A polyimide-based solution comprising a polyimide comprising a structure of Formula 1: wherein X is a tetravalent organic group derived from an acid dianhydride and Y is a divalent organic group derived from a diamine, or a polyamic acid comprising a structure of Formula 2: wherein X and Y are as defined in Formula 1, and a solvent wherein a coating of the polyimide-based solution on a substrate has a haze of 1% or less after storage at a temperature of 30 °C and a humidity of 70% for 30 minutes; wherein the solvent is a tertiary amine substituted with an alkyl group having two or more carbon atoms; wherein Y in each of the polyimide and the polyamic acid is derived from one or more diamines out of the group consisting of 4,4'-diaminodiphenyl ether, 4,4'-diaminodiphenylsulfide, 4,4'-diaminodiphenylsulfone, 4,4'-diaminobenzophenone, bis[4-(4-aminophenoxy)phenyl]methane, 2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2-bis[4-(4-aminophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane, 1,3-bis(4-aminophenoxy)benzene, 4,4'-bis(4-aminophenoxy)biphenyl, bis[4-(4-aminophenoxy)phenyl]ketone, bis[4-(4-aminophenoxy)phenyl]sulfoxide, bis[4-(4-aminophenoxy)phenyl]sulfone, bis[4-(4-aminophenoxy)phenyl]ether, 4,4'-bis(4-aminophenylsulfonyl)diphenyl ether, 4,4'-bis(4-aminothiophenoxy)diphenylsulfone, 1,4-bis[4-(4-aminophenoxy)benzoyl]benzene, 3,3'-diaminodiphenyl ether, 3,3-diaminodiphenylsulfide, 3,3'-diaminodiphenylsulfone, 3,3'-diaminobenzophenone, bis[4-(3-aminophenoxy)-phenyl]methane, 2,2-bis[4-(3-aminophenoxy)phenyl]propane, 2,2-bis[4-(3-aminophenoxy)phenyl-1,1,1,3,3,3-hexafluoropropane, 1,3-bis(3-aminophenoxy)benzene, 4,4'-bis(3-aminophenoxy)biphenyl, bis[4-(3-aminophenoxy)phenyl]ketone, bis[4-(3-aminophenoxy)phenyl]sulfide, bis[4-(3-aminophenoxy)phenyl]sulfone, bis[4-(3-aminophenoxy)phenyl]ether, 4,4'-bis(3-aminophenylsulfonyl)diphenyl ether, 4,4'-bis(3-aminothiophenoxy)diphenylsulfone, 1,4-bis[4-(3-aminophenoxy)benzoyl]benzene, 2,2'-bis(trifluoromethyl)benzidine and 2,2-bis[4-(-aminophenoxy)phenyl]hexafluoropropane. wherein X and Y are as defined in Formula 1, and a solvent wherein a coating of the polyimide-based solution on a substrate has a haze of 1% or less after storage at a temperature of 30 °C and a humidity of 70% for 30 minutes; wherein the solvent is a tertiary amine substituted with an alkyl group having two or more carbon atoms; wherein Y in each of the polyimide and the polyamic acid is derived from one or more diamines out of the group consisting of 4,4'-diaminodiphenyl ether, 4,4'-diaminodiphenylsulfide, 4,4'-diaminodiphenylsulfone, 4,4'-diaminobenzophenone, bis[4-(4-aminophenoxy)phenyl]methane, 2,2-bis[4-(4-aminophenoxy)phenyl]propane, 2,2-bis[4-(4-aminophenoxy)phenyl]-1,1,1,3,3,3-hexafluoropropane, 1,3-bis(4-aminophenoxy)benzene, 4,4'-bis(4-aminophenoxy)biphenyl, bis[4-(4-aminophenoxy)phenyl]ketone, bis[4-(4-aminophenoxy)phenyl]sulfoxide, bis[4-(4-aminophenoxy)phenyl]sulfone, bis[4-(4-aminophenoxy)phenyl]ether, 4,4'-bis(4-aminophenylsulfonyl)diphenyl ether, 4,4'-bis(4-aminothiophenoxy)diphenylsulfone, 1,4-bis[4-(4-aminophenoxy)benzoyl]benzene, 3,3'-diaminodiphenyl ether, 3,3-diaminodiphenylsulfide, 3,3'-diaminodiphenylsulfone, 3,3'-diaminobenzophenone, bis[4-(3-aminophenoxy)-phenyl]methane, 2,2-bis[4-(3-aminophenoxy)phenyl]propane, 2,2-bis[4-(3-aminophenoxy)phenyl-1,1,1,3,3,3-hexafluoropropane, 1,3-bis(3-aminophenoxy)benzene, 4,4'-bis(3-aminophenoxy)biphenyl, bis[4-(3-aminophenoxy)phenyl]ketone, bis[4-(3-aminophenoxy)phenyl]sulfide, bis[4-(3-aminophenoxy)phenyl]sulfone, bis[4-(3-aminophenoxy)phenyl]ether, 4,4'-bis(3-aminophenylsulfonyl)diphenyl ether, 4,4'-bis(3-aminothiophenoxy)diphenylsulfone, 1,4-bis[4-(3-aminophenoxy)benzoyl]benzene, 2,2'-bis(trifluoromethyl)benzidine and 2,2-bis[4-(-aminophenoxy)phenyl]hexafluoropropane. <EOS>