88 results about "Solar cell fabrication" patented technology

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 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 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 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.

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.

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.

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.

The invention discloses a monocrystalline silicon surface secondary texturing process for solar cell manufacturing, and belongs to the technical field of solar cell manufacturing. According to the process, a two-step method of'primary texturing and secondary texturing 'is adopted, and after a pyramid-shaped basic structure is formed through primary texturing, a texturing solution with a specific formula is adopted for secondary modification. The primary texturing parameters are as follows: treatment is performed for 280 seconds in a solution containing 685 L of a DI aqueous solution, 8.5 L of a NaOH solution and 2.2 L of an ADD2 solution at 65 DEG C; the secondary texturing parameters are as follows: at 82 DEG C, treatment is carried out for 420 seconds in a solution containing 690L of a DI aqueous solution, 0.7 L of a NaOH solution and 12,000 ml of HDI, the initial alkali preparation amount is 1 L more than that of a conventional process, and the total time is shortened by 40 seconds. Experiments show that the technology enables the reflectivity of the silicon wafer to be reduced by 0.5%-0.8%, the photoelectric conversion efficiency of the cell to be improved by 0.045%, the current to be obviously improved, and the technology is suitable for efficient solar cell production.

The application relates to the field of solar cell manufacturing, and particularly discloses a TOPCon cell and a preparation method thereof. A front surface oxidation layer is obtained by front surface oxidation of a silicon substrate; a back surface oxidation layer and a polysilicon layer are sequentially arranged on the back surface of the silicon substrate; a SE area of the front surface oxidation layer is laser grooved to obtain a diffusion precursor, grooves on the front surface of the diffusion precursor penetrate the front surface oxidation layer; boron diffusion is performed on the front surface of the diffusion precursor to obtain a cell precursor; after back surface phosphorus diffusion, surface passivation and electrode arrangement are performed on the cell precursor, the TOPCon cell is obtained. The TOPCon cell is produced by only one diffusion, so that the process flow is simplified, the service life of a reaction furnace is greatly prolonged, the demand for boron diffusion reagents in the production process is reduced, and the production cost is greatly reduced.

The utility model relates to a slow lifting device, a texturing system and a solar cell manufacturing production line. The slow lifting device comprises a slow lifting assembly, the slow lifting assembly comprises a slow lifting main body and a slow lifting auxiliary body, the slow lifting main body is provided with a slow lifting main groove, the slow lifting auxiliary body is provided with a slow lifting auxiliary groove, and the slow lifting main groove is communicated with the slow lifting auxiliary groove; the preheating pipe assembly is installed on the slow lifting accessory body, at least part of the preheating pipe assembly is located in the slow lifting auxiliary groove, the preheating pipe assembly is communicated between the cold water source and the water inlet end of the water heater, and the water outlet end of the water heater is communicated with the slow lifting main groove. According to the slow lifting device, the texturing system and the solar cell manufacturing production line provided by the invention, the energy consumption can be reduced.

The present invention provides solar cells, methods for manufacturing the same, stacked cells, and photovoltaic power generation assemblies. [Solution] The solar cell includes a cell substrate having a first surface and a second surface facing away from each other, and a plurality of grid lines located on the first surface and / or the second surface and arranged at intervals in the first direction, which are electrically connected to the cell substrate and include a contact structure and a connecting layer, wherein the contact structure includes a plurality of contact portions, and the connecting layer is a long structure extending in the second direction, wherein the contact portions include first contact portions and second contact portions arranged alternately in the second direction, and the connecting layer has first side portions and second side portions facing away from each other in the first direction, wherein the first contact portions are connected in contact with at least the first side portions and the second contact portions are connected in contact with the second side portions, or the second contact portions are connected in contact with at least the second side portions and the first contact portions are connected in contact with the first side portions.

A solar cell manufacturing apparatus according to an embodiment of the present invention comprises: a first base unit on which a stage on which a solar cell is mounted is disposed and conveyed; a second base unit which is disposed on a lower side of the first base unit and conveys the stage supplied from the first base unit; a first stage lifting unit connected to the other end of the first base unit and one end of the second base unit, and transferring a stage provided on the first base unit to the second base unit; a second stage lifting unit; and a second stage lifting unit connected to one end of the first base unit and the other end of the second base unit, and transferring a stage provided on the second base unit to the first base unit. The stage circulates on the first base unit and the second base unit.

