88 results about "Silicon matrix" patented technology

The invention belongs to the technical field of adhesive preparation, and particularly relates to a flexible epoxy adhesive modified organic silicon adhesive and a preparation method and application thereof.The flexible epoxy adhesive modified organic silicon adhesive is composed of a component A and a component B, the component A is prepared from 40-70 parts of vinyl-terminated silicone oil, 10-30 parts of hydrogen-containing silicone oil, 5-20 parts of filler, 1-5 parts of coupling agent and 1-10 parts of curing agent; and the component B comprises the following components in parts by weight: 60-70 parts of vinyl-terminated silicone oil, 5-20 parts of epoxy resin, 5-15 parts of a platinum catalyst, 1-5 parts of an accelerant, 1-5 parts of an inhibitor and 5-20 parts of filler. Epoxy resin is introduced into an organic silicon matrix and is matched with a toughening agent and a catalyst, so that efficient combination of a two-phase system is realized, and the adhesive which is stable in performance, high in adhesive force and excellent in flexibility is obtained and has excellent comprehensive performance and application prospects in electronic packaging, automobile part bonding and building sealing.

The invention discloses a solar cell, a photovoltaic module and a preparation method thereof. The solar cell may include: a silicon substrate having a textured first main surface; an emitter, a passivation layer and a front antireflection layer are laminated on the first main surface from inside to outside; a first silver-aluminum gate line arranged on the front antireflection layer, wherein the first silver-aluminum gate line is in ohmic contact with the emitter; in the textured structure, a metalized area and a non-metalized area corresponding to the first silver-aluminum gate line meet at least one of the following conditions: a first projection coefficient of the metalized area is greater than a second projection coefficient of the non-metalized area except the metalized area; the roughness of the metalized region is greater than that of the non-metalized region; the top of the suede area corresponding to the metalized area is of a plane structure or a cambered surface structure, and the top of the suede area corresponding to the non-metalized area is of a pointed structure; the metalized region is of a planar structure, and the non-metalized region is of a pyramid structure. The structure can improve the reliability of the solar cell.

The invention discloses a thermal interface material based on elastomer glass and a preparation method thereof. The thermal interface material is prepared from the following raw materials: a diglycidyl ether-terminated liquid polythioether prepolymer, methyl tetrahydrophthalic anhydride, ethylene glycol diglycidyl ether, a catalyst and a heat-conducting filler. According to the invention, the highly vertical orientation of the heat-conducting filler is realized through a process of combining hot pressing and stack welding, and the heat-conducting filler has an extremely high heat conductivity coefficient in the vertical direction. The Rc of the thermal interface material is much lower than that of a commercial thermal interface material adopting a traditional silicon matrix, and the thermal interface material has a spontaneous contact behavior on the surface of the substrate.

The invention discloses an organic silicon heat-conducting gasket and a preparation method thereof, and the preparation method comprises the following steps: mixing and uniformly stirring an organic silicon matrix, a heat-conducting filler, a nano material and a fibrous reinforcing filler to obtain mixed slurry; wherein the organic silicon matrix accounts for 10 to 50 parts; 20 to 80 parts of a heat-conducting filler; 1 part to 10 parts of a nano material; 1 part to 10 parts of fibrous reinforcing filler; the heat-conducting filler comprises surface-modified flaky boron nitride; the mixed slurry is subjected to multiple times of blade coating, forming and curing on a substrate, and an organic silicon heat conduction blank with sheet-shaped boron nitride oriented in the thickness direction is obtained; and cutting the organic silicon heat-conducting green body along the direction perpendicular to the blade coating plane to obtain the organic silicon heat-conducting gasket which is provided with a heat-conducting network in vertical orientation. According to the organic silicon heat-conducting gasket disclosed by the invention, extremely high heat conductivity coefficient can be obtained in the vertical direction by using relatively low heat-conducting filler content; meanwhile, the compression resilience of the gasket is obviously improved.

