134results about How to "Few grain boundaries" patented technology

The invention relates to the technical field of polysilicon ingot furnace designing and manufacturing, and aims to provide a follow-up heat insulation ring thermal field structure for the vertical oriented growth of polysilicon. The thermal field structure comprises a furnace chamber with a side surface enclosed heat insulation cage body, a crucible and a thermal field are arranged in the heat insulation cage body, and the upper end of the heat insulation cage body is connected with a lifting device; the upper part and the lower part of the heat insulation cage body are respectively provided with a top heat insulation board and a lower heat insulation body, wherein the top heat insulation board is fixedly suspended on an electrode, the lower heat insulation board and a heat exchange are fixed on a support column, the top heat insulation board and the upper end of the heat insulation cage body are movably connected, and the lower heat insulation board and the lower end of the heat insulation cage body are movably connected; and a circular follow-up heat insulation ring is fixed in the heat insulation cage body through a plurality of connecting devices. The follow-up heat insulation ring thermal field structure for the vertical oriented growth of polysilicon has reasonable design, can increase the grain size of polysilicon, reduce grain boundary and improve the verticality of the growing direction of polysilicon so as to improve the quality of polysilicon ingots, and simultaneously the follow-up heat insulation ring also plays the role of energy consumption reduction.

The invention discloses a method for using a chemical vapor deposition method to prepare a perovskite film solar cell. The method comprises the following steps of: (1) pre-processing a substrate; (2) coating a TiO2 compact layer on the surface of the substrate after the pre-processing; (3) using a one-step method to prepare a perovskite material layer; (4) carrying out spin coating on the perovskite material layer so as to prepare a Spiro-OMeTAD solar cell cavity transmission layer; and (5) drying a device prepared by the steps (1)-(4), completing cathode metal electrode deposition, and obtaining the perovskite film solar cell. According to the invention, a simple gas phase transmission method is utilized, the simple one-step chemical vapor deposition (CVD) method is developed, the halide perovskite solar cell is prepared without depending on high vacuum equipment, and the energy conversion efficiency exceeds 11%.

The invention provides a linear porous titanium dioxide material and a preparation method and application thereof. The linear porous titanium dioxide material is of an anatase-phase structure and a monocrystalline structure, and structurally consists of a plurality of particles; each particle has the fixed growth direction. The invention also provides the preparation method and application of thelinear porous titanium dioxide material. The titanium dioxide porous nanometer line has the advantages that the long axis of the structure is suitable for the effective transfer of electrons, so as tofacilitate the hydrogenation by photolysis of water, or degradation of organic pollutants by photocatalysis; the porous structure is suitable for the quick embedding-in and embedding-out process of lithium ions, sodium ions or potassium ions; the large specific surface area is suitable for the contact area between an electrolyte and an electrode, so that the current density is reduced, and the better battery quick charge and discharge property is realized.

The invention discloses a high-performance perovskite solar cell which comprises a substrate, an electronic transmission layer, an interface modification layer, a perovskite absorption layer, a hole transport layer and an counter electrode, wherein the interface modification layer is made of the modification material of cesium salt; and the perovskite light absorption layer is prepared by a gas phase auxiliary solution method. The invention also discloses a preparation method for the high-performance perovskite solar cell. The solar cell has the advantages that photoelectric conversion efficiency is high; stability is high; the preparation method is simple; cost is low; and large-scale production can be carried out.

The invention provides a method for preparing a molybdenum disulfide film with consistent grain orientation height on a sapphire substrate. The method comprises the following steps of: adopting c-plane sapphire as the substrate, and carrying out high-temperature annealing treatment on the substrate before growth; putting the sapphire substrate into a first quartz boat, mixing and grinding MoO3 and NaCl, weighing a mixture and putting the mixture into a second quartz boat, and putting S powder into a third quartz boat; and putting the three quartz boats into a chemical vapor deposition system cavity, introducing carrier gas, controlling the temperature in the cavity and carrying out a chemical vapor deposition process, and thus obtaining the molybdenum disulfide film with the consistent grain orientation height on the sapphire substrate. The method solves the problem of random grain orientation of molybdenum disulfide prepared by a chemical vapor deposition method, realizes preparation of the molybdenum disulfide film with the consistent grain orientation height, has the advantages of simple process, low cost and the like, and is suitable for industrial batch production.

