted or unsubstituted aryl group, and a substituted or unsubstituted heterocyclic group containing at least one of N, O and S atoms,
• X1 and X2 are identical to or different from each other and are each independently CRR′, NR, O, SiRR′, PR, S, GeRR′, Se or Te,
• R, R′ and R3 to R5 are identical to or different from each other and are each independently hydrogen, deuterium, a halogen group, a nitrile group, a nitro group, an imide group, an amide group, a hydroxyl group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted cycloalkyl group, a substituted or unsubstituted alkoxy group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted alkylthioxy group, a substituted or unsubstituted arylthioxy group, a substituted or unsubstituted alkenyl group, a substituted or unsubstituted alkylsulfoxy group, a substituted or unsubstituted arylsulfoxy group, a substituted or unsubstituted silyl group, a substituted or unsubstituted boron group, a substituted or unsubstituted alkylamine group, a substituted or unsubstituted amine group, a substituted or unsubstituted arylamine group, a substituted or unsubstituted heteroarylamine group, a substituted or unsubstituted aryl group, or a substituted or unsubstituted heterocyclic group containing at least one of N, O and S atoms,
• X1′ is identical to or different from X1 and is independently as defined in X1, and
• R3′ is identical to or different from R3 and is independently as defined in R3, 1 is a molar fraction, 0 <1 <1, m is a molar fraction, 0 <m <1, 1 +m =1, and o is an integer in a range of 0 <o <1,000,
• wherein the non-halogen solvent includes at least one selected from the group consisting of 1,2,3,4-tetrahydronaphthalene, 1-methyl-naphthalene, 1,2-dimethylbenzene, 1,3,5-trimethylbenzene, benzene, styrene, tetrahydrothiophene benzaldehyde, acetophenone, diphenyl ether, nitrobenzene, pyridine, triethylamine, 4-vinylpyridine, and 4-methyl isopropylbenzene.