128 results about "Silicon solar cell" patented technology

The invention relates to the field of silicon solar cells, and particularly discloses a back contact cell module and a photovoltaic system. The battery string comprises a first battery string and a second battery string which are adjacently arranged; the first battery string comprises a first end part battery piece and a first edge welding strip, and the second battery string comprises a second end part battery piece, a second edge welding strip and a first secondary edge welding strip; the first edge welding strip and the first secondary edge welding strip are electrically connected with the bus bar respectively; the back contact battery assembly satisfies the following relation: 1.2 (M + N) < L < 2 (M + N); l is the distance between the first edge welding strip and the first secondary edge welding strip, M is the distance between the second edge welding strip and the first secondary edge welding strip, and N is the distance between the second edge welding strip and the edge of the second end battery piece. By implementing the invention, the capacity and yield of equipment can be improved, pseudo soldering is avoided, and the reliability of the assembly is improved.

This application provides a passivation structure and its preparation method, as well as a silicon solar cell and its preparation method. The passivation structure includes a first aluminum oxide layer, a first aluminum nitride layer, a second aluminum oxide layer, and a second aluminum nitride layer stacked together. The first aluminum oxide layer directly contacts the silicon edge and repairs cutting damage and dangling bonds through chemical passivation. It adapts to the p-type silicon region with a negative fixed charge. The first aluminum nitride layer passivates the n-type silicon with a positive fixed charge. The high hydrogen content enhances defect repair, and the dense structure blocks impurities from intruding. The second aluminum oxide layer supplements the negative charge to improve the passivation effect of the p-type silicon and forms stress complementarity with the aluminum nitride layer to prevent film cracking. The second aluminum nitride layer resists stringing and lamination damage, blocks moisture and corrosion, and ensures long-term performance. This structure achieves optimal simultaneous passivation of p / n-type silicon through charge complementarity and synergistic hydrogen passivation, improving the minority carrier lifetime at the cell edge, the implicit open-circuit voltage, and the module power, and solving the pain points of incomplete passivation and poor stability.

The present application relates to a silicon solar cell. In one example, a silicon solar cell includes a silicon substrate including an antimony element; and a carrier separation layer, formed on the silicon substrate. At least some regions of the carrier separation layer on a side close to the silicon substrate have an antimony-containing layer. The antimony-containing layer includes the antimony element. A peak concentration of the antimony element in the antimony-containing layer is a1, and a1 is equal to or greater than 1E13 atoms / cm3.

The invention discloses a benzotriazole light conversion material, a preparation method and application of the benzotriazole light conversion material in preparation of a solar cell packaging film. When a light conversion packaging film formed based on the benzotriazole light conversion material is attached to an organic solar cell, a dye-sensitized solar cell, a crystalline silicon solar cell, a perovskite solar cell and a laminated cell composed of the perovskite cell and the crystalline silicon cell, the ultraviolet stability of the solar cell can be improved; and the power conversion efficiency of the solar cell can be maintained.

The application relates to the technical field of solar cells, in particular to a two-component organic carrier and a preparation method and application thereof, the organic carrier comprises A component and B component, preparation raw materials of the A component comprise a first resin base, a first solvent, a first thixotropic agent and a first auxiliary agent; preparation raw materials of the B component comprise a second resin base, a second solvent, a second thixotropic agent and a second auxiliary agent; preparation raw materials of the first resin base comprise polyvinyl butyral resin and first cellulose; and preparation raw materials of the second resin base comprise polyvinyl butyral resin and second cellulose. The prepared organic carrier is tested, the single consumption range of the organic carrier can be controlled within 20%, with the decrease of the single consumption, the machine welding tension and the aging tension are both stabilized above 3N, and the requirements of the reliability of the tension of the crystalline silicon solar cell piece can be met.

The invention belongs to the technical field of solar cells, and discloses a flexible silicon substrate-indium phosphide solar cell and a preparation method thereof. The flexible silicon-based indium phosphide solar cell comprises a lower electrode, a flexible silicon solar cell, a first transparent conductive layer, a conductive adhesive, a second transparent conductive layer and an indium phosphide solar cell which are sequentially stacked from bottom to top, an antireflection film layer and an upper electrode are arranged on the indium phosphide solar cell; the conductive adhesive is obtained by dispersing polymethyl methacrylate microspheres coated with metal on the surface into an EVA solution. Heterogeneous integration is achieved through the transparent conductive adhesive, the two-end laminated cell is formed, the device is light, thin and flexible, the defects that a traditional four-end laminated cell is rigid, heavy, large in optical loss and the like are overcome, and the solar cell has good performance.

