24results about How to "Promote passivation" patented technology

The invention discloses a TOPCon battery capable of reducing UV attenuation and a preparation method thereof, and belongs to the field of TOPCon batteries, the TOPCon battery comprises a silicon substrate, and three silicon nitride layers / two silicon oxynitride layers / one silicon oxide layer are sequentially deposited on the front surface of the treated silicon substrate to form a front surface antireflection layer; and depositing three silicon nitride layers on the back of the silicon substrate to form a back antireflection layer. The polycrystalline solar cell has the advantages that three silicon nitride layers / two silicon oxynitride layers / one silicon oxide layer are arranged on the front face of the silicon substrate to serve as the front face antireflection layer, the color stability is high, the surface of the silicon substrate can be better passivated, light reflection can be better reduced, the open-circuit voltage and the short-circuit current of the polycrystalline solar cell are improved, and the service life of the polycrystalline solar cell is prolonged. Therefore, the photoelectric conversion efficiency of the polycrystalline solar cell is effectively improved.

The utility model discloses a hybrid passivation back contact cell. The cell comprises a silicon wafer; the heterostructure comprises a first passivation layer which is at least stacked on the first region and a first microcrystalline silicon layer which is fully or partially doped; the first electrode structure is located on the first microcrystalline silicon layer in the heterostructure; the first passivation structure comprises a tunneling oxide layer and a doped polycrystalline silicon layer which are stacked on the second region; the second electrode structure is located on the doped polycrystalline silicon layer in the first passivation structure; the second passivation structure comprises a second passivation layer at least stacked on the first surface and a second microcrystalline silicon layer which is fully or partially doped, the crystallization rate of the second microcrystalline silicon layer is larger than that of the first microcrystalline silicon layer, and the doping type of the second microcrystalline silicon layer is opposite to that of the first microcrystalline silicon layer. According to the utility model, good passivation and tunneling contact performance can be realized, and the electrical performance and the photoelectric conversion efficiency of the cell are significantly improved.

The invention relates to a secondary battery and an electric device. The secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the negative pole piece comprises a negative active layer, the negative active layer comprises a negative active material and a binder, and the binder comprises polytetrafluoroethylene; the electrolyte comprises a solvent and an additive, the solvent comprises carbonic ester and carboxylic ester, and the additive comprises a silane additive. According to the secondary battery disclosed by the invention, the electrolyte is reduced on the surface of the negative pole piece early to form a stable interface protection film, so that the negative active material can be passivated well while the reduction lithium consumption of the negative binder is inhibited, and the first effect and the cycle life of the secondary battery are improved.

The invention belongs to the technical field of solar cells, and particularly relates to a preparation method of an n-TOPCon cell with a thinned back surface. The technical key points are as follows: a laminated structure containing a tunneling oxidation passivation structure is prepared on the back surface by adopting a PECVD (Plasma Enhanced Chemical Vapor Deposition) method, and the laminated structure obtained after annealing is as follows: first SiOx / first poly-Si (n +) / second SiOx / second poly-Si (n +) / PSG; a laser is adopted to act on the PSG in the non-contact area, so that the PSG in the non-contact area is loosened, pores are formed, and loose PSG is formed; alkali washing is adopted, so that the second poly-Si (n +) and the second SiOx in the non-contact area are removed at the same time by alkali liquor through pores of the loose PSG. The purpose of thinning the back surface of the n-TOPCon cell is achieved, poly-Si in a contact area is reserved, the burn-through risk of the cell is reduced, and the cell efficiency is improved.

The invention relates to a secondary battery and an electric device. The secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the negative pole piece comprises a negative active material layer and a solid electrolyte interface film formed on the surface of the negative active material layer, and the solid electrolyte interface film comprises lithium fluoride, fluorine-containing lithium phosphate and a substance containing a fluorocarbon bond; an X-ray photoelectron spectrometer is adopted for testing after the sputtering etching time is 10 minutes, based on the total substance amount of fluorine atoms in a solid electrolyte interfacial film, the molar content of fluorine atoms in lithium fluoride is a, the molar content of fluorine atoms in fluorine-containing lithium phosphate is b, the molar content of fluorine atoms in a substance containing fluorocarbon bonds is c, a + b is larger than or equal to 85% and smaller than or equal to 100%, and c is larger than or equal to 0 and smaller than or equal to 15%; in addition, the negative electrode active material layer further comprises a binder, and the binder comprises polytetrafluoroethylene. The secondary battery of the present application can improve the first efficiency and cycle life.

