47 results about "Cell technology" patented technology

This invention relates to the field of organic photovoltaic cell technology, and particularly to a low-melting-point alloy top electrode, its preparation method, and its application. The preparation method of the low-melting-point alloy top electrode includes the following steps: heating and melting a low-melting-point alloy, adding it to a syringe equipped with a heating head, and using a temperature control system to control the heating head on the syringe to maintain the low-melting-point alloy in a liquid state; controlling printing parameters so that the liquid low-melting-point alloy is pulled out from the syringe needle by shear force and printed onto a substrate; and cooling to obtain the low-melting-point alloy top electrode. This invention uses a solid low-melting-point alloy as raw material and employs fused deposition modeling to prepare a low-temperature alloy top electrode as the top electrode for organic photovoltaic cells. Its electrode film thickness is controllable, enabling the preparation of alloy films with a thickness of less than 100 μm, thereby saving materials and costs; it also exhibits good repeatability, low printing cost, and is suitable for the preparation of large-area battery modules.

The present application relates to the field of solar energy and solid oxide cell technology, and provides a solar multi-generation system based on RSOC and a control method, the system comprising: an RSOC stack module, a photovoltaic device, a first molten salt system and a second molten salt system; the RSOC stack module is in power generation mode SOFC and electrolytic hydrogen production mode PV-SOEC-PTC respectively; high-temperature oxygen-enriched air at the outlet of the RSOC stack module heats air in an air preheater after passing through a combustor, so as to realize heat energy recycling; during operation, high-temperature molten salt in the high-temperature molten salt tank of the second molten salt system enters the RSOC stack module to release heat, so as to maintain the stable working temperature of the stack; the heat-exchanged molten salt is transported to the low-temperature molten salt tank for storage, and at the same time, the first molten salt system is synchronously operated to complete the preheating of water. The high-temperature and low-temperature molten salt tanks of the second molten salt system realize bidirectional heat storage temperature control, and cooperate with the solar molten salt preheating of the first molten salt system, so as to realize efficient switching and stable and controllable temperature of SOFC power generation and SOEC electrolysis modes.

The invention discloses an application of a GmEF9 gene in enhancing soybean nematode resistance. The application of the GmEF9 gene or a biological material related to the GmEF9 gene in at least one of the following aspects: A1) regulating and controlling the soybean nematode resistance or preparing a product for regulating and controlling the soybean nematode resistance; a2) cultivating soybeans with improved nematode resistance or preparing products for improving the nematode resistance of the soybeans; a3) preparing transgenic soybeans; the nucleotide sequence of the GmEF9 gene is as shown in SEQ ID NO. 1. The gene GmEF9, which is remarkably and highly expressed in syncytial bodies of disease-resistant varieties, is successfully identified by comparing and analyzing gene expression profiles of the disease-resistant and susceptible soybean varieties in SCN-infected early-stage root tissues by utilizing a single cell nucleus transcriptome technology. The over-expression of GmEF9 can significantly enhance the SCN resistance of infected soybeans and effectively inhibit the development of nematodes in roots (J3-J4 stage). The research not only provides a new key gene resource for soybean anti-SCN breeding, but also provides a method example for analyzing a plant-pathogen interaction mechanism by using a leading-edge single cell technology.

This application discloses a universal DC belonging to the field of immune cell technology, a method for manufacturing the same, and an application. The universal DC is a universal DC that does not express HLA-I class molecules, obtained by knocking out HLA-I class genes from the original DC. When applied, depending on the HLA-I class molecular subtype of the target antigen-specific T cells to be obtained, HLA-I class molecules matching the target antigen-specific T cells can be re-expressed in the universal DC through gene editing, viral, or mRNA technology. This overcomes the cell-specific matching limitations of HLA-I class molecules present in the application of allogeneic DCs and resolves the problem of insufficient coverage of a single DC HLA-I class molecular subtype.

This invention relates to the field of photovoltaic cell technology, and discloses a high-efficiency solar crystalline silicon substrate and its fabrication process, as well as a photovoltaic cell. The fabrication process of the high-efficiency solar crystalline silicon substrate of this invention includes a first light-trapping section fabrication step, specifically including: STEP 11: forming a protective layer on the surface of the silicon substrate; STEP 12: a film-opening step, wherein the shape of the opened film area is a narrow groove; STEP 13: a first light-trapping section forming step: the first light-trapping section includes at least one first light-trapping unit and at least one second light-trapping unit, the first light-trapping unit has a first light-trapping surface, the setting direction of the second light-trapping unit is not parallel to the setting direction of the first light-trapping unit, and at least one second light-trapping unit is disposed on the surface of each first light-trapping unit; STEP 14: a protective layer removal step. The cell fabricated using the process of this invention enables multiple reflections of light when passing through the first and second light-trapping sections, ultimately allowing for more complete absorption of the light.