The invention discloses a recycling system and method for a photovoltaic module, and belongs to the technical field of harmless and resource treatment of retired photovoltaic modules. The recovery processing system of the photovoltaic module comprises a pyrolyzing furnace, a wet steam oxidation furnace and a cooling furnace, a discharge port of the pyrolyzing furnace is connected with a feed port of the wet steam oxidation furnace, and a discharge port of the wet steam oxidation furnace is connected with a feed port of the cooling furnace; molten salt heating pipes are arranged in the pyrolyzing furnace in the circumferential direction. The invention further provides a photovoltaic module recycling method which comprises the following steps: conveying the photovoltaic module into the pyrolyzing furnace, and staying at 450-550 DEG C for 20-40 minutes; then the photovoltaic module enters a wet steam oxidation furnace, the temperature of water vapor is 200-250 DEG C, and the photovoltaic module stays for 20-40 min; and then the photovoltaic module enters the cooling furnace to be cooled and output. The system provided by the invention can realize separation of a large complete glass plate and a high-quality silicon battery piece.

A control method of a tandem solar cell includes: determining a P-V curve of a silicon solar cell by performing scanning for generated electric power while changing a generated voltage of the silicon solar cell at regular intervals; performing power generation control of the silicon solar cell at a maximal power point of a P-V curve; predicting an optimum power generation voltage appropriate for a perovskite solar cell using information regarding a P-V curve of the silicon solar cell; and performing power generation control of the perovskite solar cell using an optimum power generation voltage.

The invention provides aluminate dark red fluorescent powder as well as a preparation method and application thereof, and belongs to the technical field of solid luminescent materials. According to the aluminate dark red fluorescent powder, manganese is adopted to activate aluminate, the excitation spectrum coverage area is wide, the excitation range covers most of ultraviolet and blue light areas, and the emission spectrum is concentrated near 659nm. The fluorescent powder can absorb light from ultraviolet light to a blue light region in a solar spectrum, has very strong emission intensity in a dark red light region, can emit red light under the irradiation of sunlight, can improve the utilization rate of light energy, and is more favorable for promoting the photoelectric conversion efficiency of a silicon solar cell. The fluorescent powder can be prepared into a film to be compounded on the surface of a solar cell, the solar spectrum is optimized, and the energy conversion efficiency of the solar cell is improved.

The invention relates to the technical field of photovoltaic modules, and particularly discloses a tetraphenyl ethylene-benzotriazole derivative compound and application thereof in the photovoltaic field. The absorption spectrum of the tetraphenyl ethylene-benzotriazole derivative compound disclosed by the invention can be subjected to red shift to 420 nm, so that high-energy ultraviolet light can be completely absorbed; the maximum emission wavelength of a fluorescence emission spectrum is more than 440nm and even can reach 500nm, so that the light utilization level of the crystalline silicon solar cell is improved; the absolute light-emitting quantum efficiency is very high, and the converted wavelength can be better utilized by a photovoltaic device. The substituted tetraphenyl ethylene part contained in the derivative compound has AIE performance, and the fluorescence quenching effect of traditional small organic molecules in high concentration, solid state and aggregation state is avoided. The light conversion film can overcome the problem that the fluorescence quantum yield is remarkably reduced in the laminating process, the performance of the film is not affected when the phenomena of precipitation, agglomeration and the like of auxiliaries in the film occur, and the light conversion film is used for preparing a photovoltaic module.

