摘要:
A finely divided metal-containing compound can be efficiently prepared by irradiating a mixed vapor phase of an organometallic compound in a concentration to exceed a specified lower limit and a reactant gaseous compound with laser beams having an incident energy density to exceed a specified lower limit. When the reactant gaseous compound in the vapor phase is an oxygen-containing compound, e.g., air, the resultant powdery product is an oxide of the metallic element of the organometallic compound. When the reactant gaseous compound in the vapor phase is a halogen-containing compound, e.g., methyl halides, the resultant powdery product is a halide of the metallic element of the organometallic compound. When the reactant gaseous compound is a second organometallic compound, of which the metallic element is not the same as the metallic element in the first organometallic compound, the resultant powdery product is a composite metallic powder of which the distribution of the two metallic elements is uniform throughout each particle. No particles of either one of the metallic elements alone are contained in the powder as evidenced by the EPMA analysis.
摘要:
This invention provides a method for the preparation of ultrapure active metal fluorides of increased purity from their metal oxides by reacting an active metal with a predetermined amount of HF(aq) to form a solid reaction product which is dried under controlled heating to form a hydrated fluoride. This hydrated active metal fluoride is then subjected to reactive atmosphere processing comprising hydrofluoric acid vapor in a CO.sub.2 reactive carrier gas and a selected halide compound in the gas phase for a predetermined period of time to further increase anion purity.
摘要:
A method for preparing photoactive perovskite materials. The method comprises the steps of: introducing a lead halide and a first solvent to a first vessel and contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution, introducing a Group 1 metal halide a second solvent into a second vessel and contacting the Group 1 metal halide with the second solvent to dissolve the Group 1 metal halide to form a Group 1 metal halide solution, and contacting the lead halide solution with the Group 1 metal halide solution to form a thin-film precursor ink. The method further comprises depositing the thin-film precursor ink onto a substrate, drying the thin-film precursor ink to form a thin film, annealing the thin film; and rinsing the thin film with a salt solution.
摘要:
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.
摘要:
Compositions comprise a perovskite and a non-perovskite. Perovskites comprise AxA′yA″(1−x−y)BX3, 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 (NH2)2CH+, CH3NH3+, Cs+, Rb+, or (NH2)2(C═NH2)+, 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.
摘要:
An object of the present disclosure is to provide an all solid fluoride ion battery that has a favorable capacity property. The present disclosure achieves the object by providing an all solid fluoride ion battery comprising: a cathode layer, an anode layer, and a solid electrolyte layer formed between the cathode layer and the anode layer; wherein the anode layer includes a metal fluoride containing an M1 element, an M2 element, and a F element; the M1 element is a metal element that fluorination and defluorination occur at a potential, versus Pb/PbF2, of −2.5 V or more; the M2 element is a metal element that neither fluorination nor defluorination occur at a potential, versus Pb/PbF2, of −2.5 V or more; and the M2 element is a metal element that, when in a form of a fluoride, fluoride ion conductivity is 1×10−4 S/cm or more at 200° C.
摘要:
A method for preparing photoactive perovskite materials. The method comprises the steps of: introducing a lead halide and a first solvent to a first vessel and contacting the lead halide with the first solvent to dissolve the lead halide to form a lead halide solution, introducing a Group 1 metal halide a second solvent into a second vessel and contacting the Group 1 metal halide with the second solvent to dissolve the Group 1 metal halide to form a Group 1 metal halide solution, and contacting the lead halide solution with the Group 1 metal halide solution to form a thin-film precursor ink. The method further comprises depositing the thin-film precursor ink onto a substrate, drying the thin-film precursor ink to form a thin film, annealing the thin film; and rinsing the thin film with a salt solution.
摘要:
Provided are perovskite nanocrystalline particle and an optoelectronic device using the same. The perovskite nanocrystalline particle may include a perovskite nanocrystalline structure while being dispersible in an organic solvent. Accordingly, the perovskite nanocrystalline particle in accordance with the present invention has therein a perovskite nanocrystal having a crystalline structure in which FCC and BCC are combined; forms a lamellar structure in which an organic plane and an inorganic plane are alternately stacked; and can show high color purity since excitons are confined to the inorganic plane. In addition, the perovskite nanocrystalline particle have a particle size greater than or equal to a Bohr diameter beyond a quantum confinement effect, and simultaneously can implement high emission efficiency and emission wavelength which is almost not dependent on particle size. Furthermore, the perovskite nanocrystalline particle in accordance with the present invention, as a nanoparticle which is dispersible in an organic solvent, is applicable in various electronic devices such as light emitting devices, lasers, solar cells, etc.