The invention relates to a desolventizing layer modified silicon-carbon negative electrode and a preparation method, the desolventizing layer modified silicon-carbon negative electrode comprises a silicon-carbon negative electrode, the silicon-carbon negative electrode comprises porous carbon mainly comprising mesopores and a silicon substrate attached in the pores of the porous carbon, and the desolventizing layer is covered on the surface of the silicon-carbon negative electrode. The desolventizing layer is an oxide of an amorphous active metal and a composite oxide of the amorphous active metal and lithium, the desolventizing layer at least covers the surface of the silicon substrate in the pores of the porous carbon, the desolventizing layer is made of amorphous titanium oxide, lithium titanate, niobium oxide, lithium niobate and titanium niobate, and after the electrolyte permeates into the pores of the porous carbon, the surface of the silicon substrate is coated with the desolventizing layer. And the lithium ions subjected to desolvation through the desolvation layer are alloyed with a silicon substrate. And the structural stability, the charge-discharge efficiency and the rate capability of the silicon-carbon negative electrode material are improved.

The present invention relates to the field of photovoltaic technology, and discloses a TBC battery structure with a self-formed gap region and a PVD method for preparing the same, comprising a silicon substrate, wherein the back surface of the silicon substrate is provided with a p+ region and an n+ region, wherein the height positions of the p+ region and the n+ region on the back surface of the silicon substrate are staggered to form a step, and a gap region is formed at the step sidewall connecting the p+ region and the n+ region, wherein the gap region is used to electrically isolate the p+ region and the n+ region; the p+ region comprises a first tunneling oxide layer, a p‑poly layer, a second tunneling oxide layer and an n‑poly layer sequentially deposited on the silicon substrate; and the n+ region comprises a second tunneling oxide layer and an n‑poly layer sequentially deposited on the silicon substrate. The present invention utilizes p‑poly to superimpose n‑poly to form a tunneling junction, which can directly avoid using a second laser to remove the n‑poly on the p‑poly, avoids damage to the surface crystalline silicon layer by the laser, and simultaneously reduces a laser grooving process, thereby greatly reducing the production cost.

The utility model provides a TOPCon cell sheet capable of reducing back parasitic absorption and a photovoltaic assembly, and relates to the technical field of solar cells. The TOPCon battery piece capable of reducing parasitic absorption on the back surface comprises an N-type crystalline silicon substrate, wherein a first tunneling oxide layer, an intrinsic polycrystalline silicon layer, a second tunneling oxide layer, a phosphorus-doped polycrystalline silicon layer, a third tunneling oxide layer and a transparent conductive film sequentially cover the back surface of the N-type crystalline silicon substrate. The TOPCon battery piece comprises the N-type crystalline silicon substrate, so that on the basis of reducing the thickness of the Poly-Si composite layer on the back surface, parasitic absorption is reduced, the light utilization rate is increased, and composite current and contact resistance are reduced, so that the efficiency of the battery piece is effectively improved.

The invention discloses an ultraviolet curing organic silicon conductive adhesive and a preparation method thereof, and relates to the technical field of conductive materials, the ultraviolet curing organic silicon conductive adhesive comprises the specific components of organic silicon matrix resin, a photosensitive curing agent, a conductive filler, a reactive diluent, a coupling agent and a thixotropic agent; the photosensitizer further comprises carborane cluster particles, a phosphazene silane nanocage, a sulfur-doped tungstate nanosheet, a potassium fluoride modified hollow graphene ball and an additive of a germanoxane photosensitizer. The material is prepared based on the materials. According to the preparation method, multiple functional additives are introduced into a traditional ultraviolet curing organic silicon conductive adhesive system, a multi-dimensional conductive path is constructed on the molecular and nanoscale, and the photocuring initiation efficiency and the interface stability are optimized, so that the prepared conductive adhesive not only realizes low resistivity, but also can be rapidly and deeply cured in an adhesive layer with relatively high thickness; and meanwhile, excellent damp-heat resistance and corrosion resistance are achieved.

