Luminescent crystals and manufacturing thereof
AssigneeAvantama AG
InventorsNorman Albert Lüchinger, Marek Oszajca, Patrick Kissel, Loredana Protesescu, Maksym Kovalenko, Franziska Krieg
Life of this patent
Estimating the term…
Abstract
The present invention relates to the field of luminescent crystals (LCs), and more specifically to Quantum Dots (QDs) of formula A1aM2bXc, 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.
Claims24
A composition in the form of a suspension, the suspension comprising:
- (a) an internal solid phase;
- and
- (b) an external liquid phase,
- wherein the internal solid phase (a) comprises:
- (i) luminescent crystals of 3-500 nm size of formula (I)
- [M1A1]aM2bXc (I),
- wherein:
- A1 represents one or more organic cations selected from the group consisting of ammonium, formamidinium, guanidinium, imidazolium, pyridinium, pyrrolidinium, and protonated thiourea,
- M1 is optional, and if present, represents one or more alkaline metals selected from Cs, Rb, K, Na, and Li,
- M2 represents one or more metals selected from the group consisting of Ge, Sn, Pb, Sb, and Bi,
- X represents one or more anions selected from the group consisting of chloride, bromide, iodide, cyanide, thiocyanate, isothiocyanate and sulfide,
- a represents 1-4,
- b represents 1-2,
- c represents 3-9;
- and
- wherein the external liquid phase (b) comprises:
- (ii) surfactant selected from the group of zwitterionic surfactants;
- (iii) optionally solvent, said solvent, if present, selected from the group of aliphatic hydrocarbons, aromatic hydrocarbons, ethers, esters, alcohols, and ketones;
- and
- (iv) optionally polymer and/or pre-polymer, said polymer or pre-polymer, if present, selected from the group of acrylates, epoxies, vinyl polymers, urethanes, styrenes, silicones and cyclic olefinic copolymers.
A solid polymer composition, comprising:
- (i) luminescent crystals of 3-500 nm size of formula (I)
- [M1A1]aM2bXc (I),
- wherein:
- A1 represents one or more organic cations selected from the group consisting of ammonium, formamidinium, guanidinium, imidazolium, pyridinium, pyrrolidinium, protonated thiourea,
- M1 is optional, and if present, represents one or more alkaline metals selected from Cs, Rb, K, Na, Li,
- M2 represents one or more metals selected from the group consisting of Ge, Sn, Pb, Sb, and Bi,
- X represents one or more anions selected from the group consisting of chloride, bromide, iodide, cyanide, thiocyanate, isothiocyanate and sulfide,
- a represents 1-4,
- b represents 1-2,
- c represents 3-9;
- and
- (ii) surfactant selected from the group of zwitterionic surfactants;
- and
- (iv) a hardened/cured polymer, said polymer selected from the group of acrylate polymers, epoxy polymers, vinyl polymers, urethane polymers, styrene polymers, silicone polymers and cyclic olefin copolymers.
Dependencies are inferred from the claim text.