The invention relates to the field of perovskite solar cell preparation, in particular to a double-passivator perovskite solar cell and a preparation method thereof, and the solar cell adopts a mixture of one or more of phenethyl amine chloride phenethylamine iodine and n-butylammonium iodide and m-fluorophenethylamine iodine as a passivator to passivate a perovskite light absorption layer. According to the invention, through the synergistic passivation of the double passivators of the perovskite light absorption layer, more types of defects can be passivated by using different ions or related groups, so that effective passivation is realized, and the output power of the solar cell is improved. Wherein m-F-PEAI not only can assist other passivators in passivating defects on the surface of the perovskite material, reduce non-radiative recombination and improve the stability of the perovskite material, but also can improve interface contact between the perovskite absorption layer and other functional layers, reduce interface recombination and improve charge transfer efficiency. The problems that an existing single passivator is single in passivation defect type, various defects cannot be effectively passivated, the passivation efficiency is poor, and the battery efficiency is low are solved.

The utility model discloses a back contact cell and a photovoltaic assembly, and the back contact cell comprises a silicon substrate which is provided with a front surface and a back surface which are opposite to each other; the first doped crystalline silicon region and the second doped crystalline silicon region are both arranged on the back surface of the silicon substrate, and a first surface, far away from the silicon substrate, of the first doped crystalline silicon region and a second surface, far away from the silicon substrate, of the second doped crystalline silicon region are both polished surfaces; the isolation groove is used for separating the first doped crystalline silicon region from the second doped crystalline silicon region, the bottom of the isolation groove is provided with a pyramid-like first suede structure, and the distribution density of spire of the pyramid-like structure is 25 / 100 square micrometers to 80 / 100 square micrometers; and the back surface of the silicon substrate comprises overlapping areas corresponding to the first doped crystal silicon area and the second doped crystal silicon area, and the overlapping areas are polished surfaces. In the embodiment of the utility model, the flatness of the first surface and the second surface is high, the surface roughness is low, passivation is facilitated, and the passivation effect of a polished surface is obviously higher than that of a suede surface.

The embodiment of the invention provides a TBC battery and a preparation method thereof, in the embodiment of the invention, not only is a tunneling oxide layer added in an N region for passivation contact and phosphorus doping performed, but also a tunneling oxide layer added in a P region for passivation contact and boron diffusion and laser doping treatment are performed, so that the passivation of the P region is increased, the doping effect of the P region is improved, and the service life of the TBC battery is prolonged. Therefore, the photoelectric conversion efficiency of the cell can be improved, and the open-circuit voltage value of the cell is improved.

The present invention relates to the technical field of environmental heavy metal soil remediation, and specifically to the application of a dual-effect remediation agent based on electrolytic manganese slag in the remediation of heavy metal contaminated soil. The present invention uses electrolytic manganese slag as a base material, mixes it with a calcium-containing material and performs ball milling modification, and utilizes the silicate components and iron and manganese elements therein to passivate the heavy metal ions in the soil, which can not only promote the passivation of heavy metals in the soil, but also increase the content of calcium, sulfur, magnesium, iron, manganese and other medium elements in the soil, and enhance the fertilizer effect of the soil. It only needs to mix the electrolytic manganese slag-based dual-effect remediation agent into the heavy metal contaminated soil without other operations, which has important environmental benefits and social value, and provides certain technical guidance for the resource utilization and harmlessness of electrolytic manganese slag.

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

The present invention discloses a method for repairing soil contaminated by electrolytic manganese slag by inoculating white rot fungi, comprising the following steps: mixing biomass and soil contaminated by electrolytic manganese slag to obtain compost raw materials; inoculating white rot fungi in the compost raw materials to obtain a pile; composting and fermenting the pile to obtain compost mature material, thereby completing the repair of soil contaminated by electrolytic manganese slag. The present invention effectively reduces the leaching amount of heavy metal manganese by inoculating white rot fungi, effectively reduces the mobility and bioavailability of heavy metal manganese, effectively changes the structure of microbial communities, increases the number and diversity of microorganisms, improves the seed germination index, and realizes the repair of soil in contaminated sites. It has the advantages of quickly starting composting repair, effectively reducing the leaching amount of heavy metal manganese, reducing the mobility and bioavailability of heavy metal manganese, increasing microbial diversity and community abundance, and improving the seed germination index.

