49results about "Lead halides" patented technology

The invention discloses an electronic waste efficient chlorination comprehensive recovery device and method, and relates to the technical field of chemical metallurgy, the electronic waste efficient chlorination comprehensive recovery device comprises a chlorination reaction cavity, a heating system, a vacuum system, an atmosphere control system and a condensation separation system; the heating system is used for controlling the temperature of the chlorination reaction cavity; the vacuum system is communicated with the heating system; the atmosphere control system comprises a chlorine gas source and a protective gas source; and the temperature of the condensation separation system is gradually reduced. Through the high-purity graphite heating assembly, the sealing structure and the atmosphere control system, the highest heating temperature is 1700 DEG C, the temperature limit of 1200 DEG C of a traditional quartz tube furnace can be broken through, the chlorine corrosion problem is solved, chlorine is not leaked, and the environment is not polluted. High-valued recovery of different metal resources can be achieved through low-temperature pyrolysis, high-temperature chlorination volatilization and three-stage condensation settling separation, and the method has the advantages of being low in energy consumption, high in recovery rate, environmentally friendly and the like and is suitable for industrial metal resource recovery.

The invention provides a molybdenum disulfide / perovskite heterojunction composite material and a preparation method and application thereof. The composite material is formed by growing mixed powder of lead halide and cesium halide on the surface of a molybdenum disulfide material. Comprising the following steps: (a) fully mixing lead halide and cesium halide powder according to a certain proportion, and placing the mixture in a crucible; (b) putting the crucible in which the mixed powder is placed into a tubular furnace, putting a molybdenum disulfide substrate above the crucible by 10cm, and pumping out air in the tubular furnace; (c) setting a tube furnace program, and heating and preserving heat at a certain speed and for a certain time; after the procedure is finished, the temperature of the tubular furnace is reduced to the room temperature, and the heterojunction composite material is obtained. The size of the composite material can reach a wafer level (2 inches), and the composite material has excellent photoelectric properties and has wide application prospects in photoelectric detectors with photoconductive structures.

To provide a method for industrially advantageously producing lead iodide of high purity and low water content in good yield.SOLUTION: The method for producing lead iodide includes a step of bringing lead oxide into contact with hydroiodic acid.SELECTED DRAWING: None

This invention discloses a ligand-assisted redeposition method for preparing lead halide perovskite nanocrystals. The preparation includes the following steps: (1) Weighing powders in sequence according to the following mass values: 0.147 g lead bromide, 0.085 g cesium bromide, and 0.09 g zinc bromide; (2) Placing the raw materials into a glass bottle containing solution A and stirring magnetically for 0.5 h, then adding the mixed solution into the glass bottle and stirring magnetically for 0.5 h until the solution is clear and transparent; (3) At room temperature, adding the precursor solution to a vigorously stirred antisolvent and stirring for 1 min to obtain a crude solution of lead halide perovskite nanocrystals, which is then centrifuged and purified to obtain the lead halide perovskite nanocrystal solution. The new preparation method of lead halide perovskite nanocrystals provided by this invention proposes a new preparation method of lead halide perovskite nanocrystals by changing the type of antisolvent and adding zinc bromide, and simplifies the purification steps and optimizes the luminescence properties of inorganic lead halide perovskite materials. The preparation method of the present invention has the advantages of low cost, simple operation and rapid preparation; the method of the present invention can prepare inorganic lead halide perovskite nanocrystal materials with adjustable luminescence range, good photoluminescence performance and high stability.

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.