The application discloses a resourceful treatment method of crystalline silicon solar cell pieces, which comprises the following steps: soaking the crystalline silicon solar cell pieces in a first treatment liquid to remove the metal layer on the surface of the crystalline silicon solar cell pieces, and obtaining first-stage cell pieces and a first recovery liquid; soaking the first-stage cell pieces in a second treatment liquid to remove the passivation layer and the emitter layer on the surface of the first-stage cell pieces, and obtaining second-stage cell pieces; the second treatment liquid is a mixed acid with a concentration of 26% to 33% of nitric acid and a concentration of 3% to 5% of hydrofluoric acid; and soaking the second-stage cell pieces in a third treatment liquid to remove the metal impurities on the surface of the second-stage cell pieces and recover the silicon in the crystalline silicon solar cell pieces. The resourceful treatment method has the advantages of simple process, short time consumption, low resourceful treatment cost and high recovery rate of elements such as silicon.

The invention provides a soldering flux and a preparation method and application thereof, and relates to the technical field of solar cells. Specifically, the scaling powder is used for the series welding process of photovoltaic modules of amorphous silicon solar cells. The soldering flux comprises the following components in parts by weight: 80 to 100 parts of an alcohol solvent, 0.5 to 3 parts of a film-forming agent, 0.2 to 1 part of an active agent, 0.1 to 0.5 part of a surface active agent and 0.1 to 0.5 part of a corrosion inhibitor. According to the scaling powder, by optimizing the selection and proportion of all the components, the problem that white crystals are generated in the using process of a series welding machine through a traditional scaling powder is thoroughly solved, the equipment utilization rate and production efficiency are remarkably improved, the equipment shutdown maintenance time is shortened, and meanwhile the stability and reliability of the welding quality are guaranteed.

This invention belongs to the field of coating technology, and specifically relates to an optical enhancement coating and its preparation method. The optical enhancement coating, by weight, comprises: 2-5 parts modified nanofiller, 0.3-0.8 parts tetra(substituted pyridine) tetracopper tetraiodide, 5-10 parts hydroxyl-terminated polydimethylsiloxane, 5-10 parts methacryloxypropyl-terminated polydimethylsiloxane, 0.5-1.5 parts photoinitiator, 0.005-0.01 parts curing catalyst, 0.2-0.4 parts dispersant, and 50-70 parts organic solvent. This coating has high light transmittance and, when applied to crystalline silicon solar cells, can improve short-circuit current density and power conversion efficiency, while also exhibiting good storage stability and process compatibility.

The embodiment of the utility model discloses horizontal electroplating equipment for a photovoltaic crystalline silicon solar cell, which is used for electroplating an electroplated part and comprises an upper electroplating tank, the upper electroplating tank consists of a plurality of tank body units, each tank body unit comprises an electroplating tank, a plurality of cathode units and a plurality of anode units, electroplating liquid is arranged in the electroplating tank, and the cathode units are arranged in the electroplating tank. The plated part is in contact with the cathode units and the electroplating liquid, the cathode units are connected in parallel, and the anode units are connected in parallel. Compared with a soaking type tank body structure of traditional electroplating equipment, the floating type tank body structure is adopted and combined with a cathode and anode parallel connection mode, the problem that the quality of a plating layer is affected due to uneven current distribution in the tank body can be solved, and therefore the quality and performance of the plating layer are improved.

In order to produce a crystalline silicon solar cell, a conductive paste is provided, which is suitable for the formation of an electrode by a laser treatment process, and which contains a lead-free glass frit. This conductive paste is used for forming an electrode of a solar cell, and contains (A) conductive particles, (B) an organic vehicle, and (C) a glass frit that does not substantially contain PbO, the product BGF * G of the alkalinity BGF of the glass frit (C) and the content G of the glass frit (C) in parts by weight in the conductive paste when the content of the conductive particles (A) in the conductive paste is taken as 100 parts by weight is in the range of 0.25-1.45.

The invention discloses a method for removing a silicon nitride antireflection layer on a crystalline silicon solar electric surface. A waste crystalline silicon solar cell containing a silicon nitride layer is obtained through pretreatment, the waste crystalline silicon solar cell is put into a high-pressure reaction kettle, water is added as a solution, the high-pressure reaction kettle is transferred to a high-temperature environment to start a reaction after a kettle cover is tightened, and finally a silicon nitride antireflection layer on the surface of the waste crystalline silicon solar cell is removed. According to the method, the silicon nitride antireflection layer on the surface of the crystalline silicon solar cell is effectively etched and removed in a hydrothermal environment by using pure water as a solvent and using a high-pressure reaction kettle, and the removal rate of the silicon nitride antireflection layer can reach 100%. The process is simple and efficient, does not use any chemical reagent, and is environment-friendly. The method is easy to operate, wide in applicability, environmentally friendly and free of secondary pollution. Other chemical reagents are not introduced, the reaction system is simple and environment-friendly, and effective removal of the silicon nitride antireflection layer is realized. The applicability is wide, and efficient removal of the antireflection layer can be achieved for crystalline silicon solar cells of different types and different components.

