80 results about "Tandem cell" patented technology

The embodiment of the invention relates to the technical field of semiconductors, and provides a solar cell, a preparation method, a laminated cell and a photovoltaic module, the solar cell comprises a substrate, the substrate comprises a first surface and a second surface which are oppositely arranged, the first surface comprises a first region and a second region which are arranged at an interval along a first direction, the first region comprises an emitter, and the second region comprises a second electrode; the emitter is electrically connected with the first electrode; the first surface is provided with a suede structure, the surface of the suede structure comprises a top surface and a side surface, the top surface is arc-shaped, the side surface is a curved surface, the surface of the suede structure further comprises a plurality of bulges, the bulges are granular or sphere-like, and the first direction is perpendicular to the thickness of the substrate. The solar cell provided by the embodiment of the invention at least can improve the photoelectric conversion efficiency of the solar cell.

This application relates to the field of solar cell technology, providing a solar cell and its manufacturing method, a tandem cell, and a photovoltaic module, which at least improves the benefit of laser-assisted sintering of sectional cells in terms of contact resistance. The manufacturing method includes: providing a solar cell, the solar cell including opposing first and second surfaces; forming a first grid on the first surface and a second grid on the second surface; irradiating the first surface of the solar cell with a first laser and applying a first voltage to the first and second grids; cutting the solar cell to divide it into at least two sectional cells, and passivating the cut surfaces of the sectional cells; irradiating at least a portion of the first surface of the sectional cells with a second laser and applying a second voltage to the first and second grids; wherein the energy density of the second laser is less than the energy density of the first laser, and / or the second voltage is less than the first voltage.

The present disclosure relates to the technical field of solar cells, and in particular, to a large-area perovskite / silicon-based tandem cell structure and a preparation method therefor. The large-area perovskite / silicon-based tandem cell structure comprises: a silicon substrate cell; a first transport layer located on a side of the silicon substrate cell; a perovskite layer, located on the side of the first transport layer away from the silicon substrate cell; a second transport layer located on the side of the perovskite layer away from the silicon substrate cell; a buffer layer, located on the side of the second transport layer away from the silicon substrate cell; a transparent conductive layer, located on the side of the buffer layer away from the silicon substrate cell, the transparent conductive layer comprising at least one first transparent conductive layer and at least one second transparent conductive layer, the first transparent conductive layer being located between the buffer layer and the second transparent conductive layer, and the density of the first transparent conductive layer being less than the density of the second transparent conductive layer; and electrodes, formed by means of screen printing or inkjet printing on the side of the transparent conductive layer away from the silicon substrate cell.

The present application belongs to the field of perovskite / crystalline silicon tandem cells. Disclosed are a perovskite / crystalline silicon tandem cell and a preparation method therefor. The perovskite / crystalline silicon tandem cell comprises a bottom cell and a top cell, wherein the bottom cell uses a crystalline silicon wafer as a substrate, an interface passivation layer, a first doped silicon layer, a first transparent conductive oxide film layer and a metal conductive film layer are sequentially provided on the back surface of the bottom cell, and an interface passivation layer, a second doped silicon layer and an intermediate composite layer are sequentially provided on the front surface of the bottom cell; the top cell uses a perovskite light-absorbing layer as a light-absorbing layer, a first carrier transport layer is provided on the back surface, and a second carrier transport layer, a second transparent conductive oxide film layer and a metal grid line electrode are sequentially provided on the front surface; and an amorphous germanium layer is provided between the second doped silicon layer and the intermediate composite layer, thereby enhancing the tunneling conductivity between the second doped silicon layer and the intermediate composite layer, reducing the interfacial contact resistance, and improving the FF and conversion efficiency of the cell.

This application relates to the photovoltaic field, providing a solar cell and its fabrication method, a tandem solar cell, and a photovoltaic module. The solar cell includes a substrate; a tunneling dielectric layer located on the surface of the substrate; a doped conductive layer located on the surface of the tunneling dielectric layer; a fluorinated silicon oxide layer located on the surface of the doped conductive layer, the fluorinated silicon oxide layer having a mesoporous structure; a passivation layer located on the surface of the fluorinated silicon oxide layer; and an electrode electrically connected to the doped conductive layer. The solar cell, its fabrication method, the tandem solar cell, and the photovoltaic module provided by this application can at least improve the PID (Potential Influence of Processing) problem.