The invention relates to a light energy battery technology based on ferroelectric polarization. The invention belongs to the technical field of renewable energy sources, new energy sources and clean energy sources, and belongs to national key industries. The technical problems to be solved are that the conversion efficiency of a silicon electric p-n junction solar cell is relatively low, and a photovoltaic power generation system of the silicon electric p-n junction solar cell has intermittency, volatility and uncertainty. The technical scheme for solving the problem is characterized in that ferroelectric photovoltaic positive and negative polarization is opposite in conductive property, generated positive and negative photoelectric conversion batteries form a battery unit, and formed positive and negative magnetic fields are combined into a unified magnetic field. The conversion efficiency of the battery unit is improved, all-optical and all-time fixed mode power generation is realized, and the problems of intermittency, volatility and uncertainty are avoided. The solar power generation device is mainly used for solar power generation to cope with climate changes. In the field of aerospace, energy is provided for space stations and satellites. The invention relates to the field of military weapons, and relates to cold light missiles made of energy power and cold light materials to prevent heat tracking.

This application relates to the field of photovoltaic cell technology, and in particular to a method for fabricating solar cells, solar cells, and photovoltaic modules. The method for fabricating the solar cell includes: providing an N-type silicon substrate; forming a boron diffusion layer and a BSG layer on the back side of the N-type silicon substrate, and dividing the back side into alternating first and second regions; performing laser processing on the first region to form multiple voids in the BSG layer; and then performing alkaline polishing to selectively etch the boron diffusion layer in the first region while retaining the BSG layer. This fabrication method, by using a laser to form voids in the BSG layer of the first region instead of direct ablation, and utilizing these voids as channels for subsequent alkaline polishing to selectively etch away the underlying boron diffusion layer while retaining the BSG layer in the first region, minimizes damage to the silicon substrate structure and reduces lateral damage to the adjacent second region caused by laser thermal effects.

This invention relates to the field of organic photovoltaic cell technology, specifically to a non-fullerene acceptor material and a mixture containing the same. The molecular structure is optimized by limiting the side-chain alkyl chain configuration and the selection of electron-withdrawing ends of the non-fullerene acceptor material. When the non-fullerene acceptor material of this invention is applied to the photoactive layer of an organic photovoltaic device, it exhibits excellent photoelectric performance.

This application discloses an electrode paste and a solar cell, relating to the field of photovoltaic cell technology, to solve the problem of difficulty in controlling the passivation layer during the etching process of solar cells. The electrode paste comprises: silver-coated copper powder, conductive filler, a binder system, a solvent, and additives. The binder system includes a curing resin and a curing agent. The curing resin can undergo a crosslinking reaction with the curing agent at a first temperature, which is lower than the critical oxidation temperature of the silver-coated copper powder. The solar cell includes the electrode paste provided by the above-described technical solution. The electrode paste provided in this application is used to prepare solar cells.

This invention relates to the field of photovoltaic cell technology, and discloses a graphical simulation method and related equipment for heterojunction cells. The method includes acquiring measurement data of the cell grid lines; constructing a simulation model of the heterojunction cell based on the acquired grid line measurement data; optimizing the number of front and back grid lines according to the simulation model, and determining the final grid line layout based on the optimization results. The simulation model, built based on accurate grid line measurement data, can accurately simulate the performance of the cell under different grid line layouts. By optimizing the number of front and back grid lines, the optimal grid line layout can be accurately found, thereby maximizing the photoelectric conversion efficiency and output power of the cell.

The utility model relates to the technical field of photovoltaic cells, and particularly discloses an IV test intelligent diagnosis system of a photovoltaic cell array, which comprises a cabinet body, a liquid crystal display screen, a photovoltaic cell array confluence module, a relay centralized control module, an intelligent control module, a photovoltaic cell array output acquisition module and a power supply module, the cabinet body is an accommodating structure of the system, a liquid crystal display screen is arranged on the surface of the cabinet body, and the photovoltaic cell array convergence module, the relay centralized control module, the intelligent control module, the photovoltaic cell array output acquisition module and the power supply module are all installed in the cabinet body. According to the IV test intelligent diagnosis system of the photovoltaic cell array, resistance parameters are controlled by an automatic control system in a program mode to change array output voltage, and compared with a traditional complex operation mode of manually changing the resistance value of an electronic load, the scanning efficiency of an IV curve is greatly improved, so that the test process is more convenient and efficient, and the test efficiency is improved. And the labor and time cost is reduced.

