396 results about "Silicon cell" patented technology

The invention provides a perovskite laminated photovoltaic cell assembly and a preparation method thereof, the perovskite laminated photovoltaic cell assembly comprises a plurality of first battery packs connected in parallel, each first battery pack comprises a plurality of laminated cells connected in series, and each laminated cell comprises a perovskite cell and a crystalline silicon cell which are stacked; a first light absorption layer and a first hole transport layer of the perovskite cell are etched by P2 laser to form a plurality of perovskite sub-cells which are connected in parallel, and the perovskite cell is used for absorbing short-wavelength light in front sunlight; the second hole transport layer and the intermediate electrode layer of the crystalline silicon cell are etched by P1 laser to form a plurality of crystalline silicon sub-cells which are connected in parallel, the perovskite cell is used for absorbing long-wavelength light in front sunlight, and the absolute value of the difference between the current density of the perovskite cell and the current density of the crystalline silicon cell is smaller than or equal to a first preset value. According to the laminated battery piece, the current density consistency of the perovskite battery and the crystalline silicon battery in the laminated battery piece is high, the electrical loss can be reduced, and the power generation efficiency can be improved.

The invention provides a perovskite-crystalline silicon laminated cell, which comprises a heterogeneous crystalline silicon cell, a tunnel junction, a conductive layer, a first carrier transport layer, a perovskite light absorption layer, a second carrier transport layer and a transparent electrode layer which are sequentially laminated, wherein the first carrier transport layer comprises a dendritic structure facing and extending into the perovskite light absorption layer, and the length of the dendritic structure is smaller than the thickness of the perovskite light absorption layer. According to the perovskite-crystalline silicon laminated cell provided by the invention, through the arrangement of the dendritic structure with a relatively good capillary effect in the first carrier transport layer, a high-quality perovskite absorption layer can be formed, so that the energy conversion efficiency of the perovskite-crystalline silicon laminated solar cell is greatly improved.

The invention belongs to the technical field of rare and precious metal recovery, and particularly relates to a method for recovering metallic silver from waste crystalline silicon battery pieces, which comprises the following steps: (1) putting the waste crystalline silicon battery pieces into an inorganic alkali aqueous solution for soaking reaction to obtain an aluminum-containing solution and dealuminized crystalline silicon pieces; (2) adding the dealuminized crystal silicon wafer into a mixed solution of organic acid and hydrogen peroxide for soaking reaction, filtering and washing to respectively obtain silver-containing filtrate and a silver-removed silicon wafer; (3) carrying out chlorination precipitation reaction on the silver-containing filtrate and a chlorine source, filtering and drying to obtain silver chloride powder; (4) adding silver chloride powder into an ammonia water solution, heating and stirring to completely dissolve silver chloride to obtain a silver-ammonia solution; (5) adding PVP (Polyvinyl Pyrrolidone) into the silver-ammonia solution, heating and stirring until the PVP is completely dissolved, adding ascorbic acid, and carrying out reduction reaction at room temperature to obtain metal silver powder precipitate; and filtering, washing and drying the precipitate to obtain the spherical silver powder. According to the method, the silver recovery efficiency is high, the spherical nanoscale silver powder can be prepared, and the purity is high.

The invention provides a method for synergistically recovering all elements of crystal silicon cells of a decommissioned photovoltaic module, which comprises the following steps of: collecting large-particle waste crystal silicon cells and grinding the large-particle waste crystal silicon cells to obtain powder; the powder is leached with nitric acid, and leach liquor and impurity-removed silicon powder are obtained; leaching the silicon powder subjected to impurity removal by using an HF solution to remove a silicon nitride layer, and filtering, washing and drying to obtain the silicon powder meeting the industrial standard; the leaching solution is subjected to chlorination precipitation to obtain silver chloride and a leaching solution with silver removed, and after the silver chloride is filtered, the silver chloride is subjected to acid pickling and water washing to obtain silver chloride; sodium sulfide is added into the leaching solution after silver removal, metal in the leaching solution is precipitated, and a solution containing Al < 3 + > can be obtained after filtering; the method comprises the following steps: adding an alkaline substance into a solution containing Al < 3 + >, filtering to obtain an aluminum hydroxide precipitate, and washing the aluminum hydroxide precipitate to remove foreign ions adsorbed on the surface; one technical effect of the invention is that collaborative recovery and treatment of each element in the waste crystal silicon battery piece are realized.

