39results about How to "Large grain" patented technology

The invention discloses a perovskite solar cell based on 1, 2PDADI (1, 2-propane diamine hydriodic acid) interface modification and a preparation method thereof, and belongs to the technical field of perovskite solar photovoltaics. The device structure of the cell sequentially comprises ITO conductive glass, a SnO2 electron transport layer, a 1, 2PDADI modification layer, a perovskite light absorption layer, a hole transport layer and an Ag counter electrode from bottom to top, the preparation method specifically comprises the following steps: (1) cleaning and blow-drying the ITO conductive glass; (2) spin-coating SnO2 nano dispersion liquid, and carrying out annealing treatment; (3) spin coating of a 1, 2PDADI / IPA solution is carried out, and annealing treatment is carried out; (4) spin-coating a perovskite precursor solution, and performing annealing treatment; (5) spin coating of a Spiro-OMeTAD precursor solution is carried out, and oxidation treatment is carried out; and (6) carrying out vacuum evaporation on an Ag counter electrode to obtain the 1, 2PDADI interface modified perovskite solar cell. The preparation process is simple and convenient, the cost is low, the prepared perovskite solar cell is small in hysteresis effect and high in photoelectric conversion efficiency, and a feasible thought and method are provided for commercialization of the perovskite solar cell.

The invention provides a perovskite solution, a perovskite thin film, a preparation method of the perovskite thin film and a photovoltaic device, the perovskite solution comprises a precursor solution and an amino acid additive, and the concentration of the amino acid additive in the perovskite solution is 0.001-0.1 mmol / mL; the amino acid additive comprises any one or a combination of at least two of histidine, a histidine derivative, aspartic acid and an aspartic acid derivative. According to the invention, the influence of air moisture can be avoided, the stability is high, and a photovoltaic device with high photoelectric conversion efficiency can be obtained.

The invention discloses a ceramic heat sink material and a preparation method thereof, and the preparation method comprises the following steps: S1, taking a Si-Al alloy ingot, porous C-Si3N4 and a sintering aid as raw materials, and carrying out pre-sintering to obtain a compound; and S2, carrying out spark plasma sintering treatment on the compound in a vacuum atmosphere to obtain the ceramic heat sink material, according to the preparation method, the Si-Al alloy ingot and the porous C-Si3N4 are taken as raw materials, the Si-Al alloy ingot permeates into the porous C-Si3N4 material under the heating melting condition, the composite AlN-SiC ceramic material which is uniform in phase distribution and compact is formed in situ in combination with the sintering aid, the obtained ceramic heat sink material is large in crystal grain and small in number of crystal boundaries, scattering of phonons is reduced during heat conduction, and the heat sink material has the advantages of being high in heat sink efficiency and good in heat sink performance. The heat conductivity is improved; meanwhile, the prepared ceramic heat sink material is high in grain density and uniformity, low in oxygen content in crystal lattices and moderate in impurity-phase silicon content, so that the heat conductivity is high, and the ceramic heat sink material is suitable for being used as a heat sink ceramic substrate.

The invention relates to a perovskite thin film, a passivation method and application, belongs to the technical field of photoelectric functional materials and devices, and aims to solve the problems of low efficiency, poor stability and the like of a solar cell caused by perovskite crystal defects in the prior art. The perovskite thin film passivation method comprises the following steps: adding 1, 4-butane sultone into a perovskite precursor solution to obtain a mixed solution, processing the mixed solution to form a perovskite precursor thin film, and carrying out annealing treatment to obtain the perovskite thin film. By adding BuSO, the nucleation rate of perovskite can be effectively reduced, so that the large-grain and high-quality perovskite thin film is obtained, the BuSO can be subjected to halogen ion induced ring-opening reaction in the annealing process, generated chain ions are distributed on the grain boundary and the surface and act with perovskite, compounding of a bulk phase and an interface is reduced, and the performance of the perovskite thin film is improved. And the efficiency and the long-term stability of the solar cell are effectively improved.