This invention discloses a method and system for photovoltaic cell parameter identification based on an intelligent hierarchical model, relating to the field of photovoltaic cell technology. The method includes real-time acquisition of photovoltaic cell operating data, denoising and feature extraction of the acquired data, and dimensionality reduction and fusion of the data using an adaptive tensor decomposition algorithm. Based on the physical characteristics of photovoltaic cells, an intelligent hierarchical model is constructed, and a feature interaction mechanism based on a hypergraph neural network is introduced to train the intelligent hierarchical model. The model parameters are optimized using an adaptive differential evolution algorithm based on chaotic mapping. The test set is input into the trained intelligent hierarchical model, and key parameters of the photovoltaic cells are output layer by layer. The identified parameters are stored and visualized, and a report on parameter uncertainty quantification and dynamic confidence intervals are generated. This invention guides the optimized design and operation control of photovoltaic systems through accurate parameter identification and model optimization, improving overall performance and energy conversion efficiency.

This utility model discloses a flotation cell, belonging to the field of flotation cell technology. It includes a cell body and an aeration structure. The cell body has through-slots and locking slots on its left and right sides, respectively. Bottom baffles and top baffles are respectively provided at the bottom and top of the through-slots. The aeration structure includes a connecting pipe, a movable cover, an aeration pipe, and an aeration pump. The connecting pipe is located at the bottom of the cell body, the movable cover is located at the bottom of the outer surface of the connecting pipe, the aeration pipe is located at the bottom of the movable cover, and the aeration pump is located at the end of the aeration pipe furthest from the movable cover. This flotation cell changes the size of the bubbles by altering the length of the aeration pipe extending into the movable cover, thus changing the airflow at the bottom. The combination of porous media, the aeration pipe, the movable cover, and the aeration pump simulates the effect of a flotation column foamer, achieving micro-bubbles during bottom aeration, optimizing the flotation effect, and improving the flotation recovery rate of both oxide and sulfide ores. Bottom aeration allows large mineral particles to contact the bubbles, improving their floatability.

This application provides a PERC cell and its fabrication method, belonging to the field of photovoltaic cell technology. The fabrication method includes texturing, diffusion, etching, back-side polishing, annealing, back-side coating, and front-side coating. The back-side coating step includes: introducing ozone gas into a device containing an annealed silicon wafer for oxidation treatment, forming a back-side silicon dioxide layer on the back of the silicon wafer. Then, ozone is continuously introduced into the same device as an oxygen source, and an aluminum source is added to deposit a back-side aluminum oxide layer on the back-side silicon dioxide layer. A back-side silicon nitride layer is then deposited on the back-side aluminum oxide layer. This fabrication method forms a back-side silicon oxide layer by introducing ozone, and using ozone as an oxygen source, a back-side aluminum oxide layer can be deposited in the ozone-introducing device. Both the back-side silicon dioxide layer and the back-side aluminum oxide layer can be formed in the same device, eliminating the need for additional ozone oxidation equipment, maintaining the cleanliness of the film layer contact interface, and improving the PID performance of the PERC cell.

A valve assembly may include a valve body including a plurality of conduits extending through the valve body. A valve assembly may include a plurality of pinch bits configured to translate parallel to a first axis to selectively engage the conduits. A valve assembly may include a plunger comprising: a plunger shaft, a first bit guide configured to actuate a first pinch bit of the plurality of pinch bits in a direction parallel to the first axis in response to translating the plunger shaft along a first direction substantially perpendicular to the first axis; and a second bit guide configured to actuate a second pinch bit of the plurality of pinch bits in a direction parallel to the first axis in response to translating the plunger shaft along the first direction, wherein the plunger is configured to translate the first pinch bit and the second pinch bit in opposite directions.

This invention relates to the field of photovoltaic cell technology, specifically to a photovoltaic module cover plate and its preparation method, a photovoltaic module and its preparation method, and its applications. A photovoltaic module cover plate includes a glass cover plate, which comprises a glass substrate and a microlens array located on one side surface thereon. The glass substrate and the microlens array are integrally formed. The microlens array includes a plurality of convex lens units; each convex lens unit has a hemispherical structure, and its diameter D is 10~500μm. The center-to-center distance L between adjacent convex lens units satisfies the condition 1≤L / D≤1.2. The photovoltaic module cover plate of this invention exhibits stable and long-lasting self-cleaning performance, high power generation efficiency, and strong process compatibility.

