Semiconductor nanocrystal particles, production methods thereof, and devices including the same

A method of producing a quantum dot comprising zinc selenide, the method comprising:

• providing an organic ligand mixture comprising a carboxylic acid compound, a primary amine compound, a secondary amide compound represented by Chemical Formula 1, and a first organic solvent:
• RCONHR Chemical Formula 1
• wherein each R is the same or different and each independently is a substituted or unsubstituted aliphatic hydrocarbon having a carbon number of greater than or equal to 5, a substituted or unsubstituted aromatic hydrocarbon having a carbon number of greater than or equal to 6, or a substituted or unsubstituted alicyclic hydrocarbon having a carbon number of greater than or equal to 3;
• heating the organic ligand mixture in an inert atmosphere at a first temperature to obtain a heated organic ligand mixture;
• adding a zinc precursor, a selenium precursor, and optionally a tellurium precursor to the heated organic ligand mixture to obtain a reaction mixture, wherein the zinc precursor does not comprise oxygen;
• and
• heating the reaction mixture at a first reaction temperature to synthesize a first semiconductor nanocrystal particle.