The invention provides a perovskite laminated cell and a preparation method thereof. The perovskite laminated cell comprises a bottom cell, a tunneling composite layer and a perovskite top cell which are sequentially laminated, the tunneling composite layer comprises a first TCO layer and a second TCO layer which are stacked in sequence; the first TCO layer contains a hydrogen element; the surface of the second TCO layer is provided with hydroxyl groups; the perovskite top cell comprises a first charge transport layer, a perovskite light absorption layer, a second charge transport layer and an electrode which are stacked. The first charge transport layer is connected with the second TCO layer, the first charge transport layer is provided with a passivation group, and the passivation group and a hydroxyl group on the surface of the second TCO layer form a covalent bond. According to the invention, under the synergistic effect of the first TCO layer and the second TCO layer, efficient tunneling recombination can be realized, and the stability and efficiency of a cell device are greatly improved.

This application relates to the field of solar cell technology, and in particular to a solar cell, photovoltaic module, and tandem cell. The solar cell includes a substrate and a passivation layer covering the substrate. The substrate has a first surface and a second surface disposed opposite to each other along the thickness direction. The first surface includes a first textured region and a second textured region. At least one adjacent region of the first textured region and the second textured region is provided with a trench structure. There is no emitter below the second textured region. The trench structure can separate the first textured region and the second textured region, reducing the probability that photogenerated carriers generated at any position in the first textured region will cross the structure and enter the second textured region, thereby reducing the recombination rate of carriers. As a geometric transition design, the trench structure can effectively coordinate the deformation between different textured regions and reduce stress concentration caused by local stiffness differences. The second textured region has a lower doping concentration, which can reduce the recombination probability of carriers and is beneficial to improving photoelectric conversion efficiency.

This application discloses a perovskite / crystalline silicon tandem solar cell, its fabrication method, photovoltaic module, and photovoltaic system. The perovskite / crystalline silicon tandem solar cell includes a crystalline silicon bottom cell, an intermediate connecting layer, and a perovskite top cell stacked sequentially. A first oxide barrier layer is stacked between the crystalline silicon bottom cell and the intermediate connecting layer; a second oxide barrier layer is stacked between the intermediate connecting layer and the perovskite top cell. The density of the first and second oxide barrier layers is greater than that of the intermediate connecting layer. This invention introduces oxide barrier layers with higher density on both sides of the intermediate connecting layer, achieving physical-level material exchange isolation: on the one hand, it can block organic ions migrating from the perovskite from interacting with OH groups in the intermediate connecting layer. ‑ The reaction inhibits the decomposition of the perovskite interface and also prevents the diffusion and escape of hydrogen from the amorphous silicon layer in the bottom cell under stress, thereby significantly improving the stability of the perovskite / crystalline silicon tandem cell.

This disclosure relates to the field of solar cell technology, and more specifically, to a tandem solar cell and its fabrication method. It includes a first solar cell with an N / P selective contact structure and a second solar cell containing alternating electron transport layers and hole transport layers. A selective tunneling dielectric layer is disposed between the N / P selective contact structure and the hole transport layers and electron transport layers; wherein the selective tunneling dielectric layer comprises alternating phosphorus-doped Al. x O y Zone and boron-doped Al x O y The N-region and the electron transport layer are respectively disposed on phosphorus-doped Al. x O y The P-region and the hole transport layer are respectively located on opposite sides of boron-doped Al. x O y The two sides of the area are opposite each other. This tandem solar cell can improve the current matching conditions structurally while maintaining the high energy conversion efficiency of the tandem cell, thereby solving the problem of current mismatch between the top and bottom cells in the aforementioned tandem cell.

Provided in the present invention are a rear-surface-passivated CIGS single-junction cell and interconnected cells thereof and a preparation method therefor, and a CIGS / PVK double-junction tandem cell and a preparation method therefor. The CIGS single-junction cell comprises a substrate, and a back electrode, an absorption layer, a buffer layer, a high barrier layer, a front electrode and grid lines which are sequentially formed, wherein a discontinuous passivation layer is deposited between the back electrode and the absorption layer. The preparation method for the CIGS single-junction cell comprises: depositing a back electrode on a substrate; forming a suspension from nanoparticles, coating the suspension onto the back electrode to form a wet film, and conducting annealing, so as to form a passivation layer; and sequentially depositing an absorption layer, a buffer layer, a high barrier layer, a front electrode layer and grid lines on the passivation layer. The CIGS / PVK double-junction tandem cell comprises a bottom CIGS single-junction cell and a top perovskite cell, the two forming an integral body by means of the interconnection of two or four internal ends thereof. Further provided in the present invention is a passivation method for interconnected CIGS single-junction cells. P1, P2 and P3 scribe lines are arranged inside the CIGS single-junction cell. The rear-surface-passivated cell provided by the present invention reduces rear surface recombination and improves photoelectric efficiency.

