Quantum dot, optical member and electronic apparatus including the quantum dot, and method for preparing quantum dot

An electronic apparatus comprising a quantum dot, wherein

• the quantum dot comprises:
• a core comprising copper (Cu), A1, and B1;
• and
• a first shell covering the core and comprising A3 and B2,
• wherein an atomic ratio of silicon (Si) to B1 comprised in the core is about 0.001 to about 0.05,
• wherein A1 is a Group III element,
• wherein A3 is a Group II element or Group III element, and
• wherein B1 and B2 are each independently a Group VI element.

A method, comprising:

• preparing a first-1 composition comprising a copper (Cu)-containing precursor and an A1-containing precursor;
• preparing a core comprising copper (Cu), A1, and B1 by utilizing a first-2 composition comprising the first-1 composition and a B1-containing precursor;
• and
• preparing a first shell covering the core and comprising A3 and B2 by utilizing a second composition comprising the core, an A3-containing precursor, and a B2-containing precursor,
• wherein an atomic ratio of silicon (Si) to B1 comprised in the core is about 0.001 to about 0.05,
• wherein the preparing of the core comprising copper (Cu), A1, and B1 by utilizing the first-2 composition further comprises treating the first-2 composition with an inert gas,
• wherein A1 is a Group III element,
• wherein A3 is a Group II element,
• wherein B1 and B2 are each independently a Group VI element, and
• wherein the method is a method of preparing a quantum dot.