Semiconductor nanocrystal, light-emitting film, production method of the light-emitting film, light emitting device, and display device

A method of producing a light-emitting film, comprising

• disposing a film comprising a plurality of semiconductor nanocrystals on a substrate, and
• treating the plurality of semiconductor nanocrystals with a solution comprising an inorganic metal salt in a polar solvent to bind an anion of the inorganic metal salt to the plurality of semiconductor nanocrystals, and treating the plurality of semiconductor nanocrystals with a solution comprising a first organic ligand to bind the first organic ligand to the plurality of semiconductor nanocrystals,
• wherein the inorganic metal salt comprises an inorganic metal halide, an inorganic metal sulfate, an inorganic metal nitrate, an inorganic metal thiocyanate, or a combination thereof, and
• first organic ligand comprises a substituted or unsubstituted C6 to C30 aromatic ring group and a carboxylate group, a substituted or unsubstituted C3 to C30 aromatic heterocyclic group and a carboxylate group, or a combination thereof.

A semiconductor nanocrystal comprising an anion of an inorganic metal salt bound to a surface of the semiconductor nanocrystal,

• a first organic ligand bound to a surface of the semiconductor nanocrystal, and
• a second organic ligand comprising an anion of RCOOH, RNH2, R2NH, R3N, RSH, RH2PO, R2HPO, R3PO, RH2P, R2HP, R3P, ROH, RCOOR′, RPO(OH)2, RHPOOH, or R2POOH, wherein, R and R′ are independently hydrogen, C1 to C40 substituted or unsubstituted aliphatic hydrocarbon, or C6 to C40 substituted or unsubstituted aromatic hydrocarbon, or a combination thereof, and in each ligand, at least one R is not hydrogen, the second ligand bound to the surface of the semiconductor nanocrystal
• wherein the inorganic metal salt comprises an inorganic metal halide, an inorganic metal sulfate, an inorganic metal nitrate, an inorganic metal thiocyanate, or a combination thereof, and
• wherein the first organic ligand is represented by Chemical Formula 1 compound:
• X-L-Ar1Y]n Chemical Formula 1
• wherein, in Chemical Formula 1,
• Ar1 is a substituted or unsubstituted monocyclic aromatic ring group, a substituted or unsubstituted condensed polycyclic aromatic ring group, or a combination thereof joined by a linker, or an aromatic ring group comprising two or more independently substituted or unsubstituted monocyclic aromatic ring groups, or two or more independently substituted or unsubstituted condensed polycyclic aromatic ring groups, each of which is joined by a linker,
• L is a single bond, a substituted or unsubstituted C1 to C30 alkylene group, or an unsaturated linker of —CRa═CRb—, wherein, Ra and Rb are independently hydrogen, or an optionally substituted C1 to C10 alkyl group,
• X is a carboxylate group,
• Y is a hydroxy group, a halogen, an amine group, or a nitro group, and
• n is an integer of 0 to 6.