A solar cell manufacturing apparatus according to an embodiment of the present invention comprises: a base unit that conveys and supports a stage on which a solar cell is mounted; and a curing unit disposed on an upper portion of the base unit and formed to have a hollow portion having an open lower portion to cover a part of the upper portion of the base unit. The base unit includes a first heater disposed on the upper surface portion. The curing unit includes a second heater disposed on the inner top portion. A stage on which a solar cell is mounted is transferred between the first heater and the second heater, and a first length of the first heater may be longer than a second length of the second heater.

The invention discloses chained water film equipment for manufacturing a solar cell and a method for reducing HF consumption, and relates to the technical field of solar cell manufacturing, and the chained water film equipment comprises a spraying chamber, a conveying roller assembly, a spraying assembly, a water tank, a temperature control part and an acquisition assembly. Comprising the following steps: spraying water film liquid in a preset temperature range on the surface of a silicon wafer by using the chain type water film equipment for manufacturing the solar cell, so that the water film liquid covers the surface of the silicon wafer to form a water film, then transporting the silicon wafer with the water film formed on the surface to an etching chamber, and etching the other surface of the silicon wafer; the preset temperature range is 40-50 DEG C; the chain type water film equipment sprays 40-50 DEG C water film liquid to the surface of a silicon wafer, so that a water film is formed on the surface of the silicon wafer, the surface tension of the silicon wafer and the reaction activity of etching tank liquid medicine can be improved, the HF use cost is greatly reduced, and the fluorine ion-containing wastewater treatment cost and the environmental protection risk caused by fluorine-containing wastewater treatment are reduced.

The application relates to a deposition device, a deposition system and a solar cell manufacturing production line. The deposition device comprises a deposition main body with a gas inlet, a reaction chamber and a gas outlet connected in sequence; and a heat exchange assembly located in the reaction chamber. The heat exchange assembly comprises at least one heat exchange plate. All the heat exchange plates are arranged close to the gas outlet. The projection of the area defined by the outer contour of the heat exchange plate in the direction of the central axis of the gas outlet covers at least part of the gas outlet. The heat exchange plate has multiple groups of gas passing holes arranged in sequence along the direction of the central axis pointing to the outer edge. In the two adjacent groups of gas passing holes, the outer group of gas passing holes is arranged around the outer periphery of the inner group of gas passing holes. Each group of gas passing holes comprises a plurality of gas passing holes arranged along the circumferential direction. The deposition device, the deposition system and the solar cell manufacturing production line can reduce the defective rate of the battery piece.

The utility model relates to an adsorption assembly, an adsorption device and a solar cell manufacturing production line. The adsorption assembly comprises a support, the support comprises a first support body and a protrusion, the width of the first support body is L, the L is larger than or equal to 3 mm and smaller than or equal to 5 mm, the protrusion protrudes out of the side, arranged in the thickness direction of the first support body, of the first support body, and the orthographic projection of the protrusion in the thickness direction of the first support body completely falls into the surface, facing the protrusion, of the first support body; the suction nozzle is sleeved and fixed outside the bulge; the first frame body, the protrusion and the suction nozzle are communicated in sequence. According to the adsorption assembly, the adsorption device and the solar cell manufacturing production line provided by the invention, the abnormal condition during the electrical performance test of the cell can be reduced.

The application discloses a TOPCon solar cell edge coating and passivation treatment device and process, relates to the technical field of solar cell manufacturing, and aims to solve the technical problem of poor passivation effect of the side edge of a solar cell after cutting in the stacking mode of the solar cell by adopting ALD, and comprises a reaction tank body, a base, a laminating mechanism and a functional mechanism. The solar cell is placed in the gap between two partitions, the sealing gasket A is used for isolating the passivation gas, the surface of the solar cell is protected, the gas groove, the corresponding two sealing gaskets A and the surface of the solar cell jointly form a protection gas cavity, the protection gas is introduced into the protection gas cavity, the gas curtain isolation layer in the protection gas cavity further protects the surface of the solar cell, the passivation gas is limited in the cutting area, the gas curtain isolation layer reduces the extrusion contact requirement of the sealing gasket A and the solar cell, and thus the damage of the solar cell is reduced.

