Method of treating semiconductor nanoparticle, semiconductor nanoparticle, electroluminescent device including the same

A semiconductor nanoparticle, comprising:

• a first semiconductor nanocrystal;
• and a semiconductor nanocrystal shell disposed on the first semiconductor nanocrystal,
• wherein the semiconductor nanoparticle further comprises a plurality of organic ligands,
• the plurality of organic ligands comprises a first organic ligand;
• and optionally a second organic ligand different from the first organic ligand,
• the first organic ligand comprises a branched alkyl group of C3 to C12, and the second organic ligand comprises an alkenyl group of C13 to C30,
• the semiconductor nanoparticle exhibits, in gas chromatography analysis, a first peak assigned to the first organic ligand and optionally a second peak assigned to the second organic ligand,
• and a fraction of the second organic ligand defined by the following equation is greater than or equal to about 0% and less than or equal to about 60%:
• Second
• ⁢
• organic
• ⁢
• ligand
• ⁢
• fraction
• =
• [
• ⁠
• second
• ⁢
• peak
• ⁢
• area
• ⁢
• correction
• ⁢
• value
• /
• (
• first
• ⁢
• peak
• ⁢
• area
• ⁢
• ⁢
• correction
• ⁢
• value
• +
• second
• ⁢
• peak
• ⁢
• area
• ⁢
• correction
• ⁢
• value
• )
• ]
• ×
• 100
• ⁢
• (
• %
• )
• wherein the second peak area correction value is a value obtained by dividing an area of the second peak by a molecular weight of the second organic ligand, and the first peak area correction value is a value obtained by dividing an area of the first peak by a molecular weight of the first organic ligand.

An ink composition comprising:

• a liquid vehicle;
• and a semiconductor nanoparticle,
• wherein the liquid vehicle comprises an organic solvent having a boiling point of greater than or equal to about 150° C. and less than or equal to about 380° C.,
• the semiconductor nanoparticle further comprises a plurality of organic ligands,
• wherein the plurality of organic ligands includes a first organic ligand and optionally a second organic ligand different from the first organic ligand,
• the first organic ligand comprises a branched alkyl group of C3 to C12, and the second organic ligand comprises an alkenyl group of C13 to C30,
• the semiconductor nanoparticle exhibits a first peak assigned to the first organic ligand and optionally a second peak assigned to the second organic ligand, in a gas chromatography analysis,
• and a fraction of the second organic ligand as defined by the following equation is less than or equal to about 60%:
• second organic ligand fraction=[second peak area correction value/(first peak area correction value+second peak area correction value)]×100(%)
• wherein the second peak area correction value is a value obtained by dividing an area of the second peak by a molecular weight of the second organic ligand, and the first peak area correction value is a value obtained by dividing an area of the first peak by a molecular weight of the first organic ligand.