The invention discloses a method for recovering a silicon wafer and precious metal silver in a decommissioned crystalline silicon photovoltaic panel, which comprises the following steps of: 1, mechanically disassembling and pyrolyzing the decommissioned photovoltaic panel to obtain a crystalline silicon battery piece; 2, preparing molten salt, and heating the molten salt to melt the salt; and step 3, placing the crystalline silicon cell in molten salt, carrying out selective etching separation, taking out the crystalline silicon cell after etching is finished, and washing with water to obtain a silicon wafer and a silver wire. According to the method, the melting temperature of the used fused salt is low, silver and silicon in the photovoltaic panel can be separated in a targeted mode, the fused salt does not react with substrate silicon and silver wires on the surface, the high recovery efficiency of silver and silicon is guaranteed, meanwhile, environmental pollution caused by silver and silicon in the recovery process is reduced, on the basis, silver and silicon can be obtained through one-step separation and recovery, and the method is suitable for industrial production. The method has the advantages of simple operation, short process, environmental friendliness and the like.

The invention belongs to the technical field of solar cells, and relates to a perovskite laminated cell and a preparation method thereof, the perovskite laminated cell can reduce light parasitic absorption, the perovskite laminated cell comprises a bottom crystalline silicon cell, the bottom crystalline silicon cell comprises a substrate, the substrate comprises a first surface and a second surface which are opposite to each other, a first tunneling oxide layer and a first composite passivation layer are sequentially arranged on the first surface in the direction perpendicular to and away from the first surface, and the first composite passivation layer comprises first doped crystalline silicon conductive regions and first wide-band gap conductive regions which are alternately arranged in the direction parallel to the first surface; the top perovskite cell is arranged on the first composite passivation layer and is electrically connected with the bottom crystalline silicon cell, and the top perovskite cell comprises a hole transport layer, a perovskite active absorption layer, an electron transport layer, an interface buffer layer, a transparent conductive layer and an anti-reflection layer which are sequentially far away from the first composite passivation layer; and a first electrode in electrical contact with the transparent conductive layer.

The invention provides a waste photovoltaic module high-value recovery process based on pyrolysis and wet purification, which comprises the following steps: carrying out pyrolysis decarburization on a waste photovoltaic module to obtain a glass plate, a crystalline silicon battery piece and a copper-tin soldering strip; the method comprises the following steps of: performing alkaline leaching on a crystal silicon cell to obtain a dealuminized crystal silicon wafer, performing acid pickling on the dealuminized crystal silicon wafer to obtain a silver-removed crystal silicon wafer and a silver leaching solution, and extracting a silver elementary substance from the silver leaching solution; removing impurities from the silver-removed crystal silicon wafer through a hydrofluoric acid solution to obtain a high-purity crystal silicon wafer; recovering a copper strip from the copper-tin soldering strip through a high-temperature smelting reduction method; after fluorine-containing pyrolysis gas generated in the pyrolysis process is subjected to combustion and heat exchange, hydrogen fluoride is removed in a two-stage alkali liquor absorption mode, then washing is conducted, and finally obtained flue gas is discharged. According to the wet purification process, the waste crystalline silicon battery piece can be subjected to high-purity recovery, and the crystalline silicon piece, silver and copper with high purity can be obtained. The hydrogen fluoride is removed by adopting a two-stage alkali liquor absorption method, so that the treatment efficiency of the hydrogen fluoride in the pyrolysis gas is improved.

The invention discloses photovoltaic module broken glass recovery processing equipment and method. The recovery processing equipment is used for firstly dismantling a frame, a wire box and a cable on a photovoltaic module to obtain a frameless photovoltaic module; grinding and removing a fluorine-containing back plate on the rear side of the frameless photovoltaic module to obtain a laminated part; stripping and sorting the obtained laminated piece to obtain a pure broken glass product, an EVA (Ethylene Vinyl Acetate) battery layer and glass containing EVA impurities; cutting the EVA battery layer into small pieces; carrying out pyrolysis on the EVA battery layer in the small piece state and the glass containing the EVA impurities, and removing the organic matter glue layer to obtain a mixture of the glass, the welding strip and the silicon battery piece; and sorting the mixture into a plurality of different states, and sorting the mixture in different states to obtain pure glass, a welding strip and a silicon battery piece. According to the photovoltaic module broken glass recovery method provided by the invention, the loss of each material of the module in the recovery process is relatively low, valuable materials are fully recycled, and the recovery period is shortened.