The embodiment of the invention provides a tunneling silicon oxide selective passivation contact solar cell, a preparation method of the tunneling silicon oxide selective passivation contact solar cell, a photovoltaic module and a photovoltaic system. The solar cell comprises a silicon substrate which comprises a first surface and a second surface which are opposite to each other; the first passivation layer, the first polycrystalline silicon layer and the phosphorus-doped polycrystalline silicon layer are located on the second surface and sequentially stacked in the first direction, and the phosphorus-doped polycrystalline silicon layer is provided with a metallization area and a non-metallization area; the phosphorus-carbon co-doped polycrystalline silicon layer is positioned in the non-metallization region; and the first antireflection layer is positioned on the phosphorus-doped polycrystalline silicon layer and the phosphorus-carbon co-doped polycrystalline silicon layer in the metallization region. According to the embodiment of the invention, by designing a new tunneling oxidation passivation contact structure, the passivation performance of the surface of the silicon wafer can be improved, and the contact resistance caused by C / N doping can be reduced.

The invention discloses a method for electroplating gold on the surface of a beryllium bronze part, which comprises the following steps of: removing oil, pre-corroding, loosening oxide skin, brightening, weakly corroding, cleaning, flash plating copper, nickel-plating, activating, pre-plating gold and plating gold on the surface of the beryllium bronze part to finally obtain the beryllium bronze part with a qualified gold-plated layer.

The present invention discloses a solar cell with a composite dielectric passivation layer structure and a preparation process thereof, wherein a silicon oxide film, an aluminum oxide film, a silicon nitride or a silicon oxynitride film composite dielectric film layer are sequentially deposited on the front, back and peripheral surfaces of a P-type silicon substrate, and a window is opened locally for electrode extraction. The back surface passivation layer of aluminum oxide, silicon dioxide, silicon oxynitride, silicon nitride with different refractive indices and their laminated structures of the present invention greatly reduces the back surface recombination rate, improves the back reflectivity, and simultaneously reduces the component CTM, improves the cell light decay and thermally assisted light decay performance, and anti-PID performance; the structure can be made on boron-doped or gallium-doped P-type monocrystalline silicon, P-type polycrystalline silicon and P-type quasi-monocrystalline silicon substrates, and is compatible with the passivation method based on the composite dielectric film passivation structure for manufacturing PERC cells, double-sided PERC+ cells and shingled PERC cells; the preparation process steps and sequence of the laminated structure, the corresponding preparation method and the process parameter range can well complete the cell production.

The invention relates to a Topcon solar cell and a manufacturing method thereof, belongs to the technical field of solar cells, and solves the problem of low photoelectric conversion efficiency of a Topcon cell in the prior art. The device comprises a silicon wafer, the silicon wafer comprises a front surface and a back surface, the front surface is a boron-diffused silicon wafer surface, and a silicon-aluminum-gallium oxide passivation film layer, a front surface passivation dielectric layer and a first conductive electrode are sequentially arranged from the front surface to the outside; a tunneling oxide layer, a phosphorus-doped silicon layer, a reverse passivation dielectric layer and a second conductive electrode are sequentially arranged from the reverse side to the outside; the chemical composition of the silicon-aluminum-gallium oxide passivation film layer is composed of oxides of silicon, aluminum and gallium, and the molar content ratio of silicon to aluminum to gallium is adjustable. The silicon-aluminum-gallium oxide passivation film layer is adopted to replace an existing aluminum oxide passivation film layer, so that the negative charge density is high, the surface passivation of the silicon wafer is good, and the photoelectric conversion efficiency is improved.