The invention relates to the field of silicon solar cells, and particularly discloses a back contact cell module and a photovoltaic system. The back contact battery assembly comprises a first battery string and a second battery string, and each of the first battery string and the second battery string comprises a plurality of battery pieces arranged along a first direction; the adjacent battery pieces are electrically connected through a first welding strip, and the first welding strip extends along the first direction; the first battery string and the second battery string are arranged along a first direction; the first bus bar is arranged on the backlight surface of the battery piece and extends along a second direction, and the first direction is crossed with the second direction; the first bus bar is electrically connected with the first battery string and the second battery string through a second welding strip; wherein L2 / L1 is greater than 1 and less than 1.25; in the formula, L1 is the length of the first welding strip, and L2 is the length of the second welding strip. According to the invention, the reliability and the output power of the back contact battery assembly can be improved at the same time.

The application discloses a silicon / perovskite three-terminal stacked solar cell structure and a preparation method thereof. The silicon / perovskite three-terminal stacked solar cell comprises a perovskite top solar cell unit and a back contact silicon solar cell unit. The structure of the perovskite top solar cell unit is sequentially arranged from top to bottom as a first metal electrode layer, a first reflection reduction layer, a first transparent conductive oxide layer, a first transparent oxide buffer layer, a first transport layer, a first passivation layer, a perovskite absorber layer and a second transport layer. The silicon bottom cell and the perovskite top cell of the silicon / perovskite three-terminal stacked solar cell are in a three-terminal stacked cell structure, and do not need to meet the current matching requirement of a two-terminal stacked cell, so that a higher photoelectric conversion efficiency than that of a sub-cell can be obtained, and the preparation process is simple and the preparation cost is low.

The invention relates to the technical field of high-efficiency crystalline silicon solar cell manufacturing, in particular to a stress coordinated regulation and low-damage manufacturing method and system for an ultrathin TOPCon cell, and the method comprises the steps: providing a crystalline silicon wafer; preparing a passivation contact precursor structure on the back surface; a composite transmission system is adopted, a silicon wafer is fixed to a high-temperature transmission station through electrostatic adsorption, and a non-high-temperature station is supported and fixed through a micro-dot matrix; annealing the doped amorphous silicon layer, and crystallizing the doped amorphous silicon layer into a polycrystalline silicon layer; respectively depositing stress-coordinated silicon nitride covering layers on the front surface and the back surface to balance the intrinsic stress of the polycrystalline silicon layer; finally, optimized sintering treatment is carried out, the peak temperature is lower than that of a conventional PERC battery, a slow cooling area is arranged, and through optimized transmission, thin film deposition, annealing and sintering processes, the manufacturing efficiency and the yield of the ultrathin TOPCon battery are improved, physical damage in the transmission process is reduced, the fragment rate is reduced, the thin film stress is effectively balanced, and the stability of the battery is ensured.

This invention discloses an environmentally friendly cascaded recycling method for silicon and silver in retired photovoltaic modules, belonging to the field of new energy solid waste resource utilization technology. The method includes the following steps: (1) removing the aluminum frame and junction box from the retired photovoltaic module and collecting metallic aluminum, copper-containing materials and laminates respectively; (2) processing the laminates to fully decompose the EVA film and separate photovoltaic glass, backsheet and silicon solar cells; (3) crushing and grinding the silicon solar cells to obtain grinding products; (4) gravity separation of the grinding products to obtain silver concentrate and silicon coarse material; (5) flotation separation of the silicon coarse material to obtain aluminum concentrate and silicon tailings. This invention adopts the method of "gravity-flotation combined separation-silver-silicon cascaded recycling". First, silver is initially enriched through gravity separation to obtain silver concentrate; then, the "float aluminum and suppress silicon" strategy is adopted and supplemented by the compound synergistic effect of dual flotation agents to achieve effective flotation separation of silicon and aluminum.