The invention discloses a novel device and method for intelligently disassembling a waste photovoltaic silicon cell panel. The device comprises two layers of transmission rollers and a conveying belt penetrating through the two layers of transmission rollers. The main control board is integrated with a fuzzy controller and a PID (Proportion Integration Differentiation) controller, a hierarchical decision algorithm and a BP (Back Propagation) neural network are deployed on the main control board, the PID controller is connected with the fuzzy controller, and the BP neural network is used for dynamically adjusting PID parameters of the PID controller; the support is fixedly provided with a six-axis servo motor, a back plate collecting bin, an air cooling fan and a copper solder strip absorbing device, the six-axis servo motor is fixedly connected with a vacuum suction cup array, the air cooling fan is fixedly provided with an infrared imager, and the support is provided with a double-layer heat cutter head. A resistance heating module and an electromagnetic induction heating module are nested on the outer surface of the double-layer hot cutter head, and a pressure sensor, a laser sensor and a temperature sensor which are fixedly connected with the main control board are fixedly arranged on the outer surface of the double-layer hot cutter head. According to the invention, the waste photovoltaic silicon cell panel can be intelligently and accurately segmented, the dependence on manpower is reduced, and high-quality recovery of the silicon cell panel is realized.

The invention relates to a texturing method of a silicon wafer and a textured silicon wafer, and the texturing method comprises the steps: forming a pyramid textured surface on the silicon wafer, then carrying out the rounding treatment to form a rounded textured surface, and then forming pits in the rounded textured surface, thereby completing the texturing. Wherein the rounding treatment comprises the following steps: sequentially carrying out first treatment and second treatment in a first mixed solution and a second mixed solution, the first treatment and the second treatment form a cycle, at least two cycles are carried out, the first mixed solution comprises HNO3 and HF, the mass fraction of HNO3 is greater than that of HF, the second mixed solution comprises HNO3 and HF, the mass fraction of HNO3 is greater than that of HF, the mass fraction of HNO3 is greater than that of HF, and the mass fraction of HF is greater than that of HF. The mass fraction of HNO3 is smaller than that of HF, the time of the first treatment is longer than that of the second treatment, the number of the obtained pits is 10-100 / cm < 2 >, the width is 0.01-0.08 mu m, and the depth is 5-50 nm. The invention further provides a crystalline silicon cell and a preparation method thereof, and in the preparation method of the crystalline silicon cell, the conversion efficiency of the crystalline silicon cell can be effectively improved by adopting the texturing method.

The invention relates to the technical field of solar cells, and discloses a laminated cell and a preparation method thereof, and the laminated cell comprises a perovskite cell structure, a first composite layer, a second composite layer and a crystalline silicon cell structure which are sequentially laminated from a light receiving surface to a backlight surface. The doping concentration of the conductive impurities in the first composite layer is gradually increased in a gradient manner along the direction from the perovskite cell structure to the second composite layer; and the doping concentration of the conductive impurities in the second composite layer is gradually reduced in a gradient manner along the direction from the first composite layer to the crystalline silicon cell structure. The part with the relatively high doping concentration of the conductive impurities maximizes the transmission efficiency of current carriers and reduces the recombination loss, and the part with the relatively low doping concentration of the conductive impurities reduces the recombination loss of interface joints, so that the overall performance of the laminated cell is improved.

The invention relates to a process method for separating out-of-service photovoltaic modules, and belongs to the field of organic chemical industry and the field of efficient recycling of secondary resources. The method comprises the following steps: placing the retired photovoltaic module and an organic solvent containing diethylene glycol monobutyl ether in a dynamic fluid circulation system for layering treatment; the dynamic fluid circulation system controls the organic solvent to circularly flow on the surface of the decommissioned photovoltaic module to complete layering of the decommissioned photovoltaic module, and waste liquid and solids are obtained through solid-liquid separation; the solid object contains glass, a crystalline silicon battery piece and a back plate. According to the method, an appropriate solvent is selected and a flow field is optimized, so that efficient layering of an EVA packaging layer and stripping of a photovoltaic module are realized, and complete recovery of glass, a crystalline silicon battery piece and a back plate is ensured.