The invention discloses a molybdenum carbide modified tubular carbon nitride photocatalytic material and a preparation method and application thereof. The molybdenum carbide modified tubular carbon nitride photocatalytic material comprises molybdenum carbide and tubular carbon nitride, wherein the surface of the tubular carbon nitride is modified with the molybdenum carbide. The preparation methodcomprises the steps: suspending the tubular carbon nitride in methanol, so as to obtain a suspension; dispersing the molybdenum carbide in the suspension, carrying out intensive mixing, and carryingout drying, thereby obtaining the molybdenum carbide modified tubular carbon nitride photocatalytic material. According to the molybdenum carbide modified tubular carbon nitride photocatalytic material disclosed by the invention, an energy band structure of the carbon nitride is improved to form molybdenum carbide / carbon nitride heterojunction, so that the effective separation of photoproduction electron-hole pairs is achieved, the utilization efficiency of photoproduction electron-holes is increased, and the effect of photocatalytic degradation is promoted; the molybdenum carbide modified tubular carbon nitride photocatalytic material can be applied to degradation of antibiotics or dyes in wastewater.

The invention discloses a preparation method of a perovskite thin film and a preparation method of a solar cell thereof. Includes depositing BX2 in perovskite ABX3 raw material on substrate by vacuumthermal evaporation, and forming BX2 thin film on substrate; Flashing the AX salt in the perovskite ABX3 raw material on the BX2 film to obtain a perovskite film covered with excessive AX salt on thesurface; The excess AX salt was washed to give a thickness of 80- 500nm perovskite film. BX2 is evaporate first, Then the excess AX is flashed, and finally the excess AX is washed away to obtain uniform and compact perovskite thin film. The method makes the preparation of perovskite thin film layer more controllable, simple in operation and good in repeatability, solves the problem of complex control of ABX3 vapor deposition in the prior art, thereby facilitating the large-scale production of perovskite thin film.

The present invention provides a positive electrode material precursor which is a core-shell structure. The material chemical formula of the core is Ni1-x-yCoxAly(OH)2. The material chemical formula of the shell is Ni1-r-s-tCorAlsMntCO3, wherein 1-x-y is a value in a range of 0.80 to 0.96, x is greater than 0, y is a value in a range of 0.01 to 0.10, 1-r-s-t is a value in a range of 0.34 to 0.70,r is greater than 0, s is a value in a range of 0.20 to 0.40, and t is a value in a range of 0.20 to 0.40. The positive electrode material of the invention is stable in structure, high in safety performance, long in cycle life and good in thermal stability.

The invention relates to the technical field of lithium ion battery materials, in particular to a ternary precursor and a preparation method and application thereof. The ternary precursor is of a core-shell structure, the inner core is of a loose and porous compact orange slice type structure, the shell is of a center epitaxial amplification shape, and the fan-shaped central angle of the orange slice type structure is 10-30 degrees; the core of the obtained ternary precursor particle has a loose and porous structure, so that the internal stress is reduced in the charging and discharging process of a lithium battery, and microcracks of the particle are avoided; the shell is compact and is of an orange slice structure, lithium salt can permeate into the core of the ternary precursor more easily in the sintering process of preparing the positive electrode material, the diffusion mass transfer resistance is smaller, the sintering temperature is lower, the dynamic performance is better, and use is more facilitated; the material is large in tap density, good in sphericity degree, uniform in primary particle distribution and narrow in particle size distribution, and a good premise and foundation are provided for subsequent preparation of high-quality positive electrode materials.

The invention discloses a display panel and a manufacturing method thereof. The manufacturing method of the display panel comprises the following steps: forming a non-crystalline silicon film on a substrate, wherein the non-crystalline silicon film comprises at least two non-crystalline silicon layers, and the crystalline grain densities of the two adjacent non-crystalline silicon layers are different; and converting the non-crystalline silicon film into a polycrystalline film. The polycrystalline film with lager crystalline grains and fewer grain boundaries is obtained in the manufacturing method, so that the carrier mobility of the polycrystalline film is higher, and the performance of the corresponding display panel is better.

The invention discloses a perovskite solar cell. The structure of the perovskite solar cell comprises glass, a positive electrode ITO, a positive electrode modification layer nickel oxide, an active layer FAPb<0.75>Sn<0.25>I<3>, a first negative electrode modification layer PC60BM, a second negative electrode modification layer BCP and negative electrode silver from bottom to top. The grain of perovskite on the nickel oxide is larger than that of traditional PEDOT:PSS, the charge mobility is higher, higher short-circuit current and external quantum efficiency can be generated, and larger photoelectric conversion efficiency is further obtained.