This application provides a method for improving the uniformity of alumina passivation films, relating to the field of photovoltaic cell technology. The method includes: placing a substrate in a reaction chamber; heating the reaction chamber and introducing a first reaction source and an inert gas for deposition; subjecting the reaction chamber to a first vacuum, followed by a first purging with the inert gas, and then subjecting the reaction chamber to a second vacuum; introducing a second reaction source and the inert gas for atomic layer deposition; subjecting the reaction chamber to a third vacuum, followed by a second purging with the inert gas, and then subjecting the reaction chamber to a fourth vacuum; wherein the first reaction source comprises trimethylaluminum, the second reaction source comprises water vapor, and the inert gas comprises nitrogen. The method of this application can effectively make the passivation film growth more uniform, thereby improving the density and uniformity of the passivation film, and thus meeting the requirements of the photovoltaic cell field for alumina passivation films.

This invention relates to the field of aluminum electrolysis cell technology, specifically to an aluminum electrolysis cell overhaul slag treatment device and process. It includes a high-temperature heating base frame, with a feeding rack fixedly connected to the rear side of the top of the base frame. By using the high-temperature heating base frame and the feeding rack, this invention achieves quantitative intermittent feeding of the overhaul slag. Through the reciprocating motion of the triangular abutment block in conjunction with the expansion and contraction structure and the sealing structure, the amount of material fed in a single batch is precisely controlled, avoiding the problem of blockage at the crushing system inlet caused by simultaneous feeding of large amounts of material. This ensures smooth material transport in the crushing process, maintains stable operation of the processing flow, and the precise feeding control accurately controls the subsequent addition ratio of chemical binders and curing agents, enabling the mixed material to achieve the expected molding effect. This avoids molding quality defects caused by imbalanced proportions, providing a qualified material basis for subsequent high-temperature calcination treatment and effectively improving the processing efficiency of high-temperature calcination.

This invention relates to the field of photovoltaic cell technology, specifically to a perovskite solar cell and its fabrication method. The fabrication method of the perovskite solar cell includes the following steps: fabricating a first carrier transport layer on one side of a transparent conductive electrode; fabricating a perovskite light-absorbing layer on the side of the first carrier transport layer facing away from the transparent conductive electrode; grinding and polishing the side of the perovskite light-absorbing layer facing away from the first carrier transport layer; fabricating a second carrier transport layer on the side of the perovskite light-absorbing layer facing away from the first carrier transport layer; and fabricating a metal electrode layer on the side of the second carrier transport layer facing away from the perovskite light-absorbing layer, thereby obtaining the perovskite solar cell. The perovskite solar cell fabrication method provided by this invention effectively reduces the surface undulation of the perovskite light-absorbing layer, enhances the adhesion between the second carrier transport layer and the perovskite light-absorbing layer, improves charge transport extraction efficiency, and enhances the photoelectric conversion efficiency and stability of the perovskite solar cell.

The application relates to a display panel and a display device. The display panel comprises a substrate, a light-emitting unit arranged on one side of the substrate, the light-emitting unit comprising a first electrode, a light-emitting functional layer and a second electrode arranged in a stacking manner away from the substrate, and an isolation structure arranged on one side of the substrate, the adjacent light-emitting units being arranged in a spaced manner through the isolation structure. The isolation structure comprises a first touch part and a first conductive part, the first touch part and the first conductive part are arranged in the same layer and are electrically insulated, and the second electrode and the first conductive part are electrically connected. Thus, compared with the display panel adopting the On-Cell technology, on the one hand, the number of film layers of the touch module is reduced, thereby reducing the mask and lowering the manufacturing cost; on the other hand, the thickness of the display panel is reduced, which is beneficial to the light and thin display panel.

This disclosure relates to the field of photovoltaic cell technology and discloses a solar cell. The cell includes a substrate layer, a tower structure, and a reinforcing microstructure. The substrate layer includes a light-receiving surface and a backlighting surface. The tower structure is formed on the backlighting surface and includes a plurality of tower base units recessed inward from the backlighting surface. The reinforcing microstructure is disposed on one side of the backlighting surface and at least partially located within the tower structure, including a plurality of micro units protruding relative to the surface of the tower structure. In this disclosure, the tower base units are recessed relative to the backlighting surface, and the micro units are protruding relative to the surface of the tower base units. This results in the backlighting surface of the substrate layer, the surface of the tower structure, and the reinforcing microstructure exhibiting a multi-level uneven morphology, thereby reducing the surface reflectivity of the backlighting surface, increasing the internal reflection and absorption of long-wavelength light, improving the short-circuit current, and simultaneously increasing the actual contact interface between the substrate layer and the passivation layer per unit projected area, enhancing field-effect passivation, and improving the overall performance of the cell.