The present invention discloses a two-terminal perovskite-silicon tandem cell and a preparation method thereof, which are applied to the technical field of perovskite solar cells. The two-terminal perovskite-silicon tandem cell includes a tandem cell sheet, and the tandem cell sheet includes a perovskite cell structure for absorbing visible light and a silicon cell structure for absorbing near-infrared light. A near-infrared light conversion layer is provided on the light-incident side surface of the two-terminal perovskite-silicon tandem cell, and the near-infrared light conversion layer is a down-conversion thin film. By converting the short wave in sunlight into a long wave through the near-infrared light conversion layer, the problem of current mismatch caused by the two-terminal perovskite-silicon tandem cell under the illumination condition with a relatively high proportion of visible light is solved, so that the two-terminal perovskite-silicon tandem cell has high performance.

The invention discloses a method for recycling EVA and silver of a waste photovoltaic panel laminated piece, which comprises the following steps: S1, removing an aluminum frame and a junction box, and stripping a back plate; s2, EVA on the back of the laminated part is removed; s3, EVA on the front face of the laminated piece is removed; and S4, recovering the silver electrode of the silicon battery piece. The invention provides the method for accurately controlling the EVA (Ethylene Vinyl Acetate) at the front part and the back part of the photovoltaic laminated piece to be cleanly and quickly separated and separating the silver electrode on the silicon battery piece by using laser as a main process, chemical reagents are not needed in the whole process, crushing and sorting are not needed, and the silver with high additional value and the complete silicon battery piece are obtained; the method has the characteristic of efficient and accurate utilization of energy. According to the method, the non-destructive rapid recovery of EVA is realized, and meanwhile, a silver recovery method with low environmental influence is adopted, so that great convenience is provided for subsequent efficient remanufacturing, and considerable circular economic benefits can be brought.

The invention relates to a silicon-calcium laminated solar cell and a preparation method thereof, the silicon-calcium laminated solar cell comprises a silicon cell serving as a bottom cell and a perovskite cell serving as a top cell, the perovskite cell is a p-i-n type cell, the silicon cell is connected with the perovskite cell through a tunneling structure, and the silicon cell is connected with the perovskite cell through a tunneling structure. The tunneling structure comprises a TCO-1 layer close to the silicon cell, a TCO-2 layer close to the perovskite cell and a middle layer arranged between the TCO-1 layer and the TCO-2 layer, the TCO-1 layer is an n-type TCO, the TCO-2 layer is a p-type TCO, and the middle layer is made of a metal material. The tunneling structure layer of the laminated cell adopts a three-layer structure, so that the cell efficiency is effectively improved.

The invention provides a wet purification process suitable for silicon and precious metal of a waste photovoltaic laminated piece, which comprises the following steps of: immersing a waste crystalline silicon battery piece into a NaOH solution, and removing an aluminum wire on the surface of the crystalline silicon battery piece to obtain a dealuminized crystalline silicon piece; the dealuminated crystal silicon wafer is subjected to acid pickling, and a silver-removed crystal silicon wafer and silver leaching liquid are obtained; removing impurities from the silver-removed crystal silicon wafer through a hydrofluoric acid solution to obtain a high-purity crystal silicon wafer; and extracting the silver elementary substance from the silver leachate through a hydrazine hydrate reduction method. According to the wet purification process, the waste crystalline silicon battery piece can be subjected to high-purity recovery, and the high-purity crystalline silicon wafer and the silver elementary substance can be obtained.

The invention discloses a crystalline silicon cell module, a preparation method and a photovoltaic system, and belongs to the technical field of solar cells. The crystalline silicon battery assembly comprises a plurality of crystalline silicon battery pieces, the plurality of crystalline silicon battery pieces comprise a first crystalline silicon battery piece and a second crystalline silicon battery piece, the light facing surface of the first crystalline silicon battery piece is provided with a first connecting piece, and the backlight surface of the second crystalline silicon battery piece is provided with a second connecting piece; the first connecting piece comprises a first electrode grid line, the first electrode grid line is electrically connected with the light-facing surface of the first crystalline silicon battery piece, the second connecting piece comprises a second electrode grid line, the second electrode grid line is electrically connected with the backlight surface of the second crystalline silicon battery piece, and the first connecting piece and the second connecting piece extend in opposite directions so as to be connected with each other; and the first electrode grid line is in contact connection with the second electrode grid line. The electrode grid lines between the two crystal silicon battery pieces are directly connected, so that no welding strip is needed for connection, the shading influence caused by the welding strip can be avoided, and the power of the module is improved.

