Core-shell quantum dot and method for manufacturing core-shell quantum dot

A core-shell quantum dot comprising:

• a semiconductor nanocrystal core including Zn and at least one of S, Se, or Te, and having group II-VI elements;
• a semiconductor nanocrystal shell including a single or a plurality of shell layers having group II-VI elements coating the semiconductor nanocrystal core;
• wherein at least one shell layer is a Mg-containing shell layer.

A method for manufacturing core-shell quantum dots comprising:

• a step of synthesizing a semiconductor nanocrystal core including Zn and at least one of S, Se or Te, and having group II-VI elements in a solution, and
• a step of forming a shell layer containing Mg on a surface of the semiconductor nanocrystal core by adding a solution in which a cluster compound containing Zn and Mg is dissolved and a solution in which a group VI element precursor is dissolved to the solution in which the semiconductor nanocrystal core is synthesized.