This invention belongs to the field of photovoltaic cell technology, and provides an IO target material suitable for RPD, its preparation method and application, and heterojunction cells. The invention first grinds indium oxide powder, then adds a first binder to obtain a first mixed powder. After a first molding and static pressing, a first target material preform is obtained. This preform is then degreased and pre-sintered at 1400-1500℃ for 8-10 hours to obtain a pre-sintered IO preform. After pulverization, it is ground again, a second binder is added, and after drying, a second mixed powder is obtained. This preform is then shaped and statically pressed again to obtain a second target material preform. Finally, it undergoes degreasing and staged vacuum hot pressing sintering to obtain the IO target material. The pure IO target material obtained by this invention has a relative density of about 60% and can be directly used for RPD coating. The deposited TCO thin film has low carrier concentration, high mobility, and high transmittance, which helps improve the photoelectric conversion efficiency of the cell when used in heterojunction cell devices.

This invention relates to the field of thin-film photovoltaic cell technology, specifically to a dual-window layer inverted cadmium telluride photovoltaic cell and its preparation method. This invention aims to solve the problems of poor adaptability to flexible application scenarios, low compatibility of stacked integration, and the contradiction between environmental protection and efficiency in existing cadmium telluride photovoltaic cells. The photovoltaic cell of this invention, from back electrode to top electrode, comprises: an Ag / Mo composite metal back electrode, a ZnTe:Cu / ZnTe:Ag composite back contact layer, an Sb-doped p-type CdTe absorber layer, an n-type dual-window layer, an ITO transparent top electrode, and an optional SiO2 / MgF2 anti-reflection layer; wherein the n-type dual-window layer is a bilayer structure consisting of a ZnS bottom layer and a ZnSnO3 top layer. This invention achieves a balance between environmental protection and high efficiency through the synergistic design of the dual-window layer and the composite back contact layer, combined with inverted structure optimization.

This application provides a laminated unit, a photovoltaic module, and a photovoltaic system, belonging to the field of photovoltaic cell technology. The laminated unit includes a laminate body and an insulating adhesive layer. The insulating adhesive layer wraps around the side of the laminate body, extending at both ends to a first target position on the upper surface and a second target position on the lower surface of the laminate body, respectively. The cross-section of the insulating adhesive layer is U-shaped. Compared with existing technologies, the photovoltaic module composed of the laminated unit provided in this application, for the same size photovoltaic module, can reduce the blank area between the solar cells and the side of the laminate body, thus increasing the area of ​​the solar cells and improving the power generation efficiency of the photovoltaic module.

The invention provides a high-temperature-resistant thin-film capacitor, relates to the electronic industry, and belongs to the technical field of capacitor monomers, the high-temperature-resistant thin-film capacitor comprises a roll core and a protective layer, and the roll core comprises a flexible thin-film substrate, a first metal oxide film layer and a second metal oxide film layer; the first metal oxide film layer and the second metal oxide film layer are arranged on the same side of the flexible thin film base material, the flexible thin film base material is folded into a double-layer structure in the width direction of the flexible thin film base material, and the first metal oxide film layer and the second metal oxide film layer are located on the two outer side portions of the double-layer structure. A double-layer structure is arranged between the first metal oxide film layer and the second metal oxide film layer, a firm composite insulation system is formed, the direct-current voltage-withstanding capability and the pulse voltage-withstanding capability of a product are remarkably improved, only the flexible film base material needs to be folded and wound, and compared with a traditional complex multi-film-layer structure or a thick-film scheme, the manufacturing cost is greatly reduced. The process is simpler, the production cost is lower, and the advantages of high pressure resistance, high temperature resistance and high reliability are achieved.