This invention discloses a perovskite / crystalline silicon tandem solar cell and its fabrication method, belonging to the field of perovskite / crystalline silicon tandem solar cells. It includes a bottom cell and a top cell. The bottom cell uses a crystalline silicon wafer as a substrate, with an interface passivation layer, a first doped silicon layer, a first transparent conductive oxide film layer, and a metal conductive film layer sequentially disposed on its back side. An interface passivation layer, a second doped silicon layer, and an intermediate composite layer are sequentially disposed on its front side. The top cell uses a perovskite light-absorbing layer as the light-absorbing layer, with a first carrier transport layer disposed on its back side. A second carrier transport layer, a second transparent conductive oxide film layer, and a metal grid electrode are sequentially disposed on its front side. An amorphous germanium layer is disposed between the second doped silicon layer and the intermediate composite layer, enhancing the tunneling conductivity between them, reducing the interface contact resistance, and improving the cell's flyback effect (FF) and conversion efficiency.

The application provides a perovskite crystalline silicon laminated cell and a preparation method and application thereof, and relates to the technical field of solar cells.The perovskite crystalline silicon laminated cell comprises a perovskite top cell, an intermediate interconnection layer and a crystalline silicon bottom cell, and the intermediate interconnection layer is prepared by embedding an Ag metal grid on the surface of a TCO base, and then depositing a TCO layer on the TCO base with the embedded Ag metal grid to form an integrated structure in which the TCO base wraps the Ag metal grid, thereby obtaining the intermediate interconnection layer.The Ag metal grid embedded in the TCO composite layer as the interconnection layer of the laminated cell can enhance the adhesion of the interconnection layer, guarantee the stability and reliability of the cell structure, and the overall structure of the intermediate interconnection layer is also helpful to reduce the electrical loss and enhance the optical performance.

The present disclosure is applicable to the technical field of solar power generation, and provides a TOPCon cell, a photovoltaic module, and a tandem cell. The TOPCon cell comprises a silicon substrate, a tunneling layer, a polysilicon layer, and an aluminum oxide layer. The tunneling layer is disposed on a back surface of the silicon substrate. The polysilicon layer is disposed on a side surface of the tunneling layer away from the silicon substrate. The aluminum oxide layer is disposed on a side surface of the polysilicon layer away from the tunneling layer. The aluminum oxide layer is disposed on at least a portion of the polysilicon layer. In the above arrangement, the aluminum oxide layer is disposed on at least a portion of the polysilicon layer on the rear side of the cell, thereby enhancing the antireflective effect and improving the rear-side conversion efficiency of the cell.

The invention provides a perovskite battery which comprises a substrate and a perovskite layer located on the substrate, the perovskite layer comprises a first crystal grain layer and a second crystal grain layer, the first crystal grain layer is farther from the substrate than the second crystal grain layer, and the first crystal grain layer is in direct contact with the second crystal grain layer and covers the second crystal grain layer. According to the perovskite cell, the first crystal grain layer and the second crystal grain layer included in the perovskite layer are in direct contact and cover the second crystal grain layer, that is, the shapes of crystal grains of the two crystal grain layers can be completely matched, so that the first crystal grain layer can comprehensively and uniformly passivate the second crystal grain layer, and the photoelectric conversion efficiency of the perovskite cell is improved. Besides, the first crystal grain layer covers the second crystal grain layer, so that the second crystal grain layer can be protected from being influenced by other layers, the light absorption performance of the second crystal grain layer is improved, and the photoelectric conversion efficiency of the perovskite cell is further improved. The invention also provides a laminated cell comprising the perovskite cell and a preparation method of the perovskite cell.

The embodiment of the invention relates to the photovoltaic field, and provides a solar cell, a preparation method thereof, a laminated cell and a photovoltaic module, the solar cell comprises a silicon substrate, the silicon substrate comprises a first surface and a second surface which are oppositely arranged, the first surface comprises a first area and a second area which are alternately arranged along a first direction, the second region comprises a first sub-region and a second sub-region which are arranged along a second direction; the first region comprises a first doped region, the first sub-region comprises a second doped region, the second sub-region comprises a third doped region, and the doping concentration of the second doped region is greater than that of the third doped region; and the first metal gate line is electrically connected with the first doped region. The solar cell provided by the embodiment of the invention at least helps to improve the problems of high fragment rate and poor deposition thickness uniformity of silicon nitride and the like caused by bending of a silicon substrate in the prior art.

