11results about How to "Large grain" patented technology

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 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 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 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 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 relates to a titanium-containing hot-dip aluminum-zinc alloy coating, a steel plate and a preparation method of the titanium-containing hot-dip aluminum-zinc alloy coating, and the alloy coating comprises the following chemical components in percentage by weight: 55.0% of Al, 1.6% of Si, 0.010%-0.050% of Ti and the balance of Zn. The alloy coating steel plate comprises a steel substrate and a titanium-containing hot-dip alloy coating attached to the surface of the steel substrate. The preparation method comprises the following steps: S1, preparing a plating solution; s2, pretreatment of the steel matrix; s3, carrying out a hot dipping process; s4, carrying out post-treatment; the method has the beneficial effects that the content of Ti in the plating solution is accurately regulated and controlled, hot dipping technological parameter optimization is combined, uniform refining of a plating layer structure is achieved, heterogeneous nucleation of Al-rich phase dendritic crystals can be efficiently promoted, the spangle size is reduced to be within 200 micrometers from 800 micrometers, meanwhile, the side effect that zinc slag is increased due to excessive Ti is avoided, the hardness of the refined plating layer is improved by 30%-50%, grain boundary distribution is uniform, and the plating layer has the good corrosion resistance. The performance is obviously improved.

The invention discloses a perovskite solar cell based on a 4, 6-dichloro-1, 3, 5-triazine-2-amine additive and a preparation method of the perovskite solar cell, and belongs to the technical field of novel photovoltaic materials and devices. According to the invention, a multifunctional additive 4, 6-dichloro-1, 3, 5-triazine-2-amine with a unique molecular structure is introduced into a perovskite precursor solution, so that the perovskite solar cell with high performance and high stability is prepared. According to the present invention, the 1, 4, 6-dichloro-1, 3, 5-triazine-2-amine additive simultaneously achieves the comprehensive passivation of defects and the optimization of the crystallization process on the single molecule level through the synergistic effect of the three functional groups such as the triazine ring, the amino group and the chlorine atom, and the effect cannot be achieved by the existing single-function additive; the open-circuit voltage (Voc) and the fill factor (FF) of the prepared perovskite solar cell are remarkably improved, and higher photoelectric conversion efficiency is obtained. Meanwhile, the long-term stability (including maximum power point tracking stability and 85 DEG C thermal stability) of the device is improved by several times.

This invention relates to the field of perovskite solar cells, specifically a method for preparing high-purity formamidinium hydroiodate, comprising the following steps: dissolving formamidinium acetate in hydroiodic acid solution and stirring to obtain a precursor solution of formamidinium hydroiodate; heating the solution in an oil bath to obtain a crude product of formamidinium hydroiodate; cooling the product and adding an ethanol solution, then heating again until completely dissolved to obtain a hot saturated solution; removing the hot solution and vacuum filtering, and pouring the resulting mother liquor into a crystallizing dish for crystallization; after crystallization, adding diethyl ether for washing; placing the washed flaky crystals in an oil bath and adding ethanol again for heating to dissolve, then filtering, and pouring the resulting mother liquor back into a crystallizing dish for low-temperature crystallization; repeating the above steps three times; and vacuum drying the obtained product to obtain formamidinium hydroiodate, which is the target product. The formamidinium hydroiodate of this invention, when applied to a perovskite layer, can greatly improve the photovoltaic performance of perovskite solar cells and significantly improve the stability of the device.

This invention discloses the application of aspartic protease 1 and its encoding gene in regulating wheat photosynthesis, yield, and protein content. Analysis of wheat mutants with APP1 gene mutations revealed that, compared to wild-type wheat, the APP1 mutant exhibited enhanced photosynthesis, larger grains, increased grain weight, and higher protein content. Conversely, overexpression of APP-A1 in wild-type wheat accelerated leaf senescence and corrected the mutant phenotype. Furthermore, this invention identified a SNP site in the APP-A1 gene associated with photosynthesis and grain development in natural wheat populations, and natural variations in the APP-A1 gene can promote photosynthesis and grain development. These results demonstrate that APP1 plays a negative regulatory role in wheat photosynthesis, yield, and protein content. This invention is of significant importance for the breeding and screening of wheat varieties with enhanced photosynthesis, high yield, and high protein content.

The invention belongs to the technical field of perovskite solar cells, and provides a perovskite thin film based on a volatile additive and a preparation method and application thereof. According to the perovskite thin film provided by the invention, the perovskite matrix and the volatile additive are used as main raw material components, and the volatile additive comprises at least one of a beta-diketone compound, a carboxylic acid compound, an amide compound and a nitrogen-containing heterocyclic compound. The volatile additive promotes crystallization of perovskite in a large-grain and highly preferred orientation mode, crystal growth can be effectively regulated and controlled in the annealing process, bulk phase or surface defect passivation is achieved, interface performance is optimized, and finally the high-quality perovskite thin film with larger grain size and remarkably reduced grain boundaries is successfully prepared. And the volatile additive does not remain in the film after volatilization. The perovskite thin film provided by the invention can be used for preparing a perovskite solar cell device.

The invention provides a perovskite solar cell, and relates to the technical field of solar cells. The transparent conducting layer is arranged on the glass substrate in the first direction; the hole transport material layer is arranged on the side, away from the glass substrate, of the transparent conducting layer in the first direction, the molecular structure of the hole transport material layer comprises a triarylamine core, each aryl group is 3, 4, 5-trimethoxyphenyl, and nitrogen atoms are substituted by-(CH2) 4-PO (OH) 2 groups; the perovskite layer is arranged on the side, away from the glass substrate, of the hole transport material layer in the first direction; the electron transport layer is arranged on one side, far away from the glass substrate, of the perovskite layer along the first direction; the buffer layer is arranged on the side, away from the glass substrate, of the electron transfer layer in the first direction; the metal electrode is arranged on the side, away from the glass substrate, of the buffer layer in the first direction; the antireflection layer is arranged on the side, away from the glass substrate, of the metal electrode in the first direction. The invention also provides a preparation method of the perovskite solar cell.