264 results about "Solar cell fabrication" patented technology

The invention discloses a solar cell process passivation monitoring and repairing device, which relates to the technical field of crystalline silicon solar cell manufacturing, and comprises a test probe row, a roller slide platform, a data analysis system and a laser, the laser is a purple picosecond laser, the pulse energy density is 500W / cm < 2 >-8000W / cm < 2 >, the laser repetition frequency is 500KHz-2000KHz, and the pulse stability is less than 3% RMS. According to the invention, monitoring data is collected, an abnormal area and repair data are analyzed and fed back to the laser, the laser adopts laser with a certain pulse signal to carry out thermal processing, crystal lattices are enabled to vibrate orderly through thermal driving, and internal doping of polycrystalline silicon is redistributed, so that the purpose of repairing an abnormal silicon wafer is achieved. And the manufacturing cost of the solar cell is further reduced.

The invention provides a preparation method of a back contact solar cell. The preparation method comprises the following steps: equally cutting a diffused and etched cell into at least two fragments; performing surface texturing on the cut fragments; performing a passivation process on the back surface and the front surface of the fragment, and forming passivation layers on the back surface, the front surface and the cutting surface of the fragment in the passivation process; patterning the fragments on which the passivation layers are formed so as to define alternative P-type regions and N-type regions on the back surfaces of the fragments; and preparing metalized electrodes corresponding to the P-type region and the N-type region on the back surface of the fragment. The problems that in the prior art, the efficiency loss is large, the repairing cost is high, and the whole piece is scrapped due to local defects caused by battery piece cutting can be solved.

The invention relates to the technical field of solar cell manufacturing, and discloses a method for electroplating copper and tin grid lines on a solar cell, which comprises the following steps of: S1, copper electroplating: putting a cell piece on an electroplating tool, and putting the cell piece into a copper liquid tank for electroplating copper layers on a P surface and an N surface; wherein a very-low-frequency power supply is adopted. And S2, cleaning the copper liquid on the battery piece. S3, tin electroplating: the battery piece after the copper liquid is cleaned is placed in a tin liquid tank for electroplating tin layers on the P surface and the N surface; wherein a very-low-frequency power supply is adopted. And S4, cleaning the tin liquid on the battery piece. And S5, the cleaned battery piece is taken out, and grid line electroplating is completed. The very-low-frequency power supply is used for replacing a silicon controlled rectifier direct-current power supply, and self-developed voltage and current parameters are matched, so that the compactness and the conductivity of the HDT high-efficiency single-crystal heterojunction solar cell on an electroplated metal grid line film layer are improved, and the conversion efficiency of a cell piece is improved.

The invention discloses metallized silver paste for improving sintering dusting of a TOPCon battery, a preparation method and application, and belongs to the technical field of solar battery manufacturing, and the technical scheme is that the metallized silver paste comprises the following components in percentage by mass: 72-87% of a metal phase; 3-9% of a glass phase; 8-12% of an organic carrier; 0.1%-0.5% of a polyimide precursor; 0.1 to 0.5 percent of cerium oxide; wherein the polyimide precursor forms a cross-linked network at a high temperature, the cerium oxide is used as a passivation layer protective agent, and lithium borosilicate glass is also added into the glass phase; according to the metalized silver paste for improving the sintering dusting of the TOPCon cell, the preparation method and the application, the dusting rate is reduced by improving and optimizing materials and process parameters, and compared with a traditional process, the efficiency, the photoelectric conversion efficiency and the yield of the solar cell are further improved.

The invention discloses TMA evaporation equipment for solar cell manufacturing in the technical field of solar cell manufacturing. The TMA evaporation equipment comprises a cabinet body, a conveying assembly, a buffer tank, an evaporator, a cabinet door, a partition plate, a storage grid and a through opening. In the working process of the TMA evaporation cabinet, the buffer tank is pulled to be far away from the position of the through opening by using the storage grids, the pulling plate, the bearing plate and the like when a fire occurs in the cabinet body, so that the storage grids and the buffer tank can be moved downwards after the fire occurs in the cabinet body, and the buffer tank can be far away from a fire source; the situation that the fire in the cabinet body spreads to the position of the buffer tank, so that the buffer tank explodes, the fire is expanded and larger loss is caused is avoided, the fire extinguishing box is triggered by the detection cylinder to extinguish fire when the fire occurs, the fire extinguishing opening can be opened at the first time to extinguish the fire in the cabinet body when the fire occurs in the cabinet body, the loss is reduced, and the safety of the cabinet body is improved. And manual fire extinguishing is not needed, so that the workload of workers is reduced, and the risk of manual disposal is reduced.

