Quantum dot, method of manufacturing the same, and electronic apparatus including the same

A method of preparing a quantum dot, the method comprising:

• providing a metal precursor solution comprising a copper halide, a Group III element halide, and a solvent;
• injecting a precursor of a Group VI element into the metal precursor solution;
• and
• preparing a quantum dot comprising copper, a Group III element, and a Group VI element by reacting the metal precursor solution into which the precursor of the Group VI element is injected, wherein
• the halides in the copper halide and the Group III element halide are each independently an iodide ion, a bromide ion, a chloride ion, or a fluoride ion, such that the quantum dot exhibits a photoluminescence spectrum having a maximum emission wavelength in a range of about 500 nm to about 750 nm and a full width at half maximum (FWHM) equal to or less than about 80 nm, and
• a molar ratio of a halide component to the copper of the quantum dot and a molar ratio of a halide component to the Group III element of the quantum dot is each independently in a range of about 0.01 to about 0.5.