According to the high-grade non-oriented silicon steel with the high favorable texture ratio and the production method of the high-grade non-oriented silicon steel, primary cold rolling reduction, the reduction rate of each pass and the reduction rate of secondary cold rolling are regulated and controlled, meanwhile, the normalizing procedure is replaced with the high intermediate annealing temperature, the cost is reduced, and the production efficiency is improved. A large grain size is obtained before secondary cold rolling, a large number of shear bands are formed on the surface layer and the center layer of the cold-rolled sheet after secondary cold rolling, the area of the shear bands is far larger than the area of a grain boundary, the cold-rolled sheet is promoted to become a leading position of recrystallization nucleation, and meanwhile more {hk0} lt is achieved through a three-section continuous annealing process suitable for subsequent procedures; 001gt, 001gt; and {hkl} lt; 110gt, 110gt; grains of the texture grow up, grains of other orientations are increased, and {hkl} lt is further reduced; 111gt, 111gt; the proportion of the texture and the magnetic induction intensity B50 of the product are improved by more than 0.018 T, and B50 is greater than or equal to 1.66 T.

The invention discloses an anti-erosion and anti-permeation yttrium oxide refractory material as well as a preparation method and application thereof. According to the method, a small amount of sintering aid powder is doped into YO powder to reduce the sintering temperature, and meanwhile, the granularity of the powder, cold isostatic pressing parameters and a sintering process are regulated and controlled to prepare the YO refractory material which is high in density and large in grain size and does not generate a second phase. The method disclosed by the invention is suitable for preparing the powder for the Y2O3 crucible and the cold isostatic pressing formed Y2O3 crucible, and the erosion and infiltration resistance of the crucible to the titanium-aluminum alloy melt can be effectively improved.

The invention discloses a perovskite solar cell and a preparation method thereof, a laminated solar cell, a cell module and an electric device. The perovskite solar cell comprises a perovskite active layer, and the perovskite active layer comprises a perovskite structure substance and alkali metal fluorate. The perovskite active layer in the perovskite solar cell is doped with alkali metal fluorate, so that directional growth of perovskite grains can be effectively promoted, grain boundary defects of the perovskite active layer are reduced, bulk phase defects are passivated, non-radiative recombination of the perovskite active layer is reduced, and the photoelectric conversion efficiency of the perovskite solar cell is obviously improved. And moreover, a lattice structure can be effectively strengthened, material decomposition is inhibited, lattice vacancies are filled, external erosion is blocked, and ion migration is inhibited, so that the long-term stability of the perovskite solar cell is obviously improved. The laminated solar cell, the cell assembly and the electric device all comprise perovskite solar cells.

The invention provides a pre-lithiated silicon oxide composite material as well as a preparation method and application thereof, belongs to the technical field of lithium ion batteries, and is used for solving the technical problems of poor initial coulombic efficiency and stability of pre-lithiated silicon monoxide. The preparation method comprises the following steps: carrying out disproportionation reaction on silicon oxide at high temperature; and cooling to a relatively low temperature, introducing inert gas and carbon source mixed gas, and carrying out carbon coating through a chemical vapor deposition technology to form the SiOx / Si-C composite material. And mixing the treated silicon oxide with a lithium supplement agent, heating in an inert gas environment to pre-lithium, and washing and drying the product to prepare the high-performance silicon-oxygen composite material. According to the invention, the initial coulombic efficiency of the lithium ion battery is remarkably improved, and a more stable carbon-coated structure is formed, so that the capacity retention ratio and the cycling stability of the battery are enhanced. In addition, the technology has lower preparation cost, and is suitable for wide application in the battery manufacturing industry.

The invention provides a titanium dioxide-graphene composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing a certain amount of graphene oxide in an organic solvent to obtain a graphene oxide solution; adding butyl titanate into the graphene oxide solution, and stirring and mixing to obtain a first mixed solution; uniformly mixing a certain amount of nonionic surfactant with water to obtain a second mixed solution; gradually adding the second mixed solution into the first mixed solution, and uniformly stirring to obtain a third mixed solution; and carrying out hydrothermal treatment on the third mixed solution at a predetermined temperature for a predetermined time, cooling, filtering and drying to obtain the titanium dioxide-graphene composite material. According to the method, the preparation efficiency is high, and the photocatalytic performance of the titanium dioxide-graphene composite material is improved.