A solar cell, a manufacturing method thereof, and a photovoltaic module are provided. The solar cell includes a substrate having electrode regions and non-electrode regions that are alternatingly arranged in a first direction, where the non-electrode regions of the substrate include a plurality of first regions and a plurality of second regions; a doped conductive layer formed over the dielectric layer; a passivation layer formed over the first regions and the doped conductive layer; and a plurality of electrodes.

The invention relates to a preparation method of a solar cell, the solar cell and a photovoltaic module, and belongs to the field of photovoltaic technology, and the preparation method of the solar cell comprises the steps: providing a substrate, the first surface of the substrate is provided with a pyramid structure, a doped conductive region is formed on the first surface, and a silica glass layer is formed on the side, away from the first surface, of the doped conductive region; laser processing is carried out on the first area part of the first surface, so that a low-concentration doped area is formed in the substrate, meanwhile, at least part of the silica glass layer located at the spire part of the pyramid structure in the first area is broken to form a notch, wet etching is carried out on the first surface side, and the notch can accelerate the rate of subsequent etching of the surface film layer of the first area; therefore, the efficiency of preparing the solar cell is improved.

The invention relates to the technical field of solar cells, and particularly discloses conductive paste for a solar cell, a preparation method of the conductive paste and an electrode. The conductive paste for the solar cell comprises the following components in percentage by weight: 88%-92% of carbon-based nano-copper particles, 4%-6% of glass powder and 4%-6% of an organic additive, the carbon-based nano-copper particles are prepared by reacting copper chloride with glucose and then calcining, the particle size is 52-100nm, and copper oxidation is inhibited by using a carbon layer; the organic additive is composed of a stabilizer, resin and an organic solvent according to a ratio of 1: 3: 9. The conductive material is prepared by mixing, dispersing, grinding and filtering, and can be prepared into a solar cell conductive material by silk-screen printing and high-temperature sintering. The conductive paste is low in cost, high in oxidation resistance and excellent in conductivity, and can replace silver paste to reduce the manufacturing cost of the solar cell, improve the performance and prolong the service life.

The invention relates to the field of solar cell manufacturing, and particularly discloses a polishing additive for solving the black core problem in the BC cell pre-rough polishing process and a use method of the polishing additive. 0.1-5% of a defoaming agent; 0.1 to 0.5 percent of pH (Potential of Hydrogen) regulator; and the balance of deionized water. According to the method, the accelerant, the defoaming agent and the pH regulator in a specific ratio are combined, so that the oxidation reaction on the surface of the silicon wafer is more uniform and controllable; the accelerant accelerates formation and dissolution of a surface oxide layer, and generation of black cores is effectively avoided; the synergistic effect of the defoaming agent ensures that bubbles generated by the reaction can be quickly desorbed, the problem of uneven local corrosion caused by bubble retention is prevented, the surface of the polished silicon wafer is completely free of black nuclei, and ideal surface conditions are provided for subsequent processes.

The invention belongs to the technical field of solar cell manufacturing, and provides a step temperature cycle propulsion boron diffusion process and application thereof. The boron diffusion technology comprises the steps that a silicon wafer is placed in boron diffusion equipment, pre-oxidation, pre-deposition and stepped temperature circulation boron diffusion propelling are sequentially carried out on the silicon wafer, and the stepped temperature circulation boron diffusion propelling procedure comprises an initial stage, a middle stage and a final stage which are sequentially carried out. A circulation mode of heating oxygen-free boron expansion and pushing junction and then cooling oxygen-filled boron expansion and pushing junction is adopted in each stage for multiple times of circulation, and the heating temperature and the cooling temperature of each stage are optimized, so that a boron expansion doping layer is formed on the surface of the silicon wafer. According to the boron diffusion process, the oxidation temperature can be reduced, the concentric circle defect can be eliminated, the junction depth and the surface doping concentration of boron diffusion doping can be increased, the uniformity of boron diffusion doping can be improved, the FF, Jsc, Uoc and Eta of the battery can be further improved, the thermal budget can be reduced, and the service life of equipment can be prolonged.