The invention discloses a preparation method of anti-aging organic silicon gel prepared from high-thermal-conductivity filler, which comprises the following steps: carrying out surface activation on boron nitride and silicon nitride by adopting surface plasma treatment; by adopting a nano coating technology, a thin organic coating layer is formed on the surface of the filler, and the uniform dispersity of the filler in a silicon matrix is optimized; the preparation method comprises the following steps: pre-mixing part of filler with vinyl silicone oil, primarily dispersing by using a high-speed shear mixer, and then adding hydrogen-containing silicone oil for secondary mixing; carrying out mixing and dispersing treatment under a vacuum condition, thoroughly dispersing the filler in a vacuum environment by utilizing ultrasonic waves, and carrying out degassing treatment at the same time; adding an anti-aging agent, an ultraviolet light absorber and a wetting agent, then adding a platinum catalyst and a curing accelerator, and adjusting the crosslinking speed; and injecting the mixed organic silicon gel material into a mold, and carrying out pre-curing treatment. By adopting the high-thermal-conductivity filler and optimizing the surface treatment and dispersion process of the filler, the heat dissipation capability and the aging resistance are remarkably improved.

The invention relates to a solar cell and a preparation method thereof, and a photovoltaic module, the solar cell comprises a silicon substrate, the silicon substrate comprises a front surface and a back surface, the front surface and / or the back surface respectively comprise a stress dispersion area, and the stress dispersion areas are at least distributed on two sides of any one of the front surface and / or the back surface. The solar cell has excellent flexibility and high photoelectric conversion efficiency, and large-scale commercial production and application of the flexible solar cell are facilitated.

The invention provides a negative electrode material and a secondary battery. The negative electrode material comprises an inner core and a shell, the inner core comprises a silicon substrate and a filling agent, at least part of the filling agent is distributed in the silicon substrate, the filling agent comprises transition metal carbide and a carbon substrate, the shell is arranged on at least part of the surface of the inner core, and based on the negative electrode material, the mass ratio of transition metal elements is 0.5%-5%. The negative electrode material has relatively high particle strength, the cyclic expansion effect of the obtained negative electrode plate can be reduced, and the cyclic stability of the obtained secondary battery is improved.

The invention discloses high-wettability reactive nano-silver ink for flexible electronics and a preparation method and application thereof.The preparation method comprises the following steps that S1, silver citrate is weighed and placed in a container, ammonia water is added, and a mixture A is obtained; s2, adding a citric acid solution and organic alcohol into the mixture A to obtain a mixture B; s3, adding ascorbic acid into the mixture B, performing ultrasonic treatment, and filtering to obtain filtrate which is a mixture C; and S4, a surfactant is added into the mixture C, the surfactant is one or more than two of a polyoxyethylene acid ester surfactant, a polyether modified siloxane surfactant and a phenyl ether surfactant, and the ink is obtained after ultrasonic filtration. The prepared ink has excellent stability, can realize low-level rapid sintering, and shows excellent wettability on a silicon substrate.

The application discloses a kind of organic silicon composite functional materials and its wireless monitoring system and method for intelligent application, the interface film includes by outer to inner sequentially stacked anti-fouling and wetting-resistant surface layer, hydrogen bond enhanced dynamic adaptive layer and inorganic filler modulus enhanced protective layer.Anti-fouling and wetting-resistant surface layer is composed of organic silicon elastomer composite material, hydrogen bond enhanced dynamic adaptive layer is introduced by blending in organic silicon matrix into the modified component containing urea group and the like can form hydrogen bond functional group, and inorganic filler modulus enhanced protective layer is introduced by inorganic filler such as barium titanate to improve modulus and compression resistance.The interface film is integrated with pressure sensor module, wireless communication module and host computer system, to form a complete wireless pressure monitoring system, realize real-time transmission of pressure signal, visual display, threshold alarm and data management.The application is suitable for wearable health monitoring, medical care, child companion guardianship and robot touch and the like fields.