The utility model discloses an upper driving wire coiling device, and relates to the technical field of wire coiling, the upper driving wire coiling device comprises a device vertical frame, a coiling shaft assembly, a coiling shaft driving assembly and a solid solution water tank, the coiling shaft assembly is rotatably arranged on the device vertical frame in the longitudinal direction, and a plurality of coiling vertical rods distributed in the circumferential direction are arranged on one side of the bottom end of the coiling shaft assembly; the coiling shaft driving assembly is in transmission connection with one side of the top end of the coiling shaft so as to drive the coiling shaft assembly to rotate; and the solid solution water tank is driven by a telescopic piece to enter and exit from the lower part of the reel shaft assembly. By means of the method, solid solution can be conducted in time after the aluminum alloy wire is coiled, material grains are prevented from becoming large, subsequent additional solid solution pools can be reduced, and meanwhile the preorder rolling temperature is easier to control.

The present invention relates to an ebullated bed hydrogenation catalyst and a preparation method thereof, wherein the steps include preparing alumina, aluminum hydroxide, alkaline auxiliary agent and deionized water into a suspension, grinding with liquid, hydrothermal reaction, washing and filtering to obtain a wet filter cake A; taking the obtained wet filter cake A, adding deionized water, a peptizing agent solution and a dispersant solution to prepare a sol B with a certain content of aluminum oxide; injecting the sol B into a column containing an upper layer of oil and a lower layer of an alkaline solution to form the sol B, drying and roasting the formed product to obtain a product spherical carrier C; impregnating the carrier with an active metal component, and then directly placing it in a roasting furnace for roasting to obtain the ebullated bed hydrogenation catalyst of the present invention. The catalyst has the characteristics of suitable particle size, uniform particles, excellent performance, high strength and low abrasion.

The invention discloses a gradient ultra-low resistivity electrode steel and a manufacturing method thereof. The mass percentage of chemical components is as follows: C: 0.001-0.003%, Si: 0.0005-0.001%, Mn: 0.008-0.01%, P≤0.006%, S≤0.002%, O: 0.002-0.003%, Cu: 4.3-5.2%, and the rest is Fe and impurity elements. The manufacturing method comprises the steps of molten iron desulfurization, converter smelting, LF furnace refining, RH vacuum treatment, continuous casting, heating, rolling and cooling. The low resistivity of the electrode steel is further reduced by component design, and the resistivity of the electrode steel is made into a gradient distribution by a preparation process, the central resistivity is low, the surface resistivity is high, the current passes through the central part of the flat steel, and the power consumption in the aluminum electrolysis process is reduced.

The invention relates to a method for manufacturing a polycrystalline silicon resistor with U-shaped resistivity temperature characteristics, which comprises the following steps of: 1, depositing a polycrystalline silicon thin film (3) on a silicon oxide layer of a silicon substrate (1) by adopting an LPCVD (Low Pressure Chemical Vapor Deposition) process, 2, depositing a TEOS (Tetraethyl Orthosilicate) dielectric layer (4) on the polycrystalline silicon thin film (3), and carrying out RTA (Rapid Thermal Annealing); recrystallizing the polycrystalline silicon by adopting furnace tube process high-temperature annealing; 3, photoetching and injecting boron impurities to form a P-type polycrystalline silicon resistor (3-1); 4, photoetching a P-type polycrystalline silicon resistor pattern (3-1); and 5, depositing a dielectric layer (7) on the silicon oxide layer and the P-type polycrystalline silicon resistor. According to the polycrystalline silicon resistor prepared by the invention, the resistivity has a U-shaped characteristic along with the change of the temperature in the temperature range of-55 DEG C to + 125 DEG C, the transition temperature is about room temperature 25 DEG C, and the resistivity temperature coefficient in the temperature range of-55 DEG C to + 125 DEG C is 3.18 ppm / DEG C and is close to 0ppm / DEG C.