The invention discloses a crystalline silicon solar cell and a preparation method thereof. The crystalline silicon solar cell may include: a crystalline silicon substrate; the first intrinsic silicon-containing film layer is arranged on the main surface of the crystalline silicon substrate; the first doped silicon-containing film layer is arranged on the outer side of the first intrinsic silicon-containing film layer and comprises first doped atoms, the conduction type of the first doped atoms is opposite to that of second doped atoms contained in the crystalline silicon substrate, and the first doped silicon-containing film layer does not completely cover the first intrinsic silicon-containing film layer; the first transparent conductive film layer is arranged on the outer side of the first intrinsic silicon-containing film layer which is not covered by the first doped silicon-containing film layer and is in direct contact with the first intrinsic silicon-containing film layer; the second transparent conductive film layer is arranged on the outer side of the first doped silicon-containing film layer and is in direct contact with the first doped silicon-containing film layer; the first doped silicon-containing film layer and the second transparent conductive film layer are electrically isolated from the first transparent conductive film layer. The battery is simple in structure, the process complexity can be reduced, and structural damage caused by the preparation process is reduced.

The present application relates to a silicon solar cell. In one example, a silicon solar cell includes a silicon substrate including an antimony element; and a carrier separation layer, formed on the silicon substrate. At least some regions of the carrier separation layer on a side close to the silicon substrate have an antimony-containing layer. The antimony-containing layer includes the antimony element. A peak concentration of the antimony element in the antimony-containing layer is a1, and a1 is equal to or greater than 1E13 atoms / cm3.

The application discloses a crystalline silicon perovskite laminated solar cell and a preparation method. The cell comprises, from bottom to top, a crystalline silicon solar cell, an intermediate transparent conductive layer, a metal oxide layer and a perovskite solar cell which are sequentially laminated, wherein the intermediate transparent conductive layer covers part of the area of the crystalline silicon solar cell; each edge of the intermediate transparent conductive layer is recessed from the edge of the adjacent crystalline silicon solar cell by a certain distance; and the metal oxide layer covers the intermediate transparent conductive layer and the area of the crystalline silicon solar cell which is not covered by the intermediate transparent conductive layer. The cell can reduce the risk of electric leakage and short circuit of the crystalline silicon perovskite laminated solar cell.

The application provides a kind of main grid silver paste for silicon solar cell and a preparation method thereof.The main grid silver paste for silicon solar cell has good secondary grid matching ability and high main grid line peeling strength, and comprises silver powder, glass powder and organic carrier, wherein the weight percentage of each component is as follows, based on the total weight of the main grid silver paste for silicon solar cell being 100%: silver powder 80.0%-90.0%; glass powder 0.3%-2.0%; and organic carrier 8.0%-15.0%.The main grid silver paste for silicon solar cell provided by the application can better match the step-by-step printing of different types of cell pieces, and can also match different types of secondary grid silver paste, with high open voltage after matching, high photoelectric conversion efficiency, and high main grid peeling strength, which can better meet the requirements of the current different types of paste and cell piece step-by-step printing main grid paste.

This application discloses a glass powder, a conductive paste, a conductive electrode, and a crystalline silicon solar cell, relating to the field of semiconductor technology. The glass powder, by weight, comprises the following components: 56.5 mol%–72.5 mol% of a first glass forming body; 12 mol%–22 mol% of a glass intermediate; 7.5 mol%–14.5 mol% of a corrosive oxide; and 2.5 mol%–10 mol% of a modifier. In this application, the amount of corrosive oxide is limited to provide the etching activity required for effective contact formation while suppressing excessive chemical etching. The glass intermediate provides cations with high field strength, which form strong ionic covalent interactions with oxygen, thereby enhancing the bonding strength of the glass network. The modifier provides high-valence cations to adjust the charge compensation and coordination environment in the network to obtain good structural stability.