The utility model relates to the technical field of solar cell manufacturing, in particular to a leaked liquid collecting device and groove type cleaning equipment, the leaked liquid collecting device comprises a collecting main body and a spraying part, the collecting main body is provided with a first collecting cavity, the first collecting cavity is used for collecting leaked liquid of a cleaning groove, and a collecting hole is formed in the bottom wall forming the first collecting cavity; the spraying part is arranged in the collecting main body, and the spraying part is used for flushing leaked liquid in the first collecting cavity into the collecting holes by spraying liquid; and the collecting hole is used for being communicated with a recycling box, and the collecting hole is used for guiding leaked liquid in the first collecting cavity into the recycling box. The device can have the following advantages that when the cleaning tank leaks, leaked liquid can flow into the first collecting cavity, then through the flushing effect of the spraying part, the leaked liquid is rapidly collected into the recycling box through the collecting holes, consumption of manual treatment resources is reduced, and leaked liquid recycling is safer, more convenient and faster.

A preparation method of a back contact battery assembly belongs to the field of solar battery preparation, and is characterized in that a first welding area is formed by arranging a feature structure on a communication part of a bus bar and a welding strip; the bus bar comprises an access side bus bar which is accessed into the junction box; a second welding area is arranged at the joint of the access side bus bar and the junction box; and after lamination, welding the junction box and the second welding area to obtain the back contact battery assembly. The characteristic structure is constructed on the bus bar to form the first welding area, the characteristic structure enables each welding point to move independently so as to release stress generated by thermal expansion and cold contraction of the welding points, a bus bar body is prevented from being stressed, and the situation that the welding points are unsoldered is avoided; the bus bar is made of a copper-aluminum composite material or aluminum, so that the cost is reduced; by folding the outgoing line of the access side bus bar, the thickness of the outgoing line is increased, the total sectional area of the bus bar is increased, the resistance on the outgoing line of the bus bar can be effectively reduced, and further, the heat loss is reduced, and the power of the assembly is improved.

A solar cell manufacturing method according to this embodiment includes: forming a second photoelectric conversion portion including a semiconductor substrate, a first semiconductor layer on one side of the semiconductor substrate, and a second semiconductor layer having a different conductivity type from the first semiconductor layer on the other side of the semiconductor substrate; forming a junction layer on the first semiconductor layer; changing a surface property of a front surface of the junction layer; forming a first photoelectric conversion portion including a photoelectric conversion layer including a perovskite compound on the front surface of the junction layer; and forming a first electrode electrically connected to the first photoelectric conversion portion on one side of the first photoelectric conversion portion and a second electrode electrically connected to the second photoelectric conversion portion on the other side of the second photoelectric conversion portion. Therefore, in a tandem structure provided with the first photoelectric conversion portion including the perovskite compound and the second photoelectric conversion portion including the semiconductor substrate, an adhesion property can be improved by changing the junction layer between the first photoelectric conversion portion and the second photoelectric conversion portion to hydrophilicity.

The application relates to a printing system and a solar cell manufacturing production line. The printing system has a first shooting station, a second shooting station and a printing station. The printing system comprises a position acquisition device, a transfer device and a printing device. The position acquisition device is used for shooting the position of a printing pattern on a screen plate located at the first shooting station. The transfer device is used for transferring a cell between the second shooting station and the printing station. The printing device is used for shooting the position of the cell located at the second shooting station. The printing device is used for driving the screen plate installed thereon to move according to the position of the printing pattern on the first shooting station and the position of the cell at the second shooting station, so that the printing pattern of the screen plate installed thereon is aligned with the cell located at the printing station. The printing system and the solar cell manufacturing production line provided by the application can improve the production capacity of the production line.

This invention provides a double-layer interface-free light-trapping coating and its preparation method, as well as a battery module and manufacturing method, relating to the field of solar cell manufacturing technology. The method includes: printing a substrate layer; pre-curing; printing a structural layer; and main curing. In the prepared double-layer interface-free light-trapping coating, the substrate layer is printed using UV ink with a predetermined refractive index, providing optical anti-reflection and anti-reflection properties. The structural layer has a three-dimensional structure, providing excellent light-trapping effects. Simultaneously, the structural layer is also printed using UV ink with the same refractive index as the substrate layer, and the substrate layer and structural layer have an integrated, interface-free structure, effectively combining the anti-reflection and anti-reflection properties of the substrate layer with the light-trapping properties of the structural layer, achieving a dual effect of "anti-reflection" and "light-trapping." This effectively improves the power output of solar cell modules and has advantages such as high precision, stable structure, simple preparation process, short process, and low equipment investment.