The utility model belongs to the technical field and discloses an electrolyte-resistant composite aluminum foil, a current collector and a battery. The electrolyte-resistant composite aluminum foil comprises a flexible base material, a plurality of conductive layers are symmetrically arranged on the upper side and the lower side of the flexible base material, and a barrier layer is arranged between every two adjacent conductive layers. A plurality of conducting layers are symmetrically arranged on the upper side and the lower side of a flexible base material, and a blocking layer is arranged between every two adjacent conducting layers; the barrier layer can break grain growth, reduce stress concentration and defects, increase the compactness of the film layer, improve the overall weather resistance of the film layer, prolong the service life of the composite aluminum foil, and indirectly prolong the cycle life of the battery.

The invention discloses a silicon-aluminum material and a preparation method thereof. After being roasted at 500-700 DEG C, the silicon-aluminum material has the following properties: the content of silicon dioxide is 20-75wt%, and the pore volume is 0.70-1.5 mL / g; and the specific surface area is 280-400 m < 2 > / g. The preparation method of the silicon-aluminum material comprises the following steps: (1) uniformly mixing a silicon-containing compound A, an auxiliary agent A, an aluminum-containing compound and water to obtain a material flow A; (2) carrying out heat treatment on the material flow A in the presence of organic amine to obtain a material flow B; (3) uniformly mixing a silicon-containing compound B, an acidic aluminum-containing compound, an alkaline aluminum-containing compound and water, and treating to obtain a material flow C; (4) mixing the material flow C with an auxiliary agent B to obtain a material flow D; and (5) mixing the material flow B and the material flow D, carrying out hydrothermal treatment, and then washing, drying and roasting to obtain the silicon-aluminum material. The provided silicon-aluminum material shows certain molecular sieve characteristics, has the characteristics of high B acid content and stepped pore channel distribution, and is especially suitable for being used as a carrier of a hydrogenation catalyst.

The invention relates to the technical field of duplex stainless steel bar forging, in particular to a forging process of a super duplex stainless steel S32760 large-wall-thickness bar, which comprises the following steps: S1, collecting data and constructing a forging simulation model: collecting previous forging data, and constructing the forging simulation model through a finite element technology; s2, proper materials are selected to be made into steel billets, specifically, the materials are selected according to the machining requirement of a to-be-forged bar, and the materials are melted; through anvil block preheating and temperature control in each step in the forging process, the internal and external temperature difference of the forge piece is delayed, the cracking tendency of the forge piece is reduced, and no obvious forging crack is generated on the surface; the final forging temperature is guaranteed to be larger than or equal to 950 DEG C, the forging ratio is increased, grains are refined, and UT detection is free of defects; in addition, the transfer speed during quenching is controlled, and no sigma brittle phase is generated in the structure. The S32760 round bar with the diameter of 260 circles produced by the process has no cracking phenomenon, the T / 4 and T / 2 transverse and longitudinal low-temperature impact of the forged piece subjected to heat treatment exceeds 100J, and the transverse spot corrosion performance is qualified.

The present invention discloses a precision cutting and forging process suitable for large pitch track segments. First, the steel billet is obtained by smelting and continuous casting according to a specific chemical composition; then, it is hot-rolled into round steel, cut into sections, heated, flattened, pre-forged, final forged, and precision-cut to obtain a track segment blank; finally, it is solution treated under pulse electric field conditions, water quenched, oil cooled, aged, quenched with quenching liquid, tempered, and air-cooled under pulse magnetic field conditions. The present invention screens and obtains a specific chemical composition, and combines it with a corresponding heat treatment process to greatly improve product performance. The process of the present invention is suitable for the processing of track segments with a pitch of more than 200 mm, and the track segments have excellent performance.

