21results about How to "Improve light absorption" patented technology

The invention discloses a solar single-crystal efficient TOPCon + SE battery piece ultrahigh sheet resistance diffusion process which mainly comprises a front boron process, an SE process and a rear oxidation process, and the front boron process comprises high-temperature oxidation before diffusion and a diffusion process composed of three-step diffusion and heating propulsion. According to the invention, a layer of SiO2 can be coated on the surface of the silicon wafer through high-temperature oxidation before diffusion and is used as an anti-reflection film layer; the PN junction is prepared by adopting a step-by-step diffusion method, so that the advantage of good junction uniformity can be realized, boron can be uniformly distributed on the surface of a silicon wafer through a specific boron diffusion method, and meanwhile, boron elements can be better deposited on the surface of the silicon wafer through variable-temperature diffusion and propulsion; by adding the SE process, the square resistance can reach 700-800 ohms, the junction depth in the grid line area is deeper, the increase of ohms becomes better, the cell center recombination is reduced due to the lower surface concentration, and the open-circuit voltage of the cell is improved; and the post-oxidation process has an annealing effect and can repair lattice damage and the like.

The invention discloses a solar cell and a preparation method thereof, and belongs to the photovoltaic field. The solar cell comprises a cell substrate, a transparent conductive film located on at least one surface of the cell substrate, and an electrode located on the side, away from the cell substrate, of the transparent conductive film. The transparent conducting film comprises a first transparent conducting film located in the electrode area and a second transparent conducting film located in the non-electrode area, and the carrier concentration of the first transparent conducting film is larger than that of the second transparent conducting film. According to the invention, the transparent conductive film is optimized, the contact resistance between the electrode and the first transparent conductive film is reduced, and the carrier concentration difference in the transparent conductive film is combined, so that the collection of carriers is facilitated, and the cell efficiency is improved. Meanwhile, the carrier concentration of the non-electrode area is low, high light transmission can be kept, the light absorptivity of the cell is improved, and therefore the cell efficiency can be improved. According to the invention, the requirements of the electrode area on conductivity and the non-electrode area on light transmission can be balanced, and the efficiency of the cell is improved from the double angles of electricity and optics.

The invention relates to the technical field of auxiliary agents for BC battery manufacturing, in particular to an auxiliary agent for BC battery manufacturing and an application method of the auxiliary agent. The invention relates to an auxiliary agent for manufacturing a BC battery. The auxiliary agent is prepared from the following substances in percentage by mass: 0.3-10% of a high-efficiency dispersant; 0.2%-15% of a surfactant; 0.1%-15% of a stabilizer; 3%-8% of an efficient nucleating agent; 0.1%-5% of a protective agent; and the balance of ultrapure water. According to the auxiliary agent for manufacturing the BC battery, the basic composition of the auxiliary agent for manufacturing the BC battery is optimized, and the protection of the n-poly surface and the p-ply surface of the back surface of the compatible silicon wafer is ensured by adding the protective agent and protecting the n-poly surface and the p-ply surface. After the auxiliary agent for manufacturing the BC battery prepared by the technical scheme of the invention is used, the difference between the textured edge and the middle area of a silicon wafer can be obviously reduced, so that the textured uniformity of the edge wound-plating area and the non-wound-plating area is further improved.

The invention discloses a method for preparing an outdoor copper foam composite high entropy ceramic photothermal fresh water evaporator, comprising the following steps: S1, adding cobalt nitrate hexahydrate, iron nitrate nonahydrate, nickel nitrate hexahydrate, chromium nitrate nonahydrate, manganese nitrate hexahydrate, and hexadecyltrimethylammonium bromide to deionized water, mixing evenly, then adding urea, and stirring to obtain a mixed solution; S2, subjecting the mixed solution to a hydrothermal reaction, centrifuging, washing, and drying to obtain a precursor powder; S3, subjecting the precursor powder to a heat treatment to obtain a high entropy ceramic; S4, adding high entropy ceramics and aluminum phosphate to deionized water, ultrasonically dispersing to obtain a suspension, placing copper foam in the suspension, and drying after immersion to obtain an outdoor copper foam composite high entropy ceramic photothermal fresh water evaporator. The invention has a simple preparation process and is easy to mass produce; the prepared photothermal fresh water evaporator has a high water evaporation efficiency.

