A quantum dot complex comprising: an organic ligand compound bonded to the surface of the quantum dot, and a polymeric outer layer comprising a copolymer, which comprises; a first repeating unit comprising a moiety capable of intermolecularly interacting with the organic ligand compound, the quantum dot surface, or a combination thereof, and a second repeating unit comprising a reactive moiety; wherein the first repeating unit is represented by Chemical Formula 3: wherein, R 1 , R 2 , R 3 , and R 4 are independently hydrogen, C1 to C20 alkyl group, a C1 to C20 alkyl group substituted with a functional group capable of bonding to the surface of the quantum dot, a C6 to C40 aryl group, a C6 to C40 aryl group substituted with a functional group capable of bonding to the surface of the quantum dot, a C7 to C40 arylalkyl group, a C7 to C40 arylalkyl group substituted with a functional group capable of bonding to the surface of the quantum dot, a C1 to C30 fluoroalkyl group, a C1 to C30 fluoroalkyl group substituted with a functional group capable of bonding to the surface of the quantum dot, a C1 to C30 perfluoroalkyl group, or a C1 to C30 perfluoroalkyl group substituted with a functional group capable of bonding to the surface of the quantum dot, provided that R 1 , R 2 , R 3 and R 4 are not simultaneously hydrogen; and wherein the second repeating unit is represented by one of Chemical Formula 4 to Chemical Formula 12: wherein, in the chemical formulae, R is H, a C1 to C10 alkyl group, or a C6 to C20 aryl group, and * is a linking portion to an adjacent atom present in a backbone of the copolymer. an organic ligand compound bonded to the surface of the quantum dot, and a polymeric outer layer comprising a copolymer, which comprises; a first repeating unit comprising a moiety capable of intermolecularly interacting with the organic ligand compound, the quantum dot surface, or a combination thereof, and a second repeating unit comprising a reactive moiety; wherein the first repeating unit is represented by Chemical Formula 3: wherein, R 1 , R 2 , R 3 , and R 4 are independently hydrogen, C1 to C20 alkyl group, a C1 to C20 alkyl group substituted with a functional group capable of bonding to the surface of the quantum dot, a C6 to C40 aryl group, a C6 to C40 aryl group substituted with a functional group capable of bonding to the surface of the quantum dot, a C7 to C40 arylalkyl group, a C7 to C40 arylalkyl group substituted with a functional group capable of bonding to the surface of the quantum dot, a C1 to C30 fluoroalkyl group, a C1 to C30 fluoroalkyl group substituted with a functional group capable of bonding to the surface of the quantum dot, a C1 to C30 perfluoroalkyl group, or a C1 to C30 perfluoroalkyl group substituted with a functional group capable of bonding to the surface of the quantum dot, provided that R 1 , R 2 , R 3 and R 4 are not simultaneously hydrogen; and wherein the second repeating unit is represented by one of Chemical Formula 4 to Chemical Formula 12: wherein, in the chemical formulae, R is H, a C1 to C10 alkyl group, or a C6 to C20 aryl group, and * is a linking portion to an adjacent atom present in a backbone of the copolymer. <EOS>