The present invention relates to a method for producing core-shell nanocrystals consisting of a metal-containing nanocrystal core and a shell layer comprising at least one metal oxide material having variable shell thicknesses, and use of the core-shell nanocrystals for different applications.

The present invention relates to a method for producing core-shell nanocrystals consisting of a metal-containing nanocrystal core and a shell layer comprising at least one metal oxide material having variable shell thicknesses, and use of the core-shell nanocrystals for different applications.

The present disclosure relates to a mixture that includes a perovskite precursor, a solvent, and an additive that includes at least one of a first amine, a ketone, an aldehyde, a non-nucleophilic sterically hindered base, and/or a halogen-containing compound, where, upon removal of the solvent and the additive, the perovskite precursor is capable of being transformed into a perovskite.

The present disclosure relates to a mixture that includes a perovskite precursor, a solvent, and an additive that includes at least one of a first amine, a ketone, an aldehyde, a non-nucleophilic sterically hindered base, and/or a halogen-containing compound, where, upon removal of the solvent and the additive, the perovskite precursor is capable of being transformed into a perovskite.

Compositions comprise a perovskite and a non-perovskite. Perovskites comprise A.sub.xA′.sub.yA″.sub.(1−x−y)BX.sub.3, and non-perovskites may comprise A″, B and X, where A is a first cation, A′ is a second cation, A″ is a third cation, B is a fourth cation, X is an anion. In some instances, A, A′, and A″ are each independently (NH.sub.2).sub.2CH.sup.+, CH.sub.3NH.sub.3.sup.+, Cs.sup.+, Rb.sup.+, or (NH.sub.2).sub.2(C═NH.sub.2).sup.+, with the proviso that A, A′, and A″ are each different. The perovskite may have a first crystal structure in which the anion is corner-sharing, the non-perovskite may have a second crystal structure comprising at least one of an orthorhombic structure, a hexagonal structure, or a perovskite-like structure, and 1−x−y may be greater than about 0.15.

Compositions comprise a perovskite and a non-perovskite. Perovskites comprise A.sub.xA′.sub.yA″.sub.(1−x−y)BX.sub.3, and non-perovskites may comprise A″, B and X, where A is a first cation, A′ is a second cation, A″ is a third cation, B is a fourth cation, X is an anion. In some instances, A, A′, and A″ are each independently (NH.sub.2).sub.2CH.sup.+, CH.sub.3NH.sub.3.sup.+, Cs.sup.+, Rb.sup.+, or (NH.sub.2).sub.2(C═NH.sub.2).sup.+, with the proviso that A, A′, and A″ are each different. The perovskite may have a first crystal structure in which the anion is corner-sharing, the non-perovskite may have a second crystal structure comprising at least one of an orthorhombic structure, a hexagonal structure, or a perovskite-like structure, and 1−x−y may be greater than about 0.15.

A method for depositing an inorganic perovskite layer, comprising the following steps: providing a substrate and an inorganic target; positioning the substrate and the target in a close-space sublimation furnace; depositing an inorganic perovskite layer onto the substrate by sublimation of the target.

A method for depositing an inorganic perovskite layer, comprising the following steps: providing a substrate and an inorganic target; positioning the substrate and the target in a close-space sublimation furnace; depositing an inorganic perovskite layer onto the substrate by sublimation of the target.

A light-emitting layer for a halide perovskite light-emitting device, a method for manufacturing the same and a perovskite light-emitting device using the same are disclosed. The light-emitting layer can be manufactured by forming a first nanoparticle thin film by coating, on a member, a solution comprising halide perovskite nanoparticles having a halide perovskite nanocrystalline structure. Thereby, a nanoparticle light emitter has therein a halide perovskite having a crystal structure in which FCC and BCC are combined; and can show high color purity. In addition, it is possible to improve the luminescence efficiency and luminance of a device by making perovskite as nanoparticles and then introducing the same into a light-emitting layer.

A light-emitting layer for a halide perovskite light-emitting device, a method for manufacturing the same and a perovskite light-emitting device using the same are disclosed. The light-emitting layer can be manufactured by forming a first nanoparticle thin film by coating, on a member, a solution comprising halide perovskite nanoparticles having a halide perovskite nanocrystalline structure. Thereby, a nanoparticle light emitter has therein a halide perovskite having a crystal structure in which FCC and BCC are combined; and can show high color purity. In addition, it is possible to improve the luminescence efficiency and luminance of a device by making perovskite as nanoparticles and then introducing the same into a light-emitting layer.