The invention belongs to the field of photovoltaic modules, and discloses a perovskite crystalline silicon laminated photovoltaic module and a preparation method thereof.The photovoltaic module comprises front plate glass, and a top cell perovskite layer, a first adhesive film layer, a bottom cell crystalline silicon cell layer, a second adhesive film layer and back plate glass are sequentially laid on one side of the front plate glass; the edges of the top cell perovskite layer, the first adhesive film layer, the bottom cell crystalline silicon cell layer and the second adhesive film layer are wrapped and sealed through a composite frame, the composite frame comprises a substrate with the wall thickness of 0.1-2mm, the surface of the substrate is provided with an anodic oxide layer with the thickness of 4-6mu m, and the surface of the anodic oxide layer is covered with a polyimide layer with the thickness of 30-1mm. The laminated photovoltaic module adopts the composite frame to replace the existing butyl rubber for sealing, so that the metalized edge sealing is perfectly fused into the low-temperature laminating process, the sealing performance is superior to that of the butyl rubber, and the service life of the laminated photovoltaic module is prolonged.

A silicon wafer texturing method and a textured silicon wafer. The texturing method comprises: forming on a silicon wafer a pyramid textured surface; then carrying out rounding treatment to form a rounded textured surface; and then forming on the rounded textured surface pits to finish the texturing, wherein the rounding treatment comprises: successively performing first treatment and second treatment in a first mixed solution and a second mixed solution, the first mixed solution comprising HNO3 and HF, the mass fraction of HNO3 being greater than the mass fraction of HF, the second mixed solution comprising HNO3 and HF, and the mass fraction of HNO3 being less than the mass fraction of HF. With regard to the obtained pits, the number is 10 / cm2-100 / cm2, the width is 0.01 μm-0.08 μm, and the depth is 5 nm-50 nm.

The utility model discloses a perovskite and crystalline silicon cell laminated structure, which comprises a bottom cell and a top cell which are laminated, the bottom cell is a crystalline silicon cell, the top cell is a perovskite cell, the crystalline silicon cell comprises a crystalline silicon substrate, a tunneling oxide layer and a doping layer, and the tunneling oxide layer and the doping layer are sequentially arranged upwards from the crystalline silicon substrate. The front surface of the tunneling oxide layer is divided into a first region and a second region, and the doping layer correspondingly covers the first region; the laminated structure further comprises a transparent conductive film layer. According to the utility model, on one hand, through regional distribution of the doping layer, a field passivation effect can be achieved, recombination is reduced, unnecessary parasitic absorption is reduced, and optical loss is effectively reduced; and on the other hand, the transparent conductive film layer is arranged, so that the crystalline silicon cell is compatible with the perovskite cell, the thickness of the doping layer can be remarkably reduced, the preparation cost of the cell is effectively reduced, in addition, efficient combined utilization of solar spectrum and superposition of open-circuit voltage are realized, and the photoelectric conversion efficiency is greatly improved.

The invention discloses a voltage-matched two-end perovskite-crystalline silicon laminated assembly and a preparation method thereof, the laminated assembly comprises a perovskite top assembly and a crystalline silicon bottom assembly, the perovskite top assembly comprises a plurality of square perovskite assemblies, the square perovskite assemblies are provided with perovskite battery pieces in a laser scribing mode, and the perovskite battery pieces are arranged on the crystalline silicon bottom assembly. The adjacent perovskite cell pieces are connected in series and in parallel, the crystalline silicon bottom assembly comprises a plurality of crystalline silicon cell pieces connected in series and in parallel, the perovskite top assembly and the crystalline silicon bottom assembly are independently stacked, and the MLPE assembly is connected to one side of the crystalline silicon bottom assembly in series and is integrally connected with the perovskite top assembly in parallel. The top assembly adopts a splicing mode, efficiency loss caused by area expansion of a single perovskite assembly is avoided, the bottom assembly adopts a high working voltage and an MLPE assembly, and when the environment temperature changes, the working voltage of the bottom cell assembly can be adjusted, so that the bottom cell assembly is matched with the top cell assembly; compared with a conventional four-end assembly, the system installation cost is reduced, and meanwhile the power generation capacity of the four-end assembly is reserved.

