49 results about "Solar cell efficiency" patented technology

The invention relates to the field of solar cells, and provides a solar cell and a preparation method of the solar cell. The solar cell comprises a substrate, the substrate is provided with a first surface and a second surface