A solar cell includes a semiconductor substrate, in which a rear surface of the semiconductor substrate having non-pyramid-shaped microstructures, the non-pyramid-shaped microstructures include two or more first substructures at least partially stacked on one another, and a one-dimensional size of the surface of the outermost first substructure is less than or equal to 45 μm; a first passivation layer located on a front surface of the semiconductor substrate; first and second tunnel oxide layers located on the non-pyramid-shaped microstructures; first and second doped conductive layers located on a surface of the first and second tunnel oxide layers, the first and second doped conductive layer has different conductive types; a second passivation layer located on a surface of the first and second doped conductive layers; and electrodes formed by penetrating through the second passivation layer to be in contact with the first and second doped conductive layers.

The invention discloses a preparation method of a back contact solar cell and the back contact solar cell, and relates to the technical field of solar cell manufacturing, and the method comprises the steps: sequentially preparing an emitter containing a first doping element and an oxide layer on a first main surface in the thickness direction of a silicon substrate from inside to outside; removing and polishing the emitter and the oxide layer in the first area on the first main surface; sequentially preparing a tunneling oxide layer and a doped polycrystalline silicon layer containing a second doping element on the second main surface and the first region in the thickness direction of the silicon substrate from inside to outside, so as to form high-low junctions on the surfaces of the second main surface and the first region; wherein the doping type of the emitter is opposite to that of the doped polycrystalline silicon layer; and removing the tunneling oxide layer and the doped polycrystalline silicon layer on the second main surface. According to the embodiment, the sunlight utilization rate of one side of the shady face of a partial area is effectively improved, meanwhile, a high-low junction is formed on the second main surface of the silicon substrate, and the overall photoelectric conversion efficiency of the solar cell is improved.

The utility model discloses a back-junction double-sided passivated solar cell, which relates to the technical field of solar cell manufacturing and comprises a silicon substrate, a back-junction double-sided passivated solar cell and a back-junction double-sided passivated solar cell, metal areas with micro-textured structures and non-metal areas with textured structures are alternately arranged on one side of the silicon substrate in the thickness direction; the suede structure and the micro suede structure are different in tower footing size; a first tunneling oxide layer and a first doping layer doped with a first doping element are stacked on the metal region from inside to outside; according to the embodiment, the metal areas with the micro-textured structures and the non-metal areas with the textured structures are alternately arranged on one side of the thickness direction of the silicon substrate, so that the non-metal areas can be ensured to be the textured structures without front fields, the passivation effect is reserved and optimized to the greatest extent, and the transverse transmission of charges is not influenced. And meanwhile, the first tunneling oxide layer and the first doping layer are arranged on the micro suede structure of the metal region, so that enough tensile stress can be provided on the basis of not influencing passivation and contact performance.

The invention relates to a solar cell and a photovoltaic module, and the solar cell comprises a cell piece, a grid line module is arranged on the cell piece, the grid line module comprises a main grid structure and an auxiliary grid structure which are stacked, a first marking structure is arranged on the cell piece, the first marking structure is used for marking the main grid structure, a second marking structure is arranged on the cell piece, and the second marking structure is used for marking the auxiliary grid structure. The first marking structure is used for marking the main grid structure, the second marking structure is used for marking the auxiliary grid structure, and orthographic projections of the first marking structure and the second marking structure on the battery piece are located on the periphery of the orthographic projection of the main grid structure on the battery piece and the periphery of the orthographic projection of the auxiliary grid structure on the battery piece. According to the solar cell, a worker can conveniently adopt the first marking structure and the second marking structure at the same position to accurately overlap different main grid structures and auxiliary grid structures in the area, where the grid line assembly is arranged, of the cell piece, so that the marking structures are prevented from being reset, time, manpower and material resources required for manufacturing the solar cell are reduced, and production efficiency is improved. And the manufacturing efficiency of the solar cell is improved.