The invention relates to the technical field of solar cells, in particular to a high-purity lead iodide synthesis method which comprises the following steps: S1, preparing a lead salt solution; s2, filtering to obtain a primary lead salt solution; s3, diluting the primary lead salt solution to 0.015-0.15 mol / L, carrying out activated carbon adsorption and ion exchange resin purification, carrying out reduced pressure evaporation, and washing to obtain a high-purity lead salt crystal; s4, dropwise adding the high-purity lead salt solution into the iodized salt solution for precipitation reaction, and filtering after aging; and S5, dispersing the precipitate in a first solvent, washing, and filtering to obtain the high-purity lead iodide. The invention relates to a high-purity lead iodide synthesis method, which comprises the following steps: applying a low-cost auxiliary solvent to a lead dissolution reaction, carrying out precipitation reaction on a lead salt solution, carrying out preliminary impurity removal treatment, carrying out resin adsorption and other combined processes, reducing the content of impurity elements in high-quality metal lead, and preparing high-purity lead iodide; the combined process is easy and convenient to operate, the used reagents are wide in source and low in cost, the final product is high in purity, operation conditions are mild, and the combined process is suitable for the requirement of large-scale process production.

The invention discloses a recovery method and application of lead halide in a waste perovskite photocatalyst, and an efficient ion exchange-directional precipitation strategy is used for recovering and reusing PbX2 resources from the perovskite photocatalyst. The recycled PbX2 resource can be applied to synthesis of the perovskite photocatalyst again to form a closed-loop cycle; the APbXbased photocatalyst synthesized by using the recovered PbX2 shows good photocatalytic performance in an ethanol generation experiment, can still keep relatively high photocatalytic efficiency after being recycled for multiple times, and has good stability and reusability; through a closed-loop recovery and reutilization strategy, lead halide in the waste perovskite is converted into a reusable resource, lead is prevented from leaking into the environment, and the risk of environmental pollution is reduced. The environment problem of lead in the waste perovskite photocatalyst is effectively solved, the recycled and prepared material is excellent in photocatalytic performance, the experiment cost is reduced, and a new thought and method are provided for sustainable development and resource application of the perovskite material.

Some embodiments of the present invention include an inventive method for preparing a perovskite solar cell (PSC). In certain embodiments, the method includes dissolving a functionalization material (e.g., a material that has been functionalized with one or more functionalizing compounds) in a solvent, depositing a deposition composition onto a perovskite layer, the deposition composition including the dissolved functionalization material, heating the deposition composition, and optionally removing some or all of the one or more functionalizing compounds from the deposition composition. Additional embodiments of the present invention are also disclosed herein.

The invention discloses a preparation method of centimeter-sized needle-shaped lead iodide, which comprises the following steps: putting an iodine elementary substance and a lead elementary substance at one end in a quartz glass tube; vacuumizing and sealing the quartz glass tube; placing the sealed quartz glass tube in a tubular furnace, and simultaneously suspending one end without raw materials outside; performing first heat treatment to separate the iodine elementary substance from the lead elementary substance in the quartz tube; carrying out second heat treatment to melt the lead elementary substance and react with the iodine elementary substance; carrying out third heat treatment to enable the reaction to be fully carried out; and finally, cooling to room temperature to obtain centimeter-sized needle-shaped lead iodide.

Disclosed is a method for manufacturing formamidine for perovskite materials for atomic layer deposition (ALD). The method for manufacturing formamidine according to the present invention comprises the steps of: (a) maintaining the temperature of a reactor at or below 20°C; (b) introducing a formamidine-acid compound, a basic compound, and water into the reactor; and (c) maintaining the temperature of the reactor at 60-70°C, and then raising the temperature to 70-80°C to manufacture the formamidine.

Some embodiments of the invention include inventive methods for preparing perovskite solar cells (PSCs). In certain embodiments, the method comprises dissolving a functionalized material (e.g., a material that is functionalized with one or more functionalizing compounds) in a solvent, depositing a deposit composition on a perovskite layer where the deposit composition comprises the dissolved functionalized material, heating the deposit composition, and optionally removing some or all of the one or more functionalizing compounds from the deposit composition. Additional embodiments of the invention are also disclosed herein.

A method of forming a halide perovskite nanocrystal array having a plurality of halide perovskite nanocrystals arranged in a pattern can include coating an array of pens with a first ink comprising at least one first perovskite precursor having the formula AX and at least one second perovskite precursor having the formula BX′2 dissolved in a solvent. A is a cation, B is a metal, and X and X′ are each a halogen. The method further includes contacting a substrate with the coated pen array to thereby deposit the first ink indias a pattern of printed indicia on the substrate. The printed indicia form nanoreactors on the substrate and a halide perovskite nanocrystal nucleates and grows within each nanoreactor to form the halide perovskite nanocrystal array.