The present invention discloses a silicon-based anode material, a preparation method thereof and uses thereof. The silicon-based anode material includes: a silicon matrix material; a first coating layer and a second coating layer sequentially formed on the surface of the silicon matrix material; wherein, the first coating layer is composed of MOFs, the central metal atom in the MOFs is a transition metal, and the organic ligand is an organic carboxylic acid; the second coating layer is composed of HNTs. By forming an HNTs@MOFs composite coating layer on the surface of the silicon matrix material, the present invention enables the silicon-based anode material to have a stable structure, small volume expansion during charge and discharge, good electrical conductivity, and excellent cycle stability and rate performance.

The embodiment of the invention provides an N-type TOPCon battery and a preparation method thereof, and the preparation method of the N-type TOPCon battery provided by the embodiment of the invention comprises the following steps: after texturing treatment, firstly forming a first mask oxide layer in a non-grid line region on the front surface of a silicon wafer, and then carrying out boron diffusion treatment, as the first mask oxide layer exists in the first region serving as the non-grid line region, boron atoms can be prevented from entering, and the requirement for low doping concentration can be met; boron atoms can be doped at a high concentration due to exposure and no oxidation layer obstruction of the second region serving as the grid line region, and the sheet resistance can be as low as 60 ohms, so that the purpose of boron atom high-low concentration doping in the grid line region and the non-grid line region is achieved, damage of laser doping to the silicon substrate is avoided, and the service life of the silicon substrate is prolonged. And the open voltage and the photoelectric conversion efficiency of the cell can be effectively improved.

The invention provides a production method of a low contact resistance TOPcon battery, and relates to the technical field of TOPcon batteries. The invention discloses a production method of a low-contact-resistance TOPcon battery. The production method comprises the following steps: inspecting and cleaning a silicon wafer; laser selective texturing is carried out, and a pyramid surface is formed in a light absorption area; carrying out poly deposition on the front surface by adopting PECVD (Plasma Enhanced Chemical Vapor Deposition), and introducing borane to form primary B doping; and high-temperature annealing. In the current texturing process, a texturing groove is removed, a cleaning groove is reserved, after cleaning, front poly layer deposition and B elementary substance deposition are carried out in the first step, annealing operation is carried out after completion, then the texturing groove is added in the back BSG removing process, a pyramid structure is formed on the surface of the silicon wafer, and light absorption is improved. The method avoids the situation that defects in the silicon substrate are excited and amplified in a high-temperature environment, and meanwhile, a low-temperature process can be adopted, so that more energy is saved.

Systems and techniques for facilitating quantum tuning via permanent magnet flux elements are provided. In various embodiments, the system may include a qubit device. In various aspects, the system may further include a permanent magnet having a first magnetic flux, wherein the operating frequency of the qubit device is based on the first magnetic flux. In various cases, the system may further include an electromagnet having a second magnetic flux that tunes the first magnetic flux. In various cases, the permanent magnet may include a nanoparticle magnet. In various embodiments, the nanoparticle magnet may include manganese nanoparticles embedded in a silicon matrix. In various aspects, the system may also include electrodes that apply a current to the nanoparticle magnet in the presence of the second magnetic flux, thereby changing the strength of the first magnetic flux.

The present invention relates to the field of solar cells and discloses a method for preparing a TBC solar cell with a polished isolation region structure. First, the present invention improves the conventional isolation region structure with a pyramid velvet surface into a polished isolation region structure protruding from the back of the silicon wafer, which can increase the reflection of incident light in the silicon matrix, thereby improving the efficiency of the cell. I sc At the same time, since the initial isolation area is protected by the mask layer and is not damaged by subsequent wet etching, the height difference between the isolation area and the boron / phosphorus diffusion layer can be reduced, which is beneficial to the lateral transmission of carriers inside the silicon substrate and improves FF, Secondly, the present invention optimizes the process steps to achieve a TBC solar cell by depositing an intrinsic polycrystalline silicon layer in a single step, which can effectively improve the performance and yield of the product and significantly reduce the production cost at the same time.

