Disclosed are processes for preparing hybrid perovskite quantum dots and the resulting hybrid perovskite quantum dots and uses thereof. Such quantum dots are useful as semiconductors in devices such as solar cells and light-emitting diodes.

A thin film includes a luminescent compound represented by Formula 1 and a random copolymer, wherein the random copolymer includes a first repeating unit including at least one aromatic ring, and a second repeating unit including a heteroatom including at least one lone pair of electrons,
[A].sub.n[Q].sub.m[X].sub.l  Formula 1
wherein, in Formula 1, A is a monovalent organic cation, a monovalent inorganic cation, or a combination thereof, Q is a divalent metal cation, a divalent metalloid cation, or a combination thereof, X is at least one monovalent halogen ion, n is an integer from 1 to 3, m is an integer from 1 to 2, and l is an integer from 1 to 5.

Provided are light-emitting particles having high stability while having perovskite-type semiconductor nanocrystals having excellent light-emitting properties, a method for producing the same, and a light-emitting particle dispersion, an ink composition, and a light-emitting element containing such light-emitting particles. The method for producing light-emitting particles of the present invention includes a step of preparing parent particles 91 composed of perovskite-type semiconductor nanocrystals 911 having light-emitting properties and a surface layer 912 which is composed of ligands coordinated on the surface of the semiconductor nanocrystal 911 and in which the ligand molecules form a siloxane bond with each other, and a step of forming a polymer layer 93 by coating the surface of the parent particle 91 with a hydrophobic polymer.

Disclosed are a perovskite color converter and a method for manufacturing the same. In order to maintain strong physical properties, the siloxane resin is synthesized in two steps. The silane precursor performs siloxane bond through a non-aqueous sol-gel reaction to form a siloxane resin, and a bond between methacrylate group, and a bond between methacrylate group and an organic ligand are formed through a secondary cross-linking reaction.

A compound has a perovskite type crystal structure containing A which is a monovalent cation, B which is a metal ion, and X which is a halide ion as components. The perovskite type crystal structure has a unit cell volume of 0.2000 nm.sup.3 or more and 0.2150 nm.sup.3 or less, an ionic radius of B of 0.7 Å or more and 1.4 Å or less, and an ionic radius of X of 0.5 Å or more and 2.5 Å or less.

An optical wavelength conversion composite material is provided and includes a first wavelength conversion material and an inorganic covering layer. The first wavelength conversion material is selected from the group consisting of a first quantum dot, a first phosphor, and a combination thereof. The inorganic covering layer covers the first wavelength conversion material, and the inorganic covering layer includes SiO.sub.2, TiO.sub.2 and Si.sub.xTi.sub.yO.sub.4−z, wherein x is from 0.1 to 0.4, y is from 0.5 to 0.8, and z is from 0.01 to 3.99. The optical wavelength conversion composite material has improved luminous efficiency and is stable. Besides, a related manufacturing method and a related optical wavelength conversion composite structure are provided.

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.

The present invention relates to the field of luminescent crystals (LCs), and more specifically to Quantum Dots (QDs) of formula A.sup.1.sub.aM.sup.2.sub.bX.sub.c, wherein the substituents are as defined in the specification. The invention provides methods of manufacturing such luminescent crystals, particularly by dispersing suitable starting materials in the presence of a liquid and by the aid of milling balls; to compositions comprising luminescent crystals and to electronic devices, decorative coatings; and to components comprising luminescent crystals.

Described herein are compositions and methods relating to light converting luminescent Zero-D perovskite composite materials.

Disclosed is a method for preparing a perovskite nanoparticle using a fluidic channel including a first step of forming a fluidic channel including a first outer tube, a second outer tube, and a storage tube capable of introducing flows of fluids, a second step of inducing formation of the perovskite nanoparticles by continuously preparing a mixed fluid with a laminar flow based on a flow rate by introducing a flow of a base fluid into the first outer tube, and introducing a flow of a dispersion fluid in the same direction as the flow of the base fluid into the second outer tube, and a third step of separating the perovskite nanoparticles from the mixed fluid stored in the storage tube.