Quantum dot, method of preparing quantum dot, optical member including quantum dot, and electronic device including quantum dot

A method of preparing a quantum dot, wherein

• the quantum dot comprises:
• a core including indium (In), A1, and A2;
• and
• a shell covering the core,
• A1 is a Group V element,
• A2 is a Group III element other than indium,
• the core includes a first region and a second region covering the first region,
• the first region does not include A2, and includes indium and A1,
• the second region includes indium, A1, and A2,
• indium and A2 are alloyed with each other in the second region,
• the quantum dot emits blue light having a maximum emission wavelength in a range of about 400 nm to about 490 nm, and
• the method comprises:
• providing a first particle including indium (In) and A1;
• forming the core by contacting the first particle with a composition including an A2-containing precursor at a temperature in a range of about 210° C. to about 340° C.;
• and
• forming the shell covering the core.