The invention discloses a method for achieving additive manufacturing high-temperature alloy grain supernormal coarsening based on seed crystal guided directional recrystallization heat treatment, and relates to a coarsening method for additive manufacturing high-temperature alloy grains. The invention aims to solve the technical problem of insufficient high-temperature creep property caused by small grain size of the existing additive manufacturing nickel-based high-temperature alloy. According to the method, the single crystal layer with target orientation, namely the seed crystal, is prepared in the additive manufacturing stage, then the grain boundary of the seed crystal is continuously heated through the electromagnetic induction coil in the subsequent heat treatment, forced recrystallization is carried out by taking the seed crystal as a unique or absolute dominant growth source, namely oriented recrystallization is carried out, so that the growth of other crystal grains is inhibited, and the yield of the product is improved. And finally, an ultra-large grain structure with the seed crystal as the main source is obtained in the additive component, the average grain length of the ultra-large grain structure can be increased by two or more orders of magnitude compared with the original additive state and reaches the millimeter level or even the centimeter level, and the crystal orientation is highly consistent with the preset seed crystal orientation.

The invention discloses steel for a 3C product shell and a manufacturing method of the steel, belongs to the technical field of steel, and solves the problems that the comprehensive performance of the steel is ensured to meet the application requirements and the use performance of the steel is prevented from being influenced due to increase of brittleness through fine material design and processing technology control while the magnetic conductivity of the steel is improved. Comprising the following formula: less than 0.008% of C, less than 0.03% of Si, less than 0.3% of Mn, 0.015-0.1% of T , 0.01-0.08% of A < l > and the balance of Fe, and also possibly contains trace unavoidable impurities. The steel strip is annealed at low temperature under high pressure, when a steel coil is annealed at high pressure, the grain recovery potential energy is large, the grains can grow up rapidly, the magnetic conductivity of the product is ensured by the large grains, the surface hardness of the product is ensured by low-temperature annealing and large smooth extension, and the product is ensured to be free of timeliness and high in magnetic conductivity after the steel strip with the formula is rolled and annealed. Meanwhile, the product hardness, the stamping performance and the surface electroplating effect are considered.

The invention provides an ultrahigh heat conduction and corrosion resistance magnesium alloy and a preparation method thereof. The ultrahigh heat conduction and corrosion resistance magnesium alloy is an Mg-Zn-Ca-RE alloy system. Wherein RE is a rare earth element, the content of RE is 0.3-0.5 wt.%, the content of Zn is 4.5-5.5 wt.%, the content of Ca is 0.05-0.1 wt.%, and the balance is Mg and unremovable impurities. RE is at least one of La, Ce and Sm. According to the preparation principle, smelting, semi-continuous casting, annealing, extrusion cogging and graded rolling treatment are carried out, and the ultrahigh-heat-conduction corrosion-resistant magnesium alloy with high strength, high heat conduction performance and excellent corrosion resistance can be obtained.

The present invention relates to a perovskite solar cell regulated by crystallization and a preparation method thereof, the method comprising: drying a clean conductive base layer with nitrogen and performing ultraviolet-ozone treatment; preparing an electron conduction layer on the conductive base layer; preparing a prolineamide-doped perovskite light-absorbing layer on the electron conduction layer; preparing a proline modified layer on the perovskite light-absorbing layer; preparing a hole conduction layer on the proline modified layer; and sputtering a metal electrode on the hole conduction layer using a magnetron sputtering instrument or an evaporation evaporation method to prepare a metal electrode layer. It can effectively reduce the contact between the electron conduction layer and the hole conduction layer, reduce leakage current, improve photoelectric conversion efficiency, and is conducive to blocking the infiltration of oxygen and improving the stability of the perovskite material.