The invention provides a silicon / perovskite / GaInP three-junction laminated solar cell and a preparation method thereof, and belongs to the technical field of solar cells. The cell adopts a multi-layer stacked structure and sequentially comprises a GaInP cell, a transparent conductive adhesive, a perovskite top electrode, an anti-reflection layer, a transparent conductive electrode, an electron transport layer, a perovskite layer, a hole transport layer, a silicon cell and a back electrode from top to bottom. The GaInP cell is mechanically stacked and integrated with the lower perovskite / silicon cell through the transparent conductive adhesive, spectrum splitting and current matching are completed on the premise of not depending on epitaxial growth, the solar spectrum absorption range is remarkably widened, and the photon utilization rate is improved. According to the cell structure and the preparation method provided by the invention, the perovskite / silicon / gallium indium arsenide three-junction laminated solar cell which is efficient, stable and flexible and can be prepared in a large area can be realized.

The invention relates to a method for separating photovoltaic modules by adopting an external field coupling technology, and belongs to the field of organic chemical industry and the field of efficient cyclic utilization of secondary resources. The method comprises the following steps: placing the retired photovoltaic module and an organic solvent in a dynamic fluid circulation system for layering treatment, wherein a physical field is arranged outside the dynamic fluid circulation system; the dynamic fluid circulation system controls the organic solvent to circularly flow on the surface of the decommissioned photovoltaic module and complete layering of the decommissioned photovoltaic module under the action of an external physical field, and then waste liquid and solids are obtained through solid-liquid separation; the solid comprises glass, a crystalline silicon cell and a back plate; the external physical field comprises at least one of an ultrasonic field, a microwave field and an electromagnetic field. According to the method, external physical fields such as ultrasonic waves, microwaves or electromagnetic fields are introduced to cooperate with the chemical action of the organic solvent and the dynamic fluid circulation system, so that the stripping efficiency of the EVA packaging layer and the photovoltaic module is improved, complete recovery of glass, crystalline silicon battery pieces and back plates can be ensured, and meanwhile, the method is low in energy consumption and high in efficiency.

The invention belongs to the technical field of metal resource recovery and reutilization, and particularly relates to a selective recovery method for valuable metal in a retired crystalline silicon cell photovoltaic welding strip. The method comprises the following steps: disassembling a photovoltaic solder strip from a retired crystalline silicon cell, and removing impurities from the photovoltaic solder strip to obtain a clean solder strip; adding the clean welding strip into an acetic acid solution, heating and stirring to fully react, and filtering to respectively obtain filter residues, copper strips and lead-containing filtrate; adding a precipitant into the lead-containing filtrate to carry out precipitation reaction, and after the reaction is finished, carrying out solid-liquid separation, washing and drying to obtain a lead sulfate product; washing and drying filter residues to obtain a tin dioxide crude product; and washing the copper bar with absolute ethyl alcohol, and drying to obtain the metal copper bar with the purity not lower than 99.0%. The method has the advantages of high metal separation efficiency, high recovery rate, low energy consumption, low acid and alkali consumption, difficulty in causing secondary environmental pollution and the like, and provides a feasible solution for selective separation and recovery of valuable metals of retired photovoltaic modules.

The invention provides a four-terminal perovskite crystal silicon laminated battery assembly and a preparation method thereof. The four-terminal perovskite crystalline silicon laminated battery assembly comprises a perovskite battery layer and a crystalline silicon battery layer which are laminated, the perovskite cell layer comprises a plurality of perovskite cell units, any two perovskite cell units are connected in parallel, and the orthographic projection areas of any two perovskite cell units on the crystalline silicon cell layer are equal; the crystalline silicon cell layer comprises a crystalline silicon cell string, and the crystalline silicon cell string is connected in parallel with any perovskite cell unit. According to the invention, the problem in the prior art that the number of modules is difficult to select in string design in a photovoltaic power station due to current mismatch of the four-terminal perovskite crystal silicon cell laminated module is solved.