The invention relates to the technical field of solar cell manufacturing, provides a pyramid suede structure suitable for a perovskite crystalline silicon laminated cell and a preparation method of the pyramid suede structure, and solves the problems that an existing suede structure is low in light capture efficiency and poor in surface morphology consistency. The method comprises the following steps: selecting a (100) crystal orientation monocrystalline silicon wafer for cleaning treatment; preparing a down solution from a plurality of components including boron-containing ammonium hydroxide, sodium hydroxide, sodium silicate, isopropanol, polyethylene glycol, sodium citrate and the like; uniform nucleation points are formed through chemical pre-etching and beta-cyclodextrin surface modification; wherein the boron-containing ammonium hydroxide is prepared by reacting boric acid with ammonia gas under an alkaline condition. The prepared pyramid suede structure is composed of tetrahedral pyramid units which are regularly arranged. The method is stable in process and good in reproducibility, and the prepared textured structure has excellent light capture efficiency and surface consistency and is suitable for manufacturing efficient perovskite crystalline silicon laminated cells.

In one aspect, a manufacturing method for a solar cell comprises: an oxidation impurity removal and cleaning step carried out between a wet texturing step and a boron / phosphorus diffusion step. The oxidation impurity removal and cleaning step comprises: heating a silicon wafer undergoing wet texturing performed by means of basket loading, so as to form first oxide layers to adsorb impurities of the silicon wafer; and removing the first oxide layers on the front surface and the back surface of the silicon wafer.

The invention discloses a T0PCon solar cell edge coating passivation treatment device and process, relates to the technical field of solar cell manufacturing, aims to solve the technical problem of poor side passivation effect after solar cells are cut by adopting ALD in a solar cell stacking mode, and comprises a reaction tank body, a base, a stacking mechanism and a functional mechanism. The solar cell is placed in the gap between the two partition plates, passivation gas is isolated through the sealing gaskets A, so that the surface of the solar cell is protected, the protection gas cavity is defined by the gas grooves, the two corresponding sealing gaskets A and the surface of the solar cell, and protection gas is introduced into the protection gas cavity, so that the surface of the solar cell is protected. The surface of the solar cell is further protected by the air curtain isolation layer in the protection air cavity, passivation gas is limited in the cutting area through protection, the extrusion contact requirement of the sealing gasket A and the solar cell is reduced through the air curtain isolation layer, and therefore damage to the solar cell is reduced.

An apparatus for manufacturing a solar cell, according to one embodiment of the present invention, comprises: a solar cell having wires arranged therein; a stage on which the solar cell is mounted; and a shaft arranged on a moving path of the stage at a lower side of the stage, wherein the stage comprises: a main body; a plate arranged to move up and down in the main body and in contact with the shaft arranged at a lower side; and a plurality of pins mounted on the plate at an upper side of the plate, wherein, when the stage moves, the stage rides up on the shaft, the shaft pushes the plate on which the plurality of pins are mounted upward, and the upper surfaces of the plurality of pins move upward to bring the wires of the solar cell into contact with a surface of the solar cell.

The invention discloses a silicon wafer pyramid suede modification method and a solar cell, and belongs to the technical field of solar cell manufacturing. The silicon wafer pyramid suede modification method comprises the following steps: pretreatment; in the first step of texturing, a silicon wafer is placed in an alkaline solution containing an additive A, and a basic pyramid textured surface is formed through reaction; washing with water; second-step modification: placing the silicon wafer in an alkaline solution containing an additive B, and reacting to form a tower body step structure and a nano pit; carrying out post-treatment; the additive A and the additive B are heterologous additives of different chemical systems; the temperature of the first-step texturing is higher than that of the second-step modification. According to the method, the high-density basic pyramid suede is firstly constructed, then directional etching is performed on the tower body, and the stepped laminated surface and the surface nano pit array are synchronously formed, so that the comprehensive performance of the solar cell can be improved.

This utility model discloses a silicon substrate, a solar cell, and a photovoltaic module, relating to the field of solar cell technology, to solve the problem that after initial silicon wafers are treated with laser thermal cracking, excessive edge stress leads to a high breakage rate and significant performance degradation during subsequent solar cell fabrication. The silicon substrate includes a first surface and a second surface opposite to each other, and a plurality of side surfaces connecting the first and second surfaces; the side surfaces include a first side surface, wherein at least a portion of the first side surface has a first protrusion, one end of the first protrusion being close to the first surface, and the other end of the first protrusion being close to the second surface; along the direction from the first surface to the second surface, the distance between any point on the first protrusion and the first side surface first increases and then decreases.

