Core-shell structured perovskite particle light-emitter, method of preparing the same and light emitting device using the same

A core-shell structured perovskite particle comprising:

• a core comprising at least one halide perovskite nanocrystal;
• and
• a shell surrounding the core,
• wherein the shell comprises at least one selected from the group consisting of an inorganic semiconductor and an inorganic insulating substance,
• wherein the core, unlike quantum dots, has a band gap energy determined by a perovskite crystal structure of the at least one halide perovskite nanocrystal rather than the size thereof,
• wherein a plurality of ligands are attached to surface of the shell and are configured to make the at least one halide perovskite nanocrystal more dispersible in a medium than without such ligands, and
• wherein the at least one halide perovskite nanocrystal has an ABX3, A2BX4, or ABX4, where A is an organic ammonium or metal, B is a metal, and X is a halogen.

A core-shell structured inorganic metal halide perovskite particle comprising:

• a core comprising at least one inorganic metal halide perovskite nanocrystal;
• and
• a shell surrounding the core,
• wherein the at least one inorganic metal halide perovskite nanocrystal has a size between about 20 nm to about 100 nm and, unlike quantum dots, has a first band gap energy determined by a perovskite crystal structure of the at least one inorganic metal halide perovskite nanocrystal rather than the size thereof,
• wherein the shell comprises a material having a second band gap energy that is larger than the first band gap energy,
• wherein a plurality of ligands are attached to surface of the shell and are configured to make the at least one inorganic metal halide perovskite nanocrystal more dispersible in a medium than without such ligands, and
• wherein the at least one inorganic metal halide perovskite nanocrystal has an ABX3, A2BX4, or ABX4 structure, where A is a metal, B is a metal, and X is a halogen.

A core-shell structured perovskite particle comprising:

• a core comprising at least one halide perovskite nanocrystal;
• and
• a shell surrounding the core,
• wherein the at least one halide perovskite nanocrystal unlike a quantum dot has a first band gap energy determined by a perovskite crystal structure of the at least one halide perovskite nanocrystal rather than the size thereof,
• wherein the shell comprises a material having a second band gap energy that is larger than the first band gap energy,
• wherein a plurality of ligands attached to the at least one halide perovskite nanocrystal and configured to make the at least one halide perovskite nanocrystal more dispersible than without such ligand in a medium, and
• wherein the at least one halide perovskite nanocrystal has an ABX3, A2BX4, or ABX4 structure, where A is an organic ammonium or metal, B is a metal, and X is a halogen.