The application discloses a perovskite / crystalline silicon two-end laminated cell photocurrent prediction method and system, relates to the battery photocurrent calculation technical field, and aims to solve the problem that the perovskite / crystalline silicon two-end laminated cell is inefficient when simulated in a three-dimensional optical model; the method comprises the following steps: taking the perovskite material, band gap and wavelength of the laminated cell as input, and taking the complex refractive index as output to construct a first proxy model; obtaining a first result according to a three-dimensional wave optical model, inputting the first result into a database as sample data; preprocessing the sample data, combining the three-dimensional wave optical model and the artificial neural network trained by combining Bayesian optimization and Bayesian normalization to generate a second proxy model; inputting the full wavelength into the second proxy model to output a predicted wavelength, and then calculating the total photocurrent of the laminated cell; the application establishes an efficient multiple proxy model in a deep learning manner, and can be applied in multiple scenes without a high-configuration computer.

The invention discloses a perovskite crystalline silicon laminated cell with a low temperature coefficient and a preparation method of the perovskite crystalline silicon laminated cell. The cell comprises a crystalline silicon bottom cell, a tunneling layer and a perovskite top cell which are sequentially arranged from bottom to top, the perovskite top cell comprises a perovskite absorption layer, and the perovskite absorption layer is provided with a nanometer support. By implementing the cell provided by the invention, external lattice thermal expansion generated by the perovskite material in a temperature rising process can be effectively inhibited, so that the temperature coefficient of the whole laminated cell device is reduced, and the actual power generation performance of the cell device in a high-temperature environment is improved; the problem that the actual power generation performance of an existing perovskite / crystalline silicon laminated cell is limited due to the fact that the temperature coefficient is too high is solved.

This invention provides a solar cell, its fabrication process, a tandem solar cell, and a photovoltaic module. The fabrication process of the solar cell includes: providing a cell substrate; printing a conductive material onto the cell substrate; and curing the conductive material to form initial grid lines. The conductive material includes bismuth-based lead-free glass; the conductive material also includes copper powder and nickel powder; the mass ratio of copper powder to nickel powder is 80~99.5:0.5~20, and the copper powder includes flake-shaped copper powder and spherical copper powder. In the fabrication process of this invention, the conductive material, through a ternary synergistic system of "copper-nickel-glass" and a dual-morphology copper powder composite design, achieves multiple effects such as suppressing copper diffusion and oxidation and improving adhesion under an air-sintering atmosphere, thereby improving the fill factor and photoelectric conversion efficiency of the solar cell.

The present invention provides a tandem solar cell and a preparation method therefor. The tandem solar cell comprises a plurality of insulating layers arranged in sequence. A first electrode layer, a first light absorption layer, and a first carrier transport layer are sequentially arranged on the right side of each insulating layer from bottom to top. A second electrode layer, a second carrier transport layer, and a second light absorption layer are sequentially arranged on the left side of each insulating layer from bottom to top, the second light absorption layer comprising a plurality of vertical regions and a horizontal region. An upper surface of a third carrier transport layer is in contact with a lower surface of the horizontal region, and a lower surface of the third carrier transport layer is in contact with an upper surface of the first carrier transport layer. The carrier type of the first carrier transport layer is the same as that of the second carrier transport layer, and is opposite to that of the third carrier transport layer. The present invention can improve the device performance and stability of tandem solar cells, such as all-perovskite tandem cells and perovskite / copper indium gallium selenide (CIGS) tandem cells, and has broad application prospects.

The present invention provides a tandem solar cell and a preparation method for the tandem solar cell. The tandem solar cell comprises a front electrode, a first tandem layer, a tunnel recombination layer, a second tandem layer, and a back electrode. A first deposited metal layer is arranged between the front electrode and the first tandem layer, and is used for improving the adhesion between a metal slurry and the cell in the process of preparing a tandem cell electrode at a low temperature, and reducing contact resistance between the cell and the metal slurry, thereby improving the conductivity between the metal electrode and perovskite.