The invention relates to a method for detecting carbon coating integrity of silicon negative electrode powder. The silicon negative electrode powder comprises a silicon substrate and a carbon coating layer. The detection method comprises the following steps: contacting an alkaline solution with each group of silicon negative electrode powder in a sealed container; monitoring the pressure change in the container, and recording the gas pressure change rate from the reaction start to the first time range; calculating the gas production rate of the silicon negative electrode powder per unit mass according to the gas pressure change rate; and according to the gas production rate, the difference of the carbon coating completeness of the multiple groups of silicon negative electrode powder is judged. The reaction rates of the silicon negative electrode powder with different coating completeness and the alkaline solution are different, and the gas generation rates are also different, so that the real-time air pressure changes in the sealed container are also different. By monitoring the pressure change in the container in real time, real-time data recording and curve drawing can be realized, the material reaction condition can be calculated, the gas production rate and the gas production rate can be dynamically evaluated, and the coating characteristic difference identification of the silicon negative electrode powder can be realized in a quantitative manner.

The invention discloses a non-combustible reed fiber-silicon composite material based on charge reconstruction driving molecular bridging and a preparation method of the non-combustible reed fiber-silicon composite material, and relates to the technical field of building materials and functional composite materials. The composite material is composed of Portland cement, cationic carbon dot modified reed fibers, regular octahedral Cu-MOF nanoparticles, water and a silane coupling agent, and fiber-cement interface charge reconstruction and molecular bridging are achieved through cationic carbon dots, and the confinement catalytic char forming effect of regular octahedral Cu-MOF is cooperated; the interfacial compatibility and stress transfer efficiency between the reed fiber and the silicon matrix are remarkably improved, so that the composite material has high compressive strength and bending strength, high thermal stability, excellent flame retardance and smoke suppression, can meet the application requirements of non-combustible building boards, and is simple in process, environment-friendly and suitable for industrial production. The method is suitable for popularization and application in practical engineering.

The invention discloses a lead-oxygen-silicon composite solid electrolyte material and a preparation method of a lead-oxygen-silicon battery, and relates to the technical field of solid-state batteries, the material comprises the following components by weight: 15-30 parts of a lead-oxygen compound; 40 to 60 parts of a mesoporous silicon substrate; 1-5 parts of a rare earth element dopant; 0.5-3 parts of an alkaline earth metal dopant; the lead-oxygen compound is compounded to serve as an ion conduction core, the rare earth element and the alkaline earth metal doping agent are matched to form a synergistic system, the ion conduction environment can be optimized, the ion migration efficiency can be improved, free lead ions can be anchored through the chemical effect, lead ion dissolution is greatly reduced, and the lead-ion conductivity is improved. The environmental protection property and the ion conduction capability are considered; and meanwhile, a hierarchical porous structure is constructed by virtue of a mesoporous silicon substrate, so that the lead oxide compound is loaded in order in a nano form, a pore channel is accurately filled with a polymer phase, a continuous and stable ion conduction path is formed, and the problems of high interface impedance and discontinuous conduction path of the traditional electrolyte are effectively solved. [1] The synergistic compounding of the rare earth element and the alkaline earth metal dopant in the patent is the core innovation point, the multi-stage material is only used as the auxiliary innovation, and when an embodiment is written, only the contrast of the core innovation point needs to be written, and the contrast does not need to be written by using the multi-stage material.