The invention relates to the field of solar cells, specifically, relates to an inorganic perovskite solar cell based on an ordered SnO2 nanorod array and a preparation method of inorganic perovskite solar cell. The inorganic perovskite solar cell comprises a conductive substrate, a SnO2 seed crystal layer deposited on the surface of the conductive substrate, a SnO2 seed crystal layer, a SnO2 nanorod array growing on the surface of the SnO2 seed crystal layer, an inorganic perovskite layer deposited in gaps of SnO2 nanorods and on the surfaces of the SnO2 nanorods, a hole transport layer deposited on the surface of the inorganic perovskite layer, and an Au electrode layer deposited on the surface of the hole transport layer. The inorganic perovskite solar cell provided by the invention hasthe advantages of fast charge transmission, high charge extraction efficiency, high photoelectric conversion efficiency, good device stability and the like. The preparation method is simple and convenient to operate, is low in cost and wide in application range, and the prepared solar cell is stable and efficient.

The invention relates to a lithium battery electrolyte, and especially relates to a dry preparation process of a solid electrolyte. The dry preparation process comprises the following steps: mixing lanthanum oxide, zirconium oxide, a lithium source and a doping raw material, and uniformly grinding to obtain a mixture; presintering the mixture, and cooling to room temperature; carrying out secondary grinding on the pre-sintered mixture to obtain mother powder; tabletting the mother powder to obtain a biscuit; and carrying out secondary sintering on the biscuit to obtain the solid electrolyte. Compared with the prior art, the process has the advantages that the magnesium oxide crucible is adopted for secondary sintering, and short-time sintering is carried out at high temperature, so that the volatilization of lithium in the high-temperature process can be effectively reduced, and the formation of secondary phases such as lanthanum zirconate and the like is avoided. The LLZO prepared by the process has the characteristics of higher density, almost no grain boundary and the like, and almost no lithium oxide is enriched at the grain boundary, so that the LLZO prepared by the process has higher air stability.

The invention provides a linear porous lithium titanate material and preparation and product thereof. The linear porous lithium titanate material is characterized in that the crystal phase is spinel lithium titanate; the lithium titanate material is of a linear structure; the length to diameter ratio of the linear structure is greater than 10; the linear lithium titanate material is of a porous structure; the structure of the linear porous lithium titanate material consists of a plurality of particles; each particle has the fixed growth direction. The linear porous lithium titanate material has the advantages that the long axis of the structure is suitable for the effective transfer of electrons; the porous structure is suitable for the quick embedding-in and embedding-out process of lithium ions, sodium ions or potassium ions; the large specific surface area is suitable for the contact area between an electrolyte and an electrode, so that the current density is reduced, and the betterbattery quick charge and discharge property is realized.

Provided is a manufacturing method for a composite member in which an aluminum die-cast member and a polymer member are strongly bonded as a result of removing a carbide film from the surface of the aluminum die-cast member to produce a homogenized superficial layer. The manufacturing method for a composite member obtained by complexing an aluminum die-cast member and a polymer member, comprises:a melting step for irradiating, with laser light, a joining surface of the aluminum die-cast member to be joined with the polymer member so as to melt a superficial layer of the joining surface; and acomplexing step for integrally molding a polymer material to the joining surface. The manufacturing method for a composite member may include, prior to the melting step, a removal step for removing acarbide film present on the joining surface by irradiating the joining surface with laser light, and may include, after the melting step, a modification step for imparting hydroxyl groups on to the joining surface by irradiating the joining surface with plasma.

The invention discloses a composite ceramic material and a rice cooker liner prepared from the same. The composite ceramic material is prepared from the following raw materials in parts by weight: 50-70 parts of aluminum nitride, 1-2 parts of Y2O3, 2-3 parts of La2O3, 10-15 parts of SiO2, 10-20 parts of B2O3 and 1-1.5 parts of nanometer TiO2. The rice cooker liner is prepared by the following steps: 1) weighing all the raw materials according to the weight in a formula; and 2) uniformly mixing the raw materials by a mixer, filling a model with the mixture, melting the mixture in a high-temperature frit furnace with the temperature of 1400-1500 DEG C, and pouring the mixture into a die for molding to obtain a ceramic liner. By using the composite ceramic material, the heat conductivity of the aluminum nitride ceramic liner can be remarkably improved, and the energy consumption can be greatly reduced.