The invention relates to the technical field of solar cells, and discloses a mechanical stacking method of a perovskite-silicon laminated cell, and the mechanical stacking method comprises the steps: enabling a top perovskite cell and a bottom crystal silicon cell to be respectively adsorbed on the two surfaces of a flexible material through electrostatic adsorption, so as to complete the stacking of the top cell and the bottom cell; the adsorption surface of the perovskite cell is the surface of a transparent conductive substrate layer of the perovskite cell, the adsorption surface of the crystalline silicon cell is the surface of crystalline silicon cell packaging glass, and the adsorption surface of the crystalline silicon cell is provided with a hollow metal grid line electrode; and the thickness of the flexible material is 15-40 [mu] m. According to the mechanical stacking method provided by the invention, the problems that the optical cement affects the performance and stability of the perovskite cell, the replacement difficulty of the sub-module in the laminated cell is high, the maintenance cost is high and the optical cement layer causes optical energy loss in the existing optical cement mechanical stacking method are solved.

This invention discloses a multilayer TOPCon structure for the interface of perovskite / silicon tandem solar cells and its fabrication method. The multilayer TOPCon structure comprises, from bottom to top: a silicon substrate, multiple alternating layers of SiO2. x The tunneling layer and the poly-Si doped layer, wherein: SiO x The tunneling layer consists of 1 to 5 layers, with a single layer thickness of 0.8 to 1.2 nm, and SiO₂. x The total thickness of the tunneling layer is ≤3nm; and SiO x The tunneling layer is doped with nitrogen (N), with an N / O atomic ratio of 0.05–0.15; the number of poly-Si doped layers is related to the SiO₂ content. x The tunneling layer is consistent, and the total thickness of the poly-Si doped layer is 60~150 nm. P is used as the main dopant in the poly-Si doped layer, with an average concentration of activated P atoms of 1×10⁻⁶. 20 ~1×10 21 cm ‑3 Furthermore, the P doping concentration in the poly-Si doped layer increases in a gradient from the side closest to the silicon substrate to the side furthest from the silicon substrate. In this invention, the combination of multilayer TOPCon architecture and precise doping modification optimizes the carrier transport between the top and bottom cells, and the multilayer poly-Si structure effectively reduces total optical parasitics and improves the light capture efficiency of the tandem cell.

The invention provides a perovskite crystalline silicon laminated cell and a preparation method and application thereof, and relates to the technical field of solar cells. The preparation method of the perovskite crystalline silicon laminated cell comprises the following steps that a to-be-coated surface a of a silicon substrate of a crystalline silicon bottom cell is polished, then slit coating is carried out to prepare a perovskite top cell, the polishing treatment is that at least one edge of the periphery of the surface of the silicon substrate extends inwards and is polished, and the inward extending distance is smaller than or equal to 2 cm. According to the method, the to-be-coated a surface of the silicon substrate of the crystalline silicon bottom battery is polished, and a cutter inlet area and a cutter outlet area are reserved on at least one edge of the periphery of the surface of the silicon substrate for a cutter head for slit coating, so that the influence of a light absorption layer or a passivation layer on the performance of a device caused by inconsistent thickness of a coating film layer is avoided; and the industrial defect that the silicon wafer enters the knife from the outside is overcome, unnecessary waste of coating liquid medicine is avoided, the production efficiency of mass production of batteries is improved, and the process of large-scale production of perovskite crystal silicon batteries is promoted.

The invention relates to a perovskite crystalline silicon laminated cell, a bottom cell and a preparation method, and the method comprises the steps: obtaining a textured semiconductor substrate layer, and carrying out the boron diffusion of a first surface of the semiconductor substrate layer, and generating a boron-doped layer; carrying out winding plating removal and polishing on the second surface of the semiconductor substrate layer, carrying out secondary texturing to form a textured surface, carrying out deposition in sequence to generate a tunneling oxide layer and an intrinsic polycrystalline silicon layer, and carrying out phosphorus diffusion on the intrinsic polycrystalline silicon layer to obtain an N-type polycrystalline silicon layer; depositing a passivation film layer on the boron-doped layer, carrying out passivation treatment, printing silver paste on the passivation film layer, and carrying out sintering to generate a metal electrode; the transparent conductive layer is generated on the N-type polycrystalline silicon layer, and annealing is carried out after auxiliary sintering is carried out by adopting an LECO technology, so that the open voltage of the bottom cell can be improved, and the conversion efficiency of the cell is improved.