The present invention provides a means for manufacturing a perovskite solar cell having high conversion efficiency and high durability. [Solution] One aspect of the present invention relates to a method for manufacturing a perovskite solar cell, comprising a coating step of coating a carrier transport layer with a precursor solution containing a precursor material for generating perovskite crystals, an additive represented by formula (I), and a solvent, and a heating step of heating the precursor layer obtained in the coating step to form a photoelectric conversion layer containing a perovskite film. Another aspect of the present invention relates to a perovskite solar cell. TIFF2026075720000004.tif27160

The invention relates to the technical field of nano materials, in particular to an amine ligand modified Yb < 3 + > doped CsPbCl3 nano crystal material and a preparation method thereof.The preparation method comprises the following steps that soluble Pb salt, soluble Yb salt, a cesium acetate ethanol solution, an amine ligand, oleic acid and octadecene are mixed, and a mixed reaction solution is obtained; the preparation method comprises the following steps: preparing a mixed reaction solution, heating the mixed reaction solution in a protective atmosphere, adding a mixed solution containing trimethylchlorosilane and ODE, terminating the reaction in an ice-water bath to obtain a turbid liquid, and centrifuging the turbid liquid to obtain the amine ligand modified Yb < 3 + > doped CsPbCl3 nanocrystal material. Along with the reduction of the amine chain length, the morphology of the nanocrystal is converted into a nanosheet from a nanocube, and the prepared crystal material has higher luminous efficiency and stability.

The invention relates to the field of wastewater treatment, in particular to a treatment method of perovskite precursor synthesis waste liquid. According to the method, the pH value of the strongly acidic perovskite precursor synthesis waste liquid is adjusted to be more than 3, so that the electrode potential of X2 / X-(X = Br <-> / Cl <-> / I <->) is reduced, the elemental halogen in the oxidation state can be reduced and recovered in the subsequent steps, and the recovery is thorough. The method is free of electrolysis, simple to operate and easy to industrialize; the used precipitant soluble lead is low in cost, and meanwhile, the recycled lead halide can be directly used for synthesizing the perovskite precursor, so that the waste of halogen elements is reduced, and the cost is saved.

To provide a nano material which can efficiently take out a hot carrier at high speed, and a method for producing the same.SOLUTION: A nano material is acquired by mixing a fullerene derivative having a carboxy group (-COOH) as a chemical anchor group with a quantum dot organic solution where a quantum dot of metal halide perovskite is dispersed, and substituting an oleic acid ligand bonded to the quantum dot with an electronegative fullerene derivative ligand obtained by removing a hydrogen ion from the carboxy group. The nano material has a quantum dot of metal halide perovskite represented by general formula ABX3(A=Cs, FA, MA, B=Pb2+, Sn2+, X=I-, Br- and Cl-), and an electronegative fullerene derivative ligand bonded to the quantum dot.SELECTED DRAWING: Figure 3

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.

The present invention provides a method for producing perovskite luminescent particles with a low FWHM and a PLQY exceeding 85%, even when the emission peak wavelength is 535 nm or higher. [Solution] The process of preparing a solution involves dissolving lead bromide, an organic acid, and an amine in a solvent, and controlling the process temperature T (°C) and process time t (seconds).

The invention discloses a method for recovering high-purity lead halide from a perovskite solar cell. The method comprises the following steps: firstly, carrying out hydroformylation on chloromethylated polystyrene resin, grafting with polyethyleneimine, and reacting with carbon disulfide to prepare selective adsorption resin; secondly, sequentially pretreating the perovskite cell with chlorobenzene to obtain a perovskite layer; immersing the perovskite layer in deionized water for ultrasonic treatment to obtain a mixed solution; adding the selective adsorption resin into the mixed solution, wherein the adsorbed liquid is an iodine-rich solution; carrying out gradient acid elution on the adsorbed resin, oxidizing through hydrogen peroxide to remove tin impurities, adjusting the pH step by step, precipitating, and dissolving to obtain a high-purity lead ion solution; finally, the pH value of the iodine-rich solution is adjusted, a high-purity lead ion solution is added for a precipitation reaction, and a high-purity lead halide product is obtained after washing and drying. The high-purity lead halide recovered by the method is high in purity and excellent in recovery efficiency.