The invention relates to the field of solar cell manufacturing, in particular to a half-cell section laser passivation method for preventing winding plating and application, and the method comprises the following steps: (a) placing a cut half-cell into a processing chamber with the section facing upwards; (b) emitting laser to the tangent plane at a non-vertical incidence angle, so that the laser only covers the exposed area of the tangent plane; (c) introducing oxygen-containing gas and water vapor, and decomposing section pollutants by laser excitation; and (d) alternately introducing an aluminum source gas and an oxidizing gas, simultaneously irradiating the section with laser, and selectively depositing an aluminum oxide layer on the section. According to the method, aluminum oxide normally grows at the section position and aluminum oxide deposition is almost not carried out at the non-section position in a mode that the extremely-low flow source is matched with the laser to enhance the section deposition rate, so that the generation of winding plating at the front and back side edges is reduced, and the appearance and poor welding are reduced.

The invention discloses a solar cell and a photovoltaic module, and relates to the field of photovoltaic technology. The solar cell comprises a semiconductor substrate, the first surface of the semiconductor substrate is provided with a first semiconductor layer, the first semiconductor layer is provided with isolation regions, and the isolation regions are arranged at intervals in the first direction and extend in the second direction; the passivation layer at least covers one side, deviating from the semiconductor substrate, of the first semiconductor layer and the isolation region; the passivation layer is provided with a plurality of groups of first holes; at least part of the first grid lines are electrically connected with the first semiconductor layer through a group of first holes, and the first grid lines are formed by base metal slurry; in the first direction, the distance between the hole edge close to the first edge and the hole edge close to the second edge in the first open holes in the same group is W1, the width of the first semiconductor layer is W2, the width of the first grid line is W3, W2 / W3 is larger than or equal to 2 and smaller than or equal to 50, and W3 / W1 is larger than or equal to 1.2 and smaller than or equal to 4.5. The light absorption and utilization rate is improved while the manufacturing cost of the solar cell is reduced.

The present invention relates to a texturing liquid for a single crystal PERC cell and a texturing method thereof, and belongs to the technical field of solar cell manufacturing. The texturing liquid includes a first texturing liquid and a second texturing liquid; the first texturing liquid is composed of the following raw materials in weight percentage: 1%-2.5% of a KOH solution with a concentration of 45%, 0.3%-0.7% of a texturing additive, and the rest is deionized water; the texturing additive is composed of the following raw materials in weight percentage: deionized water, a texturing etchant, a complexing agent, molasses after clarification, a surfactant, and a defoaming agent; the second texturing liquid is composed of the following raw materials in weight percentage: 0.05%-0.1% of a KOH solution with a concentration of 45%, and the rest is deionized water. After texturing by the present invention, the conversion efficiency of the cell is improved, a small and uniform texturing surface is formed on the surface of the single crystal PERC cell, the reflectivity of the texturing surface is reduced, the use of chemicals is reduced, and costs are saved.

To provide a mask for film formation, achieving an improvement in pattern deposition accuracy.SOLUTION: A mask 100 for film formation includes: a pattern opening 110 having a strip-shaped bus bar opening 110b corresponding to a bus bar part at a comb-shaped pattern and a plurality of strip-shaped finger openings 110f corresponding to a plurality of finger parts at the pattern, respectively; a frame part 120 that surrounds the pattern opening 110 and that comprises a first frame side part and a second frame side part sandwiching the pattern opening 110 therebetween and a third frame side part and a fourth frame side part sandwiching the pattern opening 110 therebetween; a plurality of strip-shaped finger mask parts 130 which are each arranged between the finger openings 110f adjacent to each other and extend from the third frame side part toward the respective bus bar openings; and a joint part 140 which, in a part of the pattern opening 110, joints each of the finger mask parts 130 to at least one of the frame part 120 and the adjacent finger mask part 130.SELECTED DRAWING: Figure 4A

