Nanocrystal particles and processes for synthesizing the same

A process for synthesizing a nanocrystal particle, the process comprising:

• obtaining a first mixture including a first precursor, a ligand compound, and a solvent;
• optionally heating the first mixture;
• contacting a source of a halogen element, a second precursor, and optionally a first nanocrystal with the first mixture, which is optionally heated, to obtain a second mixture;
• and
• heating the second mixture to a reaction temperature to react the first precursor and the second precursor to obtain a nanocrystal particle comprising a semiconductor material and the halogen.

A nanoparticle comprising at least one semiconductor material and at least one halogen element,

• wherein the nanocrystal particle has a core-shell structure including a core comprising a first semiconductor nanocrystal, and a shell surrounding the core and comprising a crystalline or amorphous material,
• wherein the at least one halogen element is present as being doped therein or as a metal halide, and
• wherein the first semiconductor nanocrystal comprises a metal selected from a Group II metal, a Group III metal, a Group IV metal, and a combination thereof, and
• wherein the crystalline or amorphous material of the shell comprises a metal which is different from the metal included in the first semiconductor nanocrystal of the core and which is selected from a Group I metal, a Group II metal, a Group III metal, a Group IV metal, and a combination thereof.