The present application belongs to the technical field of waste lead-acid battery resource and lead iodide crystal preparation, and discloses a method for preparing lead iodide crystal by reducing lead paste through a short wet process, which comprises the following steps: S1: collecting waste lead paste from waste lead-acid batteries and reducing the waste lead paste to obtain reduced lead paste; the reduced lead paste is placed in an iodine salt solution and stirred to obtain a preliminary reaction solution; S2: adding a hydroiodic acid solution to the preliminary reaction solution, and then performing solid-liquid separation to obtain a crude crystal; S3: dissolving the crude crystal in an organic solvent, and then performing solid-liquid separation; the obtained filtrate is a lead iodide solution; S4: recrystallizing the lead iodide solution, and then performing solid-liquid separation to obtain a purified lead iodide crystal. Through the improvement of the overall design of the reaction participants and the process flow, the preparation of the lead iodide crystal can be realized through a short process, and the technical problems of long process steps, large reagent input, and low purity of the lead iodide product can be effectively solved.

The invention belongs to the technical field of nano material preparation and resource cyclic utilization, and particularly relates to a colloidal quantum dot liquid-phase ligand exchange matrix material recycling method based on purification and recrystallization, which aims at waste liquid generated in a liquid-phase ligand exchange process, recycles an unreacted halide matrix material, and improves the utilization rate of the colloid quantum dot liquid-phase ligand exchange matrix material. The invention develops an efficient, environment-friendly and easy-to-implement halide matrix material recovery technology, so that the cyclic utilization of resources is realized, the production cost is reduced, and the environmental pollution is reduced.

The present invention is a method for producing perovskite type quantum dots, wherein, using a plurality of precursor solutions each containing a different element, each of the plurality of precursor solutions is heated and sprayed as an aerosol of the precursor solution, and the plurality of aerosols are collided to cause a gas phase reaction, dropping in a solvent to synthesize core particles containing the different elements. This provides a method for producing quantum dots that enables control of the particle size and yields nanoparticles with a uniform particle size even in large-scale synthesis.

The invention discloses a preparation method and device of high-purity anhydrous lead iodide particles, the whole preparation process is completed in one time in a whole-process closed inert micro-positive pressure environment, and lead iodide is prevented from being in contact with air in the preparation process, so that the oxygen content of the lead iodide particles is extremely low, the purity is extremely high, and the quality and the stability are improved. During preparation, lead iodide steam is condensed into a liquid state in a medium-temperature area and then passes through a nozzle, and spherical particles are naturally formed by utilizing the surface tension of the liquid, so that the problems of poor flowability and non-uniform dispersion of a traditional flaky or flocculent product are solved, the obtained spherical particles have better flowability, and meanwhile, the specific surface of lead iodide is greatly reduced through granulation; and the phenomena of moisture absorption and reoxidation in the use process are effectively relieved. The high-purity anhydrous lead iodide particles can be used for preparing high-quality functional films, and are particularly suitable for being used as precursor materials of photoelectric devices such as high-performance perovskite solar cells.

The present invention provides a method for forming a thin film of a perovskite compound, and a method for manufacturing a solar cell using the same, comprising the steps of: supplying a B precursor into a chamber; primarily supplying an X precursor while maintaining a power source for plasma generation in an on state in the chamber; and supplying an A precursor into the chamber, wherein the B precursor comprises an organometallic compound containing a divalent cation, the X precursor comprises a hydrogen halide, and the A precursor comprises at least one compound selected from an amine compound and an amidine compound, and the step of supplying the A precursor is performed after the step of supplying the B precursor and the step of primarily supplying the X precursor.