The invention discloses a photovoltaic module capable of being unfolded and folded outwards, and belongs to the technical field of photovoltaic equipment. The photovoltaic module comprises a shell, and a fixed mounting structure is arranged at the bottom of the shell; a lifting main board is arranged in the shell, and the lifting main board extends out of or retracts back from the shell under the driving of the lifting driving assembly; a display board is hinged to the lifting main board, the display board rotates around the hinged axis by pushing up the driving assembly, and the display board is provided with a fixed photovoltaic panel. The display board is provided with a first sliding groove, and the interior of the first sliding groove is connected with a sliding photovoltaic panel through a motor base. A storage box is arranged on the display board, a telescopic dustproof sleeve is arranged in the storage box, one end of the telescopic dustproof sleeve is connected with the storage box, and the other end of the telescopic dustproof sleeve is connected with the sliding photovoltaic panel; according to the photovoltaic module, a support does not need to be erected on site to install the photovoltaic panel, the photovoltaic module can be directly installed and used in a modular production site of a factory, and the photovoltaic module has the functions of being capable of extending outwards and being cleaned and has higher practical value.

The invention discloses a preparation method of a D-mannitol-melamine foam composite solid-solid phase change material. The preparation method comprises the following steps: cutting melamine foam MF into small blocks; placing the melamine foam sample cut into blocks on a porcelain boat in a quartz tube of a tubular resistance furnace, carbonizing in a nitrogen atmosphere, and cooling to room temperature after carbonization is finished; adding the carbonized melamine foam CF block into molten D-mannitol DM, and carrying out vacuum impregnation in a vacuum drying oven; and taking out the impregnated sample, heating the sample on a heating plate, and removing redundant mannitol on the surface to obtain the D-mannitol-melamine foam. The prepared DM / CF composite material has excellent shape stability, leakage, loss or form out-of-control of the phase change material in the phase change process can be avoided, the safety and reliability of the material are guaranteed, and potential application prospects are provided for the fields of solar energy utilization, industrial waste heat recovery and the like.

The invention discloses a graphene plasmon polarizer based on patterned nanogold array modification and application, and belongs to the technical field of optical communication. The graphene plasmon polarizer comprises a substrate silicon dioxide, a light absorption layer graphene, a patterned gold nano array and a top electrode source drain electrode. According to the invention, the nested gold nano cylinder and gold nano circular ring form a resonant cavity, the absorption wave band of the plasmon polarizer is regulated and controlled by using a surface plasmon resonance effect, the shape of the resonant cavity is changed by changing the relative position of the gold nano circular ring and the gold nano cylinder, and a nano structure with different resonant cavity sizes in all directions is formed. Therefore, the plasmon polarizer is sensitive to different polarized lights. Meanwhile, the local surface plasmon effect excited by the gold nano array increases the surface electric field of the graphene, the generation rate of electron hole pairs in the graphene is improved, and the detection efficiency of the plasmon polarizer is improved.

The invention discloses a laminated solar cell module, a method for improving the photoelectric conversion efficiency of the laminated solar cell module and application of the laminated solar cell module. The laminated solar cell module comprises a first cell used for absorbing first wave band light in incident light; the third battery is used for absorbing third wave band light formed from the first installation site, and the first battery and the third battery are sequentially arranged in a stacked mode; or the first battery is used for absorbing the first wave band light in the incident light; the fourth battery is used for absorbing fourth wave band light formed from the second installation site, the first battery and the fourth battery are sequentially stacked, and the third wave band light is different from the fourth wave band light. According to the laminated solar cell module provided by the invention, solar spectrum can be absorbed more sufficiently, incident light in the light incoming direction can be fully absorbed, reflected light can also be fully absorbed, and the photoelectric conversion efficiency of the cell module is improved.

The present application relates to an energy supply system, which includes a concentrator, a reaction tube, a storage tank and a pump body. The concentrator and the reaction tube are arranged relatively from top to bottom. The reaction tube includes a first inlet end and a first outlet end. The storage tank includes a second inlet end and a second outlet end. The first inlet end and the second outlet end are connected through a first pipeline, and the first outlet end and the second inlet end are connected through a second pipeline. The third outlet end of the storage tank is used to connect to a hydrogen fuel cell to provide hydrogen for the hydrogen fuel cell. A pump body is provided on the first pipeline, and at least one baffle group is provided in the reaction tube. According to the energy supply system of the present application, the baffle group can disturb the particle suspension entering the reaction tube, thereby improving the dispersion of particles in the suspension per unit volume, effectively alleviating the agglomeration and aggregation of the particle group during the reaction process, and improving the light absorption rate of the suspension, thereby improving the utilization rate of solar energy.

The utility model belongs to solar heating technology field, specifically disclose a box body light -concentrating type solar medium temperature heat collector, the utility model discloses a sealed box body of one side glass cover, the bottom and the side surface of box body are equipped with heat preservation layer, be equipped with upper flow collecting pipe and lower flow collecting pipe in the box body, be equipped with at least two fin heat absorption unit between heat preservation layer and glass cover, the both ends of fin heat absorption unit are connected with the upper flow collecting pipe and lower flow collecting pipe of the intercommunication box body respectively, fin heat absorption unit includes fin adsorption pipe and reflector, and fin adsorption pipe sets up at the light -concentration of reflector surface. The utility model discloses the synergistic effect of metal light -concentrating structure and straight -through type flow channel design, can realize the stable output of medium temperature, improve the pressure intensity of system output, improved the reliability of medium temperature pressure bearing. The utility model can be widely applied to the light -heat conversion field of solar energy.