The invention discloses a high-strength light-weight aluminum alloy and a preparation method thereof, and belongs to the technical field of aluminum alloy preparation. The high-strength light-weight aluminum alloy is composed of, by weight, 80-90 parts of composite alloy, 11-15 parts of composite organic refiner and 23-28 parts of organic coating, the composite organic refiner is prepared from graphite powder, potassium permanganate, hexadecyl ammonium bromide, 2-aminoterephthalic acid and tetrabutyl titanate, and the organic coating is prepared from 4, 4 '-dihydroxy-4, 4'-dihydroxy-4, 4 '-dihydroxy-4, 4'-dihydroxy-4, 4 '-dihydroxy-4, 4'-dihydroxy-4, 4 '-dihydroxy-4, 4'-dihydroxy-4, 4 '-dihydroxy-4, 4'- The aluminum alloy is prepared from 4, 4 '-(acetylene-1, 2-diyl) diphthalic anhydride, 4, 4'-(4, 4 '-diaminodiphenyl ether, 4, 4'-(acetylene-1, 2-diyl) diphthalic anhydride, 4, 4 '-oxybisphphthalic anhydride, 3, 4'-diaminodiphenyl ether and 3-aminophenylacetylene, and the aluminum alloy prepared through the method has excellent strength and light weight.

The invention discloses a magnetic field assisted surface laser shock strengthening hard alloy device and method, the device comprises a laser galvanometer, a container and a magnetic field generator, a hard alloy sample to be processed is placed in the container, deionized water covers the hard alloy sample to be processed in the container, and the magnetic field generator comprises two Helmholtz coils; a uniform magnetic field is formed between the two Helmholtz coils, the container is arranged between the two Helmholtz coils, the laser galvanometer is aligned with a hard alloy sample to be processed, and the laser galvanometer can generate an infrared laser beam to perform laser shock peening on the hard alloy sample to be processed. According to the method, the alternating magnetic field is applied to the surface of the workpiece through the electromagnetic field, migration of the Co phase is accurately regulated and controlled, distribution of the ceramic phase and the metal phase is improved, and active regulation and control of the surface microstructure are achieved. And surface oxide layer refining grains are removed through alternating magnetic field assisted laser shock peening, a gradient structure is generated on the surface layer, and the mechanical property of the hard alloy is effectively improved.

The embodiment of the invention provides a perovskite precursor solution. The perovskite precursor solution comprises a perovskite material, an organic additive and an organic solvent, wherein the organic additive comprises one or two of trifluoromethyl aromatic carboxylic acid and trifluoromethyl sulfo aromatic carboxylic acid. According to the technical scheme, the perovskite precursor solution can significantly improve the stability of a perovskite light absorption layer in a humid environment and prolong the service life of a device; and the nucleation rate and the growth process of the crystal can be adjusted, the increase of perovskite crystal grains is promoted, the grain boundary defects are reduced, the carrier recombination is reduced, and the photoelectric conversion efficiency is improved.

The invention relates to a precision strip for a lithium battery explosion-proof sheet and a processing technology of the precision strip. The processing technology comprises the following steps: S1, raw material blooming; s2, recrystallizing and annealing the intermediate blank; s3, finish rolling of a finished product; and S4, recrystallizing and annealing a finished product. The raw material steel belt is made of stainless steel, so that the explosion-proof sheet manufactured subsequently has excellent corrosion resistance and high temperature resistance, in finish rolling of a finished product, the last two passes of rolling are rolled through a special point-shaped working roller with the surface roughness Ra being 1.0-1.5 microns, the surface roughness Ra of the steel belt reaches 0.5-0.7 microns, the scratch resistance of the explosion-proof sheet can be remarkably improved, and the service life of the explosion-proof sheet is prolonged. After recrystallization annealing of a finished product is completed, the finished product steel belt obtains low-hardness and ultra-large grains, the average grain size is smaller than or equal to 6 grades, the requirement of the anti-explosion piece for the residual thickness of the anti-explosion scribed line can be met, the residual thickness is stably larger than 0.05 mm, and the safety performance of the battery is guaranteed.