The utility model discloses a solar cell, which relates to the technical field of solar cell manufacture, and comprises a silicon substrate and an anti-reflection layer arranged on at least one side of the thickness direction of the silicon substrate. The anti-reflection layer comprises a plurality of transmission grating layers which are arranged in a stacked mode. Each transmission grating layer comprises a plurality of parallel light-transmitting slits which are distributed at intervals; the extending directions of the light-transmitting slits of the multiple transmission grating layers are different. According to the embodiment, the anti-reflection layer is arranged to be of the stacked structure of the multiple transmission grating layers with the light-transmitting slits extending in the different directions, so that the nanometer Moire grating structure jointly formed by the multiple transmission grating layers can effectively improve the light transmission performance, and the nanometer Moire grating structure is particularly suitable for an anti-reflection material with the refractive index lower than that of a silicon substrate; the light reflection can be better reduced while the good passivation performance of the material is utilized.

This invention provides a method for manufacturing a perovskite solar cell having a photoelectric conversion layer that does not have pinholes. [Solution] A method for manufacturing a solar cell having a photoelectric conversion layer containing a perovskite compound comprises, in this order, applying a precursor solution of the perovskite compound to a coating surface to form a coating, blowing an inert gas with a flow rate of 40 m / s or more perpendicularly onto the coating which is heated to 35°C to 45°C, and drying the coating by heating to form the photoelectric conversion layer.

The application 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; first step of texturing: the silicon wafer is placed in an alkali solution containing additive A, and a basic pyramid suede is formed through reaction; water washing; second step of modification: the silicon wafer is placed in an alkali solution containing additive B, and a tower body step structure and a nano pit are formed through reaction; post-treatment; the additive A and the additive B are different chemical system heterologous additives; and the temperature of the first step of texturing is higher than the temperature of the second step of modification. The application first constructs a high-density basic pyramid suede, then performs directional etching on the tower body, and simultaneously forms a step-shaped laminated surface and a surface nano pit array, so that the comprehensive performance of the solar cell is improved.

To provide a back contact solar cell having a high open circuit voltage and high photoelectric conversion efficiency by reducing interface defects and carrier recombination in a heterojunction region of a backlight surface, and to provide a manufacturing method and a cell assembly.SOLUTION: The backlight side includes first polarity regions A and second polarity regions B that are alternately arranged along a first direction D1, the light-receiving side is a textured side, surfaces of the first polarity regions A and the second polarity regions B are polished sides, and the first polarity structure is disposed in the first polarity region A; The first polarity structure includes a first functional layer 2 and a first electrode structure that are stacked in a direction away from the semiconductor substrate 1, the second polarity structure is arranged in the second polarity region B, and the second polarity structure includes a second functional layer 5 and a second electrode structure that are stacked in the direction away from the semiconductor substrate 1.SELECTED DRAWING: Figure 1

This application provides a metal electrode, a crystalline silicon solar cell, and a fabrication method thereof, relating to the field of crystalline silicon solar cell manufacturing technology. The metal electrode fabrication method mainly involves coating a positive photoresist onto the surface of a substrate, shaping and photolithographically forming grooves corresponding to the pattern; using magnetron sputtering or reactive plasma deposition technology, a seed layer and a copper electrode are sequentially formed within the grooves, with the total height of the seed layer and the copper electrode being lower than the height of the positive photoresist layer. The crystalline silicon solar cell fabrication method mainly involves forming front and back metal electrodes using the metal electrode fabrication method described above; coating negative photoresist onto the front and back metal electrodes respectively, and removing the positive photoresist layer; forming an anti-reflection film and a passivation film on the front and back of the silicon substrate, and removing the negative photoresist layer. The metal electrode fabrication method, the crystalline silicon solar cell, and the fabrication method thereof result in excellent electrode quality, high aspect ratio, and high cell efficiency.

This invention discloses a GaAs / PEDOT:PSS@CNT heterojunction solar cell with an electron transport layer and its fabrication method. The cell structure, from bottom to top, consists of a back electrode, an electron transport layer, a GaAs substrate, a PEDOT@CNT layer, and a top electrode. The fabrication method involves depositing a ZnO electron transport layer on the back side of the GaAs substrate using electron beam evaporation, followed by depositing an Au layer on the deposited ZnO as the back electrode. A PEDOT:PSS@CNT thin film is then fabricated on the surface of the GaAs substrate, followed by depositing one or more composite electrodes selected from Ag, Cr, Ti, Ni, and Au on the PEDOT:PSS@CNT thin film. This invention's solar cell fabrication method is not only simple and low-cost, but also utilizes the band structure characteristics of ZnO as the electron transport layer and PEDOT@CNT as a composite hole transport layer to improve device performance, which is beneficial for promoting the market development of GaAs-based solar cells.