The invention provides a solar cell and a photovoltaic module comprising the same, and belongs to the technical field of photovoltaics. The solar cell includes: a semiconductor substrate; the first carrier selection layer is located on the first surface of the semiconductor substrate, and the material of the first carrier selection layer comprises transition metal oxide; the first middle conductive layer is located on the surface, away from the semiconductor substrate, of the first carrier selection layer, the material of the first middle conductive layer comprises metal nitride or metal sulfide, and the thickness of the first middle conductive layer ranges from 0.2 nm to 10 nm; the second carrier selection layer is located on the surface, away from the semiconductor substrate, of the first intermediate conductive layer, and the material of the second carrier selection layer comprises transition metal oxide with the same conduction type as the first carrier selection layer; the electrode is in contact with the surface, far away from the semiconductor substrate, of the second carrier selection layer; the sum of the thickness of the first carrier selection layer and the thickness of the second carrier transmission layer is 4 nm to 10 nm. And / or the doping concentration of the first carrier selection layer and the doping concentration of the second carrier transmission layer are respectively smaller than or equal to 1 * 10 < 21 > atom / cm < 3 >.

The invention relates to a solar cell, a solar cell and a preparation method thereof, and a photovoltaic module. The solar cell includes: a semiconductor substrate; the first tunneling layer is located on the surface of one side of the semiconductor substrate; the carbon-doped polycrystalline silicon layer is located on the surface of the side, away from the semiconductor substrate, of the first tunneling layer; the second tunneling layer is located on the surface of the side, away from the first tunneling layer, of the carbon-doped polycrystalline silicon layer; the doped polycrystalline silicon layer is located on the surface of the side, away from the carbon-doped polycrystalline silicon layer, of the second tunneling layer, the first passivation layer is electrically connected with the doped polycrystalline silicon layer, and ohmic contact is achieved through the first electrode and the doped polycrystalline silicon layer; the second tunneling layer is in contact with the doped polycrystalline silicon layer on the outer layer and can block the metal slurry of the metal electrode; the carbon-doped polycrystalline silicon layer has an anti-corrosion effect on the metal slurry, can inhibit the corrosion of the slurry to the semiconductor substrate and the first tunneling layer, can improve the contact stability, and can improve the conversion efficiency of the solar cell.

This invention provides a method and application for preparing bio-organic fertilizer through synergistic composting of biochar-containing biogas residue, belonging to the field of organic fertilizer preparation technology. The method includes: preparing biogas residue through anaerobic fermentation of livestock and poultry manure and crop straw; adding biochar and a compound microbial agent; conducting high-temperature aerobic composting; and obtaining bio-organic fertilizer through maturation and aging. The amount of biochar added is 5%-10% of the dry basis weight of the composting raw materials; the aerobic composting time is 35-45 days; and the high-temperature composting temperature is 55-65℃. The compound microbial agent includes *Bacillus steatophilus*, *Bacillus amyloliquefaciens*, and *Bacillus mucilaginosus*. The bio-organic fertilizer obtained by this invention can be used for crop soil improvement. This invention, through the synergistic effect of biogas residue, biochar, and compound microbial agent, effectively shortens the composting cycle, improves compost maturity, reduces nitrogen loss, passivates heavy metals, and significantly improves the quality of organic fertilizer.

A solar cell includes a silicon substrate, a first passivation film, and a second passivation film. The silicon substrate includes a first surface, a second surface opposite to the first surface, and a side surface connecting the first surface and the second surface. The first passivation film is located on the first surface and completely covers the first surface. The second passivation film is located on the second surface and partially covers the second surface. The second passivation film extends from the periphery of the silicon substrate to the center of the silicon substrate to form an irregular ring. The passivation film is deposited on the first surface of the silicon substrate and is plated on the edge area of the second surface in a winding manner, and the problems of color difference of the back surface appearance, blackening of the EL edge and the like during preparation of the battery can be well solved by subsequently superposing the anti-reflection film on the second surface; meanwhile, the passivation film deposited on the second surface passivates defects such as holes and over etching on the edge of the second surface, so that the performance of the battery is improved. The utility model also provides a photovoltaic module comprising the solar cell.

