Nanocrystal particles and processes for synthesizing the same

A nanocrystal particle 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 semiconductor material, and
• wherein the at least one halogen element is present as being doped therein or as a metal halide,
• wherein the at least one halogen element comprises fluorine,
• wherein the fluorine is included in an interface between the core and the shell, in the shell, or in the interface between the core and the shell and in the shell,
• wherein the semiconductor nanocrystal of the core comprises InP,
• wherein the crystalline or amorphous semiconductor material of the shell comprises ZnS, ZnSe, ZnSeS, or a combination thereof,
• wherein the nanocrystal particle comprises a bond between the zinc and the fluorine,
• wherein the nanocrystal particle has a quantum yield of greater than or equal to about 50%, and
• wherein the nanocrystal particle does not include cadmium.