The invention discloses a nucleic acid extraction and purification reagent, a kit and a use method. Reagents of the kit comprise a cell lysis solution, a digestive enzyme, a binding solution, a rinsing solution and an eluent, wherein the binding solution contains an alcoholic solution and sodium salt. Compared with similar kits on the market, the kit provided by the invention has the advantages that a sodium salt reagent is also added in the binding solution besides an alcoholic solution, meanwhile, the mass ratio of sodium salt is optimized, the DNA extract can be efficiently and selectively adsorbed on a centrifugal column silicon matrix membrane by adding the reagent, the yield and purity of obtained nucleic acid are remarkably improved, and the kit is suitable for large-scale popularization and application. Meanwhile, the component NaCl of the lysate is optimized and reduced, and the steps in the preparation and production process are reduced. The reagent / kit is simple in composition and low in cost, the operation method is simple and convenient, large-scale nucleic acid extraction operation is facilitated, in addition, the kit does not contain toxic and harmful reagents such as methylbenzene, dimethylbenzene, phenol and chloroform, harm to the environment and operators is small, and the modern environmental protection concept is better met.

Method for producing a shaped body from a silicon matrix composite material, wherein the shaped body is built up step by step from several layers and subsequently infiltrated with silicon, the molded body is built up using powder bed printing, also known as binder jetting, with a layer thickness of 50 to 250 µm, where SiC is used as the ceramic powder and a binder or binder-hardener system in liquid state, characterized in that the ceramic powder has a multimodal particle size distribution, the main fraction of which has a mean particle size measured by laser diffraction in the range of 40-55 µm and the percent difference (D90-D10) / D50 of the total particle size distribution is between 0.5 and 1.0 and wherein the ceramic powder comprises at least one further fraction whose mean particle sizes are 3-5 µm and / or 10-15 µm.

The application discloses a kind of based on elastomer class glass thermal interface material and preparation method thereof.The thermal interface material is prepared from raw materials including diglycidyl ether-terminated liquid polythioether prepolymer, methyl tetrahydrophthalic anhydride, ethylene glycol diglycidyl ether, catalyst and heat-conducting filler.The application realizes the high vertical orientation of heat-conducting filler by the process of hot-pressing and stack welding, and has very high thermal conductivity in the vertical direction.The R c of the thermal interface material is much lower than that of commercial thermal interface material using traditional silicon matrix, and has spontaneous contact behavior on the surface of substrate.

The present invention relates to a silicon negative electrode material and a preparation method thereof. The preparation method of the present invention comprises the following steps: a heat treatment step S1: placing Mg2Si in a heat treatment device and heat treating it in a nitrogen atmosphere to generate a heat-treated product; an acid treatment step S2: placing the heat-treated product in an acid to react to generate an acid-treated product; a coating step S3: placing the acid-treated product in a fluoride solution at room temperature to react to obtain a porous silicon negative electrode material having an SEI film. The silicon negative electrode material obtained by the preparation method of the present invention has a SEI film that is more tightly combined with the silicon substrate and is more evenly coated, so that when the negative electrode material is used in a battery, its structure is more stable during the cycle process, thereby making the cycle stability and rate performance of the battery more stable.

The utility model relates to the technical field of solar energy, disclose a kind of metal electrode for solar cell, solar cell and photovoltaic module.The metal electrode includes: be located in the metal seed layer (it is at least one layer in silver seed layer, nickel seed layer, zirconium seed layer, titanium seed layer, chromium seed layer, nickel silicon alloy seed layer, copper alloy seed layer) of silicon matrix surface grid line area, be located in the base metal grid line (it is copper grid line and / or aluminum grid line) of metal seed layer surface, and be located in the copper phosphate protective layer (it is copper phosphate layer and / or organic copper phosphate compound layer) of base metal grid line surface.The metal electrode is cooperated by metal seed layer, base metal grid line (such as copper grid line) and copper phosphate protective layer, can reduce contact resistance and ensure interface bonding force, can also save cost, can also improve the corrosion resistance of base metal grid line, the stability and reliability of the metal electrode long-term use outdoors are improved, and battery efficiency decay is slowed down.