The invention discloses a photovoltaic cell edge chamfering and cleaning device, and belongs to the technical field of cells. The photovoltaic cell edge chamfering and cleaning device comprises a workbench, a feeding assembly and a chamfering assembly. The grinding wheel and the polishing wheel penetrate through the inclined sliding groove and intersect with the transverse sliding groove to form the included angle, so that when the chamfering platform moves, the inclined sliding groove pushes the mounting block to transversely move, the distance between the grinding wheel and the polishing wheel can be adjusted, and the included angle formed between the grinding wheel and the rotating disc and the included angle formed between the polishing wheel and the rotating disc are kept unchanged all the time; the device can be suitable for photovoltaic cells of various sizes, meanwhile, when the grinding wheel and the polishing wheel move towards the direction of the driving wheel, the distance between the grinding wheel and the polishing wheel can be increased, otherwise, the distance between the grinding wheel and the polishing wheel can be decreased, and therefore the transmission belt can be in a tight state all the time; and after chamfering is completed, dual cleaning is conducted on the photovoltaic cell through dust collection and flushing, and finally the photovoltaic cell is dried through filtered air, so that the service life of the photovoltaic cell is guaranteed.

This invention relates to the field of photovoltaic cell technology, and more particularly to a solar cell, a method for fabricating a photovoltaic cell, and a photovoltaic module. The solar cell includes: a silicon substrate; a trench formed on the silicon substrate; a heavily doped layer formed on the inner surface of the trench; an interface passivation layer formed on the heavily doped layer; and a metal electrode structure formed within the trench and in contact with the interface passivation layer; wherein the doping concentration of the heavily doped layer is greater than the doping concentration of the surrounding silicon substrate material. This application utilizes a three-step synergistic process of "grooving—selective heavy doping—ultra-thin interface passivation" to precisely construct an electrode contact region with both ultra-low contact resistance and excellent interface passivation quality within a micrometer-level trench, providing a core guarantee for the cell to obtain a high open-circuit voltage, and achieving the technical effects of high conductivity, low recombination, and low cost in solar cells.

This utility model relates to the field of photovoltaic cell technology, and discloses a photovoltaic module frame and a photovoltaic module. The photovoltaic module frame includes a mounting frame and a reflective part. The mounting frame has a mounting groove for accommodating the photovoltaic cell module. The reflective part is used to reflect light to the photovoltaic cell module. The reflective part includes a first reflective part and a second reflective part. The first reflective part is located on the top surface of the mounting frame, and the second reflective part is located at the end of the mounting frame. The second reflected light path generated by the second reflective part is located between the first reflected light path generated by the first reflective part and the photovoltaic cell module. Multiple surfaces of the mounting frame achieve full-spectrum reflection by setting reflective parts. The reflective parts fully utilize the light entering the photovoltaic module frame area, allowing sunlight that would otherwise be unusable on the mounting frame to be reflected onto the photovoltaic cell module, optimizing the reflected light path, increasing the amount of light entering the photovoltaic cell module, and increasing the photovoltaic module's efficiency in utilizing sunlight.

The invention discloses a grid line, a preparation method thereof and a photovoltaic cell, and relates to the technical field of photovoltaic cells, and the preparation method of the grid line comprises the steps: printing a first slurry on a to-be-manufactured piece of the grid line according to a preset pattern to form a first grid line; and printing second slurry on the first grid line according to a preset pattern to form a second grid line. According to the grid line preparation method provided by the invention, the second grid line is printed on the first grid line, compared with an existing method for preparing the grid line through single printing, the grid line is prepared by adopting two different kinds of slurry without being limited to silver-containing slurry, the usage amount of silver can be reduced, and meanwhile, the height-width ratio of the grid line can be effectively increased through a superposition printing mode, so that the manufacturing cost of the grid line is reduced. Therefore, low series resistance is ensured, low fill factor and power output are improved, and photoelectric performance and production economy are both considered.

The invention relates to the technical field of photovoltaic cells, in particular to a double-sided texturing method of a silicon wafer and a heterojunction solar cell. The invention provides a double-sided texturing method for a silicon wafer, which comprises the following steps of: sequentially carrying out cleaning, polishing treatment, surface oxide layer removal and double-sided high-temperature gettering treatment on an N-type monocrystalline silicon wafer to obtain a clean N-type monocrystalline silicon wafer; carrying out first phosphorosilicate glass layer removal treatment on the front surface of the clean N-type monocrystalline silicon wafer, and carrying out single-surface texturing treatment on the front surface to obtain a single-textured silicon wafer; and carrying out second phosphorosilicate glass layer removal treatment on the back surface of the single-suede silicon wafer, and then carrying out double-sided texturing to obtain the double-suede silicon wafer. The silicon wafer obtained by the double-sided texturing method provided by the invention can effectively improve the photoelectric conversion efficiency of a heterojunction solar cell, and the preparation process is simple and easy for industrial application.