The invention relates to a corrosion-resistant magnetically soft alloy, in particular to a high-chromium high-plasticity corrosion-resistant magnetically soft alloy and a preparation method of a bar of the high-chromium high-plasticity corrosion-resistant magnetically soft alloy. Comprising the following steps: proportioning: weighing 2.2-2.8% by weight of silicon and 0.3-0.6% by weight of manganese as alloying raw materials; the method comprises the following steps: weighing 0.005 to 0.008 percent of carbon and 0.8 to 1.2 percent of aluminum as a deoxidizing and desulfurizing agent; 19.0-21.0% of chromium and the balance iron are weighed to serve as smelting raw materials; and vacuum melting, molten steel deoxidation, desulfurization and alloying, primary forging, secondary forging and heat treatment are conducted, and the high-chromium high-plasticity corrosion-resistant magnetically soft alloy bar is manufactured after heat treatment is completed. By increasing the content of chromium in the corrosion-resistant magnetically soft alloy and introducing the aluminum element, the corrosion resistance, plasticity, resistivity and magnetic performance of the corrosion-resistant magnetically soft alloy are improved.

The invention provides a method for preparing a thin-film solar cell from cadmium sulfide based on a post-selenylation and hydrothermal deposition method. The morphology of the cadmium sulfide thin film can be improved by preparing cadmium sulfide through the hydrothermal deposition method, and the cadmium sulfide thin film prepared through the hydrothermal deposition method is compact in morphology, clean and transparent. The crystallinity of the selenium antimony sulfide thin film subjected to post-selenylation is improved, and defects are reduced. The thin-film solar cell comprises a conductive substrate (including FTO and the like), an electron transport layer (CdS), a selenium antimony sulfide (Sb2 (S, Se) 3 for short) absorption layer, a hole transport layer and a metal counter electrode. The morphology of the cadmium sulfide thin film is improved, the morphology is improved through the selenium selenide antimony sulfide thin film, the energy level orientation is good, the deep energy level defect is reduced, and the efficiency of the thin film solar cell can be improved.

The invention relates to a dispersion sigma phase-containing enhanced multi-principal-element alloy and a preparation method thereof, the general formula of chemical components is AlaNibCocCrd according to atomic percent, a is equal to 15, b is greater than or equal to 47 and less than 49, c is greater than 18 and less than or equal to 19, d is greater than 18 and less than or equal to 19, and a + b + c + d is equal to 100. The method has the advantages that the dispersed sigma phase reinforced multi-principal-element alloy is obtained by adopting the proportion of four components of Al, Ni, Co and Cr through alloy burdening and smelting, homogenization treatment, cold rolling deformation, recrystallization heat treatment and aging heat treatment, the Al element is added into a NiCoCr matrix of the alloy, and a double-phase structure of an FCC matrix and a small volume fraction of a BCC phase is obtained.

The invention relates to the technical field of photovoltaics, and discloses a perovskite precursor solution based on an aspartame passivator, and a preparation method and application thereof. The perovskite precursor solution comprises a perovskite component, a solvent and a passivator, the passivator is sodium cyclohexane sulfamate, the chemical formula of the perovskite is Csx (FAyMA1-y) 1-xPb (IzBr1-z) 3, x is greater than or equal to 0 and less than or equal to 1, y is greater than or equal to 0 and less than or equal to 1, and z is greater than or equal to 0 and less than or equal to 1. The invention also provides a method for preparing a perovskite thin film by using the solution, and the thin film is applied to a trans-structured perovskite solar module. The assembly comprises a transparent conductive substrate, and a hole transport layer, the perovskite thin film, an electron transport layer, a hole blocking layer and a metal electrode which are stacked on the transparent conductive substrate in sequence.

The invention discloses a high-activity single-atom catalyst for synthesizing bio-based cyclohexanediol monomethyl ether and a preparation method thereof, specifically a high-activity single-atom Ru1 / CeO2-X catalyst for synthesizing bio-based cyclohexanediol monomethyl ether and a preparation method thereof, which not only solves the problem of uneven dispersion of conventional single-atom Ru in the catalyst, but also can achieve complete hydrogenation of lignin-derived phenol in a short time, low pressure and low temperature during the synthesis of bio-based cyclohexanediol monomethyl ether while inhibiting the breakage of ether bonds, thereby improving the selectivity of bio-based cyclohexanediol monomethyl ether (>95%).