The present invention relates to a method for forming a perovskite layer on a silicon layer, comprising: depositing a perovskite inorganic layer on the silicon layer by a vapor deposition process; and coating a perovskite organic layer on the inorganic layer by a solution process; wherein the inorganic layer is formed by sequentially or simultaneously depositing three or more inorganic halogen compounds each containing a different halogen element.

Providing oxygen-doped and fluorine-doped cesium and rubidium lead perovskite compounds for hard radiation detection. [Solution] Provided are an inorganic perovskite doped with oxygen or fluorine atoms, a method for producing a doped perovskite, and a hard radiation detector incorporating the doped perovskite as a photoactive layer. For this doped perovskite, lead oxide, lead fluoride, or a compound that thermally decomposes into lead oxide or lead fluoride is used as the dopant atom source. During the crystallization of the perovskite in the presence of this dopant atom source, oxygen or fluoride atoms from the dopant source are incorporated into the perovskite crystal lattice.

The invention discloses an ABX3 type perovskite material stabilized by an amorphous material and a preparation method of the ABX3 type perovskite material, and belongs to the field of semiconductor photoelectric materials and energy materials. The preparation method comprises the following steps: (1) preparing a perovskite thin film; (2) dissolving amino acid or a derivative thereof in water to prepare an amino acid aqueous solution, spin-coating the amino acid aqueous solution on a substrate, and removing a solvent to obtain an amino acid film; and (3) covering the perovskite thin film with the amino acid thin film, enabling amino acid or derivative molecules thereof to enter the perovskite thin film at 100-150 DEG C, and performing solid-phase reaction with the residual PbI2 to form an amorphous material, thereby obtaining the perovskite material stabilized by the amorphous material. The ABX3 type perovskite with high quality and ultrahigh stability is prepared by using the method, and the preparation method has the characteristics of simplicity, easiness in control, convenience in operation, relatively low cost and the like, and is convenient for large-scale production in factories.

The present invention discloses a method for optimizing silicon carbide ion beam polishing based on light metal ion-doped quantum dots, belonging to the technical field of sacrificial layer materials. The method of the present invention for in-situ growing a CsPbBr3 quantum dot sacrificial layer on the surface of a SiC material comprises the following steps: mixing a lead source, a cesium source, and a solvent to obtain a CsPbBr3 precursor solution; doping the CsPbBr3 precursor solution with light metal ions to obtain a light metal ion-doped CsPbBr3 precursor solution; and dripping the light metal ion-doped CsPbBr3 precursor solution onto the surface of the SiC material, coating it flat, heating it for crystallization, and annealing it to obtain a SiC material with an in-situ grown CsPbBr3 quantum dot sacrificial layer. The present invention uses the CsPbBr3 quantum dot layer as a sacrificial layer for a SiC wafer, improves the luminescence performance of its quantum dots by light metal ion doping, and simultaneously enhances the interfacial bonding between the quantum dot layer and the SiC wafer.

The present invention controls a process temperature T (°C) and a process time t (second) with which preparation of a solution is carried out by dissolving lead bromide, an organic acid, and an amine in a solvent.

This invention belongs to the field of waste resource recycling and optoelectronic material preparation technology, specifically relating to a method for preparing perovskite light-emitting / photovoltaic devices by recycling lead metal from waste lead-acid batteries. This method focuses on recycling waste lead-acid batteries through a "wet-fire-wet" green process. The disassembled electrode plates undergo desulfurization, calcination, and halogenation processes to recrystallize and obtain lead halides (PbI2 and PbBr2), which are then used as raw materials for preparing high-performance perovskite light-emitting / photovoltaic devices. The purpose of this invention is to solve the technical problems of complex production processes, high energy consumption, high cost, low recovery rate, and limited applicability in existing waste lead-acid battery recycling processes. It provides a method for purifying halides from lead paste materials from waste lead-acid batteries, changing the traditional approach to lead paste recycling. This method is simple, easy to operate, consumes little energy, has a high recovery rate, produces high-purity recycled products, and does not generate wastewater or waste gas byproducts, achieving the goal of energy conservation and emission reduction.