The present invention discloses a solar cell epitaxial wafer and a preparation method thereof. The epitaxial wafer comprises a substrate, a GaN nucleation layer, a GaN intrinsic layer, an N-type GaN layer, an InGaN / GaN superlattice layer, a U-type GaN layer, an InGaN / GaN quantum well layer, and a P-type GaN layer, which are arranged in sequence from bottom to top. The present invention adopts a substrate, a superlattice layer, and an InGaN / GaN quantum well layer structure with a high In component, reduces the dislocation density, improves the light absorption rate, and obtains an epitaxial wafer with high crystal quality. Compared with a solar cell with a traditional epitaxial wafer, a solar cell made of an epitaxial wafer with a high In component has more carrier collection and less surface recombination, thereby improving the photoelectric conversion efficiency of the InGaN / GaN solar cell to a certain extent.

The invention discloses a liquid phase conversion optical metamaterial perfect absorber and a preparation method thereof, a light absorption layer of the optical metamaterial perfect absorber is prepared by combining a liquid phase conversion solution with a sol-gel method and a nanoimprint method, and the adopted liquid phase conversion solution significantly improves the process compatibility. The coating can be coated on different substrates through a sol-gel method or a coating method at a low temperature, and has good process compatibility and preparation flexibility. And meanwhile, the production cost is effectively reduced by adopting a solution gel method and a micro-nano patterning technology (nanoimprint method), and the method has relatively high industrial adaptability.

The application discloses a phase change microcapsule composite heat storage material with photocatalytic characteristics and a preparation method thereof. The phase change microcapsule composite heat storage material has a whole core-shell structure, paraffin as a core, crystalline TiO2 with photocatalytic characteristics as a shell wall coated on the surface of the paraffin, and nano-titanium nitride and carbon nanotube composite blended photothermal conversion particles as core-shell modification materials uniformly attached to the surface of the TiO2. The phase change microcapsule composite heat storage material has a stable core-shell structure, full-spectrum solar photothermal conversion capacity, and effectively improves the coating rate, the thermal conductivity and the photocatalytic efficiency, retains the thermal properties of paraffin and inhibits leakage and corrosion.

The invention belongs to the technical field of laser functional coatings, and particularly relates to an irradiation energy-absorbing coating for a high-power excimer laser and a preparation method of the irradiation energy-absorbing coating. The method comprises the following steps: S1, preparing a suspension: uniformly mixing 1-8 wt% of laser absorption powder, 0.2-1 wt% of a cross-linking agent and 6.6-7.2 wt% of a solvent, then adding 0.5-1 wt% of a dispersing agent, 0.1-0.3 wt% of carbon nanotubes and 83.1-91 wt% of a solvent, and dispersing for 10-30 minutes by using a cell crusher to form the suspension; and S2, the suspension liquid is sprayed to the surface of a copper matrix through a spraying technology, and the laser irradiation energy absorption coating is formed. The coating provided by the invention has an ultraviolet laser energy absorption function, has high light absorptivity at 308nm under a high-power condition, has excellent heat insulation performance, can prevent a laser energy absorption device from being damaged due to overheating, and is simple in preparation method and easy for large-scale production.

Disclosed in the present invention are an all-black crystalline silicon solar cell and a preparation method therefor, and a photovoltaic module. The preparation method comprises the following steps: (1) depositing a film layer on the front face of a silicon wafer by means of a PECVD method so as to obtain a silicon wafer having a coated front face, wherein the film layer is of a laminated structure and comprises an innermost SiNx layer having a thickness of 20 nm or more; (2) subjecting the resulting silicon wafer having the coated front face to back-face PECVD and laser beam grooving so as to obtain a coarse silicon solar cell; and (3) subjecting the resulting coarse silicon solar cell to silk-screen printing and electron injection to then obtain an all-black crystalline silicon solar cell. In the preparation method provided in the present application, the film layer is deposited on the front face of the silicon wafer by means of the PECVD method, the material and thickness of the innermost SiNx layer are designed, and particularly when the thickness thereof is 20 nm or more, the absorption and reflection effects of incident light on the surface of the cell are influenced, such that the incident light is almost completely absorbed, and only an extremely small amount of the incident light is reflected; therefore, the all-black crystalline silicon solar cell is obtained.