This application relates to a negative electrode material, a method for manufacturing the same, and a lithium-ion battery. The negative electrode material includes an active material. The active material includes a porous matrix and a silicon matrix, at least a portion of which is distributed within the pores of the porous matrix. The infrared spectrum obtained by measuring the negative electrode material using an infrared spectrometer has a wavenumber of 2090 cm⁻¹. -1 The stretching vibration peak and wavenumber of the SiH2 bond are 2000 cm. -1 There are stretching vibration peaks for SiH bonds. The ratio Z of the vibration peak area of ​​SiH2 bonds to the vibration peak area of ​​SiH bonds in the anode material is 0.01 to 5.0. Within the above limited range, the silicon matrix in the anode material according to the present invention mainly exists in the form of SiH bonds, and it has become clear that the stability of SiH bonds is greater than that of SiH2 bonds, and that a silicon matrix with many SiH bonds contributes to improving the structural stability of the anode material and the mechanical performance of the silicon matrix, reduces the occurrence of side reactions between the anode material and the electrolyte, and further improves the cycle performance and expansion performance of the anode material.

The invention discloses a MoNbZr / Zr nano-layered material and a preparation method thereof. The MoNbZr / Zr nano-layered material is prepared by depositing on a clean silicon substrate by a magnetron sputtering deposition method. Ar+ ions bombard a target material to cause elastic collisions with MoNbZr / Zr atoms, further generating a collision cascade, whereby the sample atoms are excited and reversely deposited onto the substrate. MoNbZr atoms and Zr atoms are deposited in sequence to alternately form multilayer nano-layered materials with different modulation periods, different interface structures, and different phase compositions. High-density plasmas such as secondary electrons generated by sputtering circulate in the form of cycloids under the combined action of mutually perpendicular electromagnetic fields, and do not contact the substrate. Therefore, the ionization efficiency is high and the deposition rate is fast. The invention not only successfully prepares nano-layered materials with different phase compositions, but also the obtained nano-layered materials are uniform and dense, with clear interface structures and excellent comprehensive performance.

The invention provides a photovoltaic cell capable of continuously generating power day and night and a preparation method, and belongs to the technical field of photovoltaic power generation, the photovoltaic cell comprises a silicon substrate, a passivation layer and an antireflection film layer are sequentially arranged on the front surface and / or the back surface of the silicon substrate from inside to outside, and a fluorescent quantum layer is further arranged on the front surface and / or the back surface of the silicon substrate; and the fluorescent quantum layer is hidden on the inner side of the antireflection film layer, is positioned between the antireflection film layer and the passivation layer or between the passivation layer and the silicon substrate, and is in direct contact with the front surface and / or the back surface of the silicon substrate. According to the photovoltaic cell capable of continuously generating power day and night provided by the invention, the fluorescent quantum layer is prepared in the photovoltaic cell, and the fluorescent quantum layer is hidden below the antireflection film layer, so that the fluorescent quantum layer not only can normally transmit solar rays in the daytime, but also can absorb part of redundant light rays for storage; at night or when light is insufficient, the photovoltaic cell can continuously generate power through afterglow of the fluorescence effect, and the stability of day and night power supply is guaranteed.

A method for preparing TOPCon battery substrate and double-sided electroplated TOPcon battery prepared therefrom are provided. The method includes: providing a double-sided grooved silicon matrix of a TOPCon battery; carrying out thermal repair treatment on the silicon matrix; respectively carrying out light injection treatment on the front side and the back side of the silicon matrix after thermal repair treatment, thereby the TOPCon battery substrate is obtained. Thermal repair treatment can greatly increase the overall lattice thermal motion of the silicon substrate, and light is injected into the front side and the back side in the directions of two different light incidence surfaces, so that both the front side and the back side can absorb light, thereby repairing the defects at the interface between the amorphous silicon and the silicon wafer and improving the quality of the PN junctions.