To provide a solar cell and its manufacturing method, a photovoltaic module, and a photovoltaic system.SOLUTION: A solar cell includes: a base substrate including a first surface and a second surface arranged oppositely, and a plurality of adjacent side faces between the first surface and the second surface; a dope conductive layer and a first passivation film layer sequentially installed in lamination on the first surface to cover only the first surface; an antireflection film layer installed in lamination on the first passivation film layer and for covering the first surface so as to cover at least the first passivation film layer; a passivation contact layer provided on the second surface; and a second passivation film layer installed in lamination on the passivation contact layer and for covering the second surface so as to cover at least the passivation contact layer. The antireflection film layer covers at least a portion of each side face, or the second passivation film layer covers at least a portion of each side face.SELECTED DRAWING: Figure 1

This application provides a method for fabricating a solar cell and a solar cell. The method includes: forming a composite sacrificial layer on the surface of a solar cell substrate; forming an ink mask on the side of the composite sacrificial layer facing away from the solar cell substrate, the ink mask comprising microcapsules, each microcapsule comprising a wall and a core, the wall material comprising polylactic acid-glycolic acid copolymer, and the core material comprising sodium bicarbonate; patterning the ink mask and composite sacrificial layer using a laser processing technique to form a target pattern matching grid lines, thereby exposing a portion of the solar cell substrate; the composite sacrificial layer serving to buffer stress generated by the laser and absorb laser light during subsequent fabrication; forming grid lines on the exposed solar cell substrate; and removing the ink mask and composite sacrificial layer. This application solves the problem of poor quality solar cells obtained by existing solar cell fabrication methods.

To provide a method for manufacturing a solar cell, which can appropriately determine the end point of heat treatment and manufacture a solar cell having high photoelectric conversion efficiency.SOLUTION: The method for manufacturing the solar cell according to one aspect of the present invention is a method for manufacturing a solar cell that includes a semiconductor substrate having a first conductivity type, a plurality of first semiconductor layers which have the first conductivity type and are separately stacked on one main surface of the semiconductor substrate, a second semiconductor layer which is stacked on the semiconductor substrate complementarily to the first semiconductor layers, a plurality of first transparent electrode layers which are respectively stacked on the first semiconductor layers, a second transparent electrode layer which is stacked on the second semiconductor layer, a plurality of first metal electrodes which are respectively stacked on the first transparent electrode layers, and a second metal electrode which is stacked on the second transparent electrode layer. The method includes a step of heat-treating an intermediate product which has the first semiconductor layer, the second semiconductor layer, the first transparent electrode layer, the second transparent electrode layer, the first metal electrode and the second metal electrode stacked on the semiconductor substrate; and determines the end of the heat treatment on the basis of electrical resistances between the plurality of first metal electrodes.SELECTED DRAWING: Figure 3

The invention, which relates to a liquid-carrying roller for wet etching and a wet etching method, belongs to the technical field of solar cell manufacturing, and solves the problem of abnormal roller levelness in a process of manufacturing a solar cell in the prior art. The liquid-carrying roller for wet etching of the invention comprises a first end shaft, a second end shaft, and a liquid-carrying shaft, the first end shaft and the second end shaft being located at both ends of the liquid-carrying shaft, respectively, the first end shaft, the second end shaft and the liquid-carrying shaft being arranged concentrically, and the diameters of the first end shaft and the second end shaft being both adjustable.

A solar cell manufacturing apparatus according to an embodiment of the present invention comprises: a plurality of stages which are arranged in a row and are in contact with each other, and on which solar cells are mounted; a base unit for supporting the plurality of stages and transferring the plurality of stages to the curing zone; a transfer unit for transferring the plurality of stages to a curing zone; a transfer unit for transferring the plurality of stages to a curing zone; and a pin supply unit disposed on one side of the base unit and supplying a pin between predetermined adjacent two stages among the plurality of stages, in which the two stages coupled to the pin supplied by the pin supply unit are spaced apart from each other.

The present invention provides a method for manufacturing a solar cell, comprising: a step of first patterning the periphery of one surface of a substrate so as to form a groove; a step of forming a thin film layer on one surface or the other surface of the substrate; and a step of cutting the periphery of the substrate along the groove.