The invention relates to the technical field of solar modules, and discloses a solar module capable of preventing shadow shielding, the solar module comprises two bases and a plurality of photovoltaic modules, the top ends of the bases are provided with moving modules, and the moving modules are used for driving the photovoltaic modules to move back and forth; a mounting assembly is arranged on the front side of the moving assembly and is used for supporting and mounting a photovoltaic assembly; an adjusting assembly is arranged on the rear side of the moving assembly and used for adjusting the angle of the photovoltaic assembly. A fixing frame is arranged outside the moving assembly, and an air blowing assembly is arranged outside the fixing frame and used for conducting air blowing cleaning on the surface of the photovoltaic assembly. By starting the electric guide rail and the moving seat, the whole photovoltaic module can automatically move, so that shadow shielding is avoided, the driving effect of the motor and the gear is started, the rack plate drives the angle change of the oblique beam, it is ensured that the angle of the photovoltaic module is always kept optimal, and therefore the adaptability of the photovoltaic module can be greatly improved.

The utility model relates to a front anti-reflection film structure of a solar cell, the solar cell and a cell assembly, the front anti-reflection film structure comprises a first silicon oxide layer, a silicon nitride layer, a first silicon oxynitride layer, a second silicon oxynitride layer and a second silicon oxide layer which are stacked in sequence, and the second silicon oxide layer is a light incident side. In the front antireflection film structure, through mutual cooperation of the first silicon oxide layer, the silicon nitride layer, the first silicon oxynitride layer, the second silicon oxynitride layer and the second silicon oxide layer with specific thickness and specific refractive index, the potential induced degradation phenomenon of a battery assembly can be improved while the battery conversion efficiency is ensured; and the reliability of the battery assembly is improved.

The application discloses a photovoltaic module and a photovoltaic system. The photovoltaic module comprises a plurality of cell pieces and an interconnecting piece. The plurality of cell pieces are arranged along a first direction, and the interconnecting piece is arranged on the cell pieces and electrically connected to adjacent cell pieces. A plurality of spaced-apart conductive connecting layers are arranged between the interconnecting piece and the cell pieces, and the interconnecting piece is electrically connected to the cell pieces through the conductive connecting layers. At least part of the positions between the interconnecting piece and the cell pieces are provided with gaps between two adjacent conductive connecting layers. In this way, stray light can be irradiated into the gaps and reflected multiple times on the surface of the cell pieces and the surface of the interconnecting piece, so that resonance enhancement is generated to be absorbed by the cell pieces, thereby increasing the light absorption rate of the cell pieces. In addition, the photovoltaic module structure of the application can be realized by optimizing the local structure of the photovoltaic module based on the existing process, without introducing new equipment and new materials, and without increasing the product cost.

A photodetector and its formation method are disclosed. The photodetector includes: a substrate; a light transmission layer located on the substrate, the light transmission layer extending along the light propagation direction and perpendicular to the light propagation direction, the light transmission layer including a light absorption region; a light absorption layer located on the light transmission layer of the light absorption region; a first doped region located in the light transmission layer on the side of the light absorption region; and a second doped layer located on the light absorption layer, and on the side perpendicular to the light propagation direction, at least one side of the second doped layer protrudes outward relative to the light absorption layer, the doping type of the second doped layer being opposite to that of the first doped region. This invention is beneficial for improving the bandwidth and responsivity of the photodetector.

This invention belongs to the field of photo-evaporation desalination of water, specifically relating to a composite photoevaporator for photo-evaporation desalination and its preparation method. Carbon nanotubes, which possess excellent light absorption and water transport capabilities, are dispersed in biomass materials. Simultaneously, a layer of copper acetate is sprayed onto the surface of the biomass materials containing carbon nanotubes, forming copper particles after carbonization. The photoevaporator prepared by this invention combines metal, carbon nanotubes, and biomass materials, exhibiting contrasting hydrophilic and hydrophobic properties and strong salt resistance.

This invention relates to a pyrrolopyrrole organic small molecule photothermal material with high photothermal conversion efficiency, its preparation method, and its application. The invention belongs to the field of organic small molecule photothermal materials. It aims to solve the problems of poor thermal stability and low photothermal conversion efficiency in existing photothermal materials. Preparation method: BrDPPBr, R-boronate, potassium carbonate, and a high-boiling-point solvent are mixed, then heated, and a phosphine compound is added. The mixture is heated and stirred continuously. After the reaction, it is cooled to room temperature, and then pure water is added to precipitate the solid. The solid is then recrystallized and purified to obtain the pyrrolopyrrole organic small molecule photothermal material. Application: It is used for water evaporation. This invention relates to pyrrolopyrrole organic small molecule photothermal materials with high photothermal conversion efficiency, their preparation, and their applications.