The invention belongs to the technical field of waste photovoltaic module resource recovery, and particularly relates to a method for selectively recovering a silver grid line of a solar cell based on an organic strong alkali solution. The method comprises the following steps: S1, pre-treating a decommissioned photovoltaic cell to obtain a clean waste crystalline silicon solar cell from which glass, a packaging material and a back plate are removed; s2, immersing the waste crystalline silicon solar cells obtained in the step S1 in an aqueous solution of organic amine alkali, and placing the immersed waste crystalline silicon solar cells on a constant-temperature heating device for heating and stirring treatment; and S3, taking out the battery piece processed in the step S2, performing ultrasonic separation on the silicon wafer and the silver grid line, and recovering to obtain complete silver. According to the method, the efficient and selective stripping of the silver grid line is realized by utilizing DBU or DBN under a mild water bath heating condition, and the integrity of a silicon wafer is protected to the maximum extent, so that the clean and high-valued separation of silver and silicon is realized.

A photovoltaic film system for use with a near end-of-life or end-of-life silicon solar panel, the photovoltaic film system comprising a translucent photovoltaic film stack which includes, in order, an outer protective layer, an outer translucent electrode layer, one of an electron transport layer or a hole transport layer, a semi-conductor perovskite layer, the other of the hole transport layer or the electron transport layer and an inner translucent electrode layer; an inverter; and electrical connectors connecting the inverter to each of the outer translucent electrode layer and the inner translucent electrode layer. The photovoltaic film system can be used to restore near end-of-life or end-of-life silicon solar panels in situ.

The invention belongs to the technical field of efficient crystalline silicon solar cells, and particularly relates to a preparation method of a doping-free electron selective contact crystalline silicon solar cell compatible with copper electroplating metallization. According to the method, a titanium-containing nitride (TiN or TiOxNy) thin film is adopted as a front electron selective contact layer, and preparation is carried out through physical / chemical vapor deposition technologies such as electron beam evaporation, magnetron sputtering or atomic layer deposition. According to the structure, the excellent work function matching characteristic and conductivity of the titanium-containing nitride are utilized, efficient electron extraction and transmission are achieved, a copper electroplating process is directly compatible to prepare the metal grid lines, and the material cost of traditional silver paste is effectively reduced. In addition, a transparent conductive oxide (TCO) thin film is omitted from a light receiving surface, and the optical performance is optimized by combining antireflection layers such as MgF2 and SiNx. The preparation method is simple in preparation process and low in cost, and has a wide application prospect in the fields of single crystal silicon cells and perovskite / crystalline silicon laminated solar cells.

The application discloses an etching liquid activator and a preparation method and application thereof, and is used for manufacturing of crystalline silicon solar cells. The etching liquid activator comprises silicon powder and a mixed solution. The mixed solution comprises a surfactant, a catalyst, a dispersing agent and water. In use, the activator is added into the etching liquid for the crystalline silicon solar cells, so that the etching liquid can be rapidly activated, the activation time is reduced, the activation time is shortened to 15-20 minutes, the equipment productivity is improved, the amount of the silicon powder is far less than that of damaged or poor-quality silicon wafers, the cost of the silicon powder is far lower than that of the damaged or poor-quality silicon wafers, and the activation cost is reduced.

The invention relates to a method for selectively recovering Ag from retired photovoltaic silicon cells and preparing Al2O3 and SiO2, and belongs to the technical field of secondary resource recovery. The method comprises the following steps of: mechanically crushing and grinding a retired photovoltaic silicon battery piece to obtain battery powder, and oxidizing and roasting the battery powder in an air atmosphere to oxidize Al and Si in the battery powder and not oxidize Ag; uniformly mixing the oxidized battery powder with a trapping agent Y (Zn, Mg or Zn-Mg alloy), heating and melting in an argon atmosphere, selectively trapping Ag under a stirring condition to obtain a Y-Ag melt, and performing solid-liquid separation to obtain the Y-Ag melt and mixed powder of Al2O3 and SiO2; and the Y-Ag melt is subjected to vacuum gasification separation, residual Ag and a condensed trapping agent Y are obtained, and the trapping agent Y can be returned to be continuously used for Ag trapping. According to the method, selective trapping of metal Ag in the retired photovoltaic silicon battery piece can be achieved, pollution of Al and Si is prevented, zinc and magnesium serving as trapping agents can be recycled, and the method has the advantages of being clean, efficient, short in process and the like.