The utility model provides an electrode structure of a crystalline silicon cell. The electrode structure comprises a silicon wafer, a plurality of thin grid lines which are arranged on the surface of the silicon wafer in parallel, gradual change lines which are arranged on the surfaces of the thin grid lines, a plurality of anti-breaking grids which are respectively arranged on the surfaces of the thin grid lines, and a plurality of welding extension lines which are respectively arranged on the surfaces of the thin grid lines. According to the crystalline silicon battery electrode structure provided by the utility model, the plurality of fine grid lines are matched with the plurality of gradual change lines, the plurality of anti-breaking grids and the plurality of welding extension lines, and the design of a main grid is canceled, so that the shading area of the battery is increased, the generating capacity of the battery is increased, the cost of silver paste used for printing the main grid is reduced, and the production efficiency is improved. And the manufacturing cost of the crystalline silicon cell is reduced.

The invention provides low-temperature sintered silver-copper slurry, a perovskite laminated cell and a preparation method, and belongs to the technical field of crystalline silicon cells. The low-temperature sintered silver-copper paste comprises the following components in parts by mass: 15-30 parts of silver powder; 63-77 parts by mass of silver coated copper powder; the surface of the silver-coated copper powder is coated with acrylic acid and an oleylamine coating agent; 3-15 parts by mass of a resin; 0.2 to 2.8 parts by mass of a curing agent; 0.05 to 0.5 part by mass of a leveling agent; and 0.05 to 0.5 part by mass of a dispersant. The present disclosure achieves low temperature (llt; in addition, the silver-coated copper powder and the silver powder are mixed, the silver powder is replaced with low cost, the material cost is reduced, meanwhile, the silver-coated copper powder forms a three-dimensional conductive network at the low temperature of less than 120 DEG C through metal bonding of a silver shell and contact between particles, and the high conductivity of the electrode is ensured.

The invention relates to the technical field of crystalline silicon cells, in particular to a preparation method of a heterojunction cell and the heterojunction cell. The preparation method of the heterojunction cell comprises the following steps of performing texturing and cleaning, depositing each photovoltaic power generation functional film layer, preparing a metal electrode, removing a transparent conductive film layer in an edge region, performing smooth etching on the edge region, and preparing a passivation layer in the edge region of a silicon wafer. The heterojunction cell comprises a silicon wafer, the silicon wafer is divided into an edge area and a middle area, the surface of the edge area of the silicon wafer is a smooth surface covered with a passivation layer or a smooth textured surface, and the front face and the back face of the middle area of the silicon wafer are textured surfaces covered with photovoltaic power generation functional film layers. And the outermost layer of each photovoltaic power generation functional film layer in the middle area is a transparent conductive film layer. The transparent conductive film layer in the edge area is etched and removed, and the edge area is smoothly etched by using the reserved transparent conductive film layer as a mask, so that the preparation process of the heterojunction cell is simple and easy to realize.

[Problem] To provide a method for reusing, by a simple method, a silicon cell separated from a solar panel. [Solution] Provided is a method for recovering monocrystalline silicon or polycrystalline silicon from a solar panel, the method being characterized by: separating monocrystalline silicon or polycrystalline silicon from a waste solar panel; thereafter, washing the surface of the separated monocrystalline silicon or polycrystalline silicon with an acid; and crushing the monocrystalline silicon or polycrystalline silicon, of which the surface has been washed with an acid, to an average particle diameter of 0.5-5.0 μm in the presence of a dispersion medium containing an alcohol.

The invention provides a crystalline silicon cell and a manufacturing method thereof, the crystalline silicon cell comprises an N-type silicon substrate, a tunneling oxide layer, an N + poly layer, AIOx / SiNx, a silver metal electrode, a P + layer and an aluminum metal electrode, and the manufacturing method of the crystalline silicon cell comprises the following operation steps: S1, double-sided cleaning and texturing: adopting an N-type silicon wafer with the size of 182.2 * 183.75, cleaning and texturing the surface of the silicon wafer with alkali, and cleaning and texturing the surface of the N-type silicon wafer with the size of 182.2 * 183.75; s2, phosphorus doping is carried out, an N + layer is formed, a thin oxide layer is deposited firstly, and then phosphorus doping is completed through a low-pressure diffusion furnace. According to the crystalline silicon cell and the manufacturing method thereof, the use amount of silver paste is reduced by about 35% through texturing, phosphorus doping, laser patterning, etching alkali polishing, boron diffusion, cleaning, atomic layer deposition, front and back anti-reflection layer preparation, silk-screen printing and laser-assisted sintering and through a cell back aluminum grid line laser induction process.