The invention relates to a secondary battery and an electric device. The secondary battery comprises a positive pole piece, a negative pole piece and an electrolyte, the negative pole piece comprises a negative active layer, the negative active layer comprises a binder, and the binder comprises polytetrafluoroethylene; based on the mass of the negative electrode active layer, the mass content of polytetrafluoroethylene is a; in the negative electrode active layer, part or all of the polytetrafluoroethylene exists in a fibration form, and the fiber amount of the polytetrafluoroethylene is b; the electrolyte comprises a solvent and an additive, the solvent comprises carbonic ester and carboxylic ester, and the additive comprises lithium borate; based on the mass of the electrolyte, the mass content of the lithium borate salt additive is c; wherein c is more than or equal to 0.005 * a * b and less than or equal to 0.02 * a * b. According to the secondary battery disclosed by the invention, the electrolyte is reduced on the surface of the negative pole piece early to form a stable interface protection film, so that the negative active material can be passivated well while the reduction lithium consumption of the negative binder is inhibited, and the first effect and circulation of the battery are improved.

The utility model relates to the technical field of mining machinery, and discloses a casting surface passivation device for mining machinery, which comprises a support frame, a passivation box is fixedly connected to the lower side of the inner wall of the support frame, a movable shell is arranged above the passivation box, the support frame internally comprises a storage assembly, the storage assembly comprises a clamping device, and the clamping device is arranged above the movable shell. According to the casting storage device, the storage assembly is arranged, under the action of the clamping equipment, a casting can be conveniently clamped, under the action of the guide ring, the rolling balls slide in the guide grooves, after the rolling balls move in the guide grooves, the extension rods are driven to move, and the casting can be conveniently stored. According to the casting passivation device, the guide ring is arranged, so that clamping equipment on the extension rod is influenced by inclination of the guide ring, the height of the extension rod can be changed, a casting can move up and down, the casting can make full contact with a passivation agent in the passivation box, and the casting can be subjected to comprehensive passivation.

The present invention belongs to the technical field of solar cells, and specifically relates to a method for preparing an n-TOPCon cell with a thinned back poly structure. The technical key points are as follows: a stacked structure including a tunneling oxide passivation structure is prepared by a PECVD method on the back, and the stacked structure obtained after annealing is: a first SiO x / The first poly‑Si(n + ) / Second SiO x / The second poly‑Si(n + ) / PSG; using a laser to act on the PSG in the non-contact area to loosen the PSG in the non-contact area and form pores to form loose PSG; using alkaline washing to allow the alkaline solution to pass through the pores of the loose PSG to form the second poly-Si(n + ) and the second SiO x The purpose of thinning the back of the n-TOPCon cell is achieved while retaining the poly-Si in the contact area, reducing the risk of cell burn-through and improving cell efficiency.

The present invention provides a solar cell passivation layer structure and a preparation method and application thereof, the preparation method comprising: (1) using one or more of nitrous oxide, ammonia and hydrogen to perform dangling bond chemical activity modification treatment on the substrate surface; depositing an aluminum oxide film layer on the substrate surface, and performing plasma treatment on the aluminum oxide film layer to obtain a modified aluminum oxide film layer; (2) depositing an aluminum oxynitride film layer on the surface of the modified aluminum oxide film layer to form a double-layer laminated structure; (3) annealing the double-layer laminated structure under a protective atmosphere. The present invention performs plasma treatment on the aluminum oxide film layer, so that the aluminum oxide itself adsorbs more OH bonds and H bonds with stronger binding energy, and deposits an aluminum oxynitride film layer on the surface of the modified aluminum oxide film layer to enhance the passivation performance of the modified aluminum oxide film layer and the light absorption function of the solar cell, thereby improving the passivation effect.

The application provides an organic molecule additive for a perovskite solar cell and a preparation method and application thereof. A structural formula of the organic molecule additive is shown in the following; wherein R1 and R2 are each independently selected from any one of -H, -CH3, -OH, -COOH, -SO3H, -F, -Cl, -Br, -I, -O-CH3 or -NH2; and R3 is a pyridyl group. In the organic molecule additive provided by the application, an electron-rich carbonyl group and an electron donor unit -C=N- can be coordinated with Pb 2+ defects existing on the surface of a perovskite thin film, and the spatial configuration of N can increase the steric hindrance of the molecule, which is beneficial to the passivation of the perovskite thin film. In addition, R1 and R2 as substituents can further coordinate with Pb 2+ defects, and improve the film quality of the perovskite thin film. Therefore, the organic molecule additive in combination with the perovskite solar cell can significantly reduce defects and improve the film quality.