The application discloses a kind of crystalline silicon laminated cell photovoltaic module, belong to solar cell technical field, including bottom plate, the crystalline silicon cell is installed on the bottom plate by lower layer encapsulation adhesive film, the edge at the bottom of the bottom plate is equipped with junction box, the glass cover plate is installed on the crystalline silicon cell by upper layer encapsulation adhesive film, perovskite cell is equipped on the glass cover plate, and four-terminal laminated component is formed after being laminated and being combined, the outer surface of the bottom plate and glass cover plate is equipped with aluminum frame in common;Through the perovskite cell, heat conduction component and controllable air inlet component set, four-terminal laminated structure and "silicon first perovskite" laminating process are realized, perovskite directly contacts high-temperature silicon bottom component is avoided, so that perovskite layer service life is extended, efficiency decay is controlled, and liquid cooling-air cooling dual-mode cooling system adapts to seasonal temperature difference, summer is quickly heat-conducted through circulating coolant, winter heating promotes snow melting, and stable power generation in each temperature range is ensured.

The embodiment of the invention relates to the photovoltaic field, and provides conductive silver paste and a preparation method thereof, a back contact solar cell and a laminated cell. The conductive silver paste comprises the following components in percentage by weight: 80%-90% of silver powder; 2%-7% of organic resin; 3%-8% of a solvent; 0.2%-1% of silicon powder; 1%-2% of a curing agent; 0.5%-1% of a coupling catalyst; 0.1%-1% of an auxiliary agent; the silver powder comprises first silver powder and second silver powder, the particle size of the first silver powder ranges from 1 micrometer to 2 micrometers, and the particle size of the second silver powder ranges from 100 nm to 900 nm. According to the technical scheme provided by the embodiment of the invention, the conductive silver paste at least has the following advantages that the conductive silver paste can complete electrode curing at a relatively low curing temperature, and damage of high-temperature curing to other battery layer materials is avoided.

A III-V tandem cell and a preparation method therefor, relating to the technical field of solar cells. The preparation method for the III-V tandem cell comprises the following steps: using an XBC cell as a substrate, and sequentially depositing a substrate layer, a tunnel junction layer, a back surface field layer, a body layer, a window layer and an antireflection layer on the front surface of the XBC cell, wherein the tunnel junction layer comprises a GaInP layer and an AlGaAs layer which are sequentially deposited. The method for preparing the III-V tandem cell uses a multi-tunnel junction structure to enhance the passivation effect, thereby improving the cell efficiency.

This disclosure relates to the photovoltaic field, providing a photovoltaic cell and its manufacturing method, a tandem cell, and a photovoltaic module. The photovoltaic cell includes: a substrate having two surfaces disposed opposite each other along a first direction, and a plurality of side surfaces connecting the two surfaces, the first direction being the thickness direction of the substrate; a passivation layer located in at least a portion of at least one side surface, the passivation layer having two ends opposite each other along the first direction, at least one end having a through hole connecting to the substrate, and the surface located on the same side as the end having the through hole includes a central region and an edge region surrounding the central region; an edge electrode located in the central region and the edge region; a first conductive portion filling the through hole and connected to the substrate; and a second conductive portion located in the edge region and connected to the edge electrode, which at least helps to improve the carrier collection efficiency of the photovoltaic cell.

This application relates to the field of solar cell technology, and more particularly to a solar cell, a tandem cell, and a photovoltaic module. The first textured structure of the metallized region includes a raised structure, which includes at least a platform structure. The platform structure includes a side surface and a top platform with micro-pyramids. Both the side surface and the micro-pyramids reflect incident light, which is beneficial to improving the absorption capacity of long-wavelength light. Furthermore, the combination of the side surface and the micro-pyramids helps to reduce the number of relatively large sharp peaks, reduces surface defects, and facilitates the deposition of a passivation layer, thereby reducing the recombination probability of charge carriers and improving the photoelectric conversion efficiency of the solar cell. At the same time, the top platform with micro-pyramids can also allow the electrode paste to fully fill the gaps, increasing the contact area between the electrode and the substrate, which helps to reduce the contact resistance and improve the charge carrier collection efficiency, thereby improving the photoelectric conversion efficiency.

The application provides a perovskite solar cell, a preparation method thereof and a stacked cell, and the perovskite solar cell comprises: a silicon substrate, the silicon substrate has a first surface, and the first surface has a pyramid structure; and a perovskite thin film located on the first surface, the perovskite thin film comprises a plurality of perovskite grains and a plurality of secondary phase grains, the perovskite grains grow in an orientation along a first direction, the first direction is perpendicular to the first surface, the secondary phase grains are embedded at grain boundaries between two adjacent perovskite grains, and the size of the perovskite grains is greater than the size of the secondary phase grains. The application solves the problem of poor conformal coverage of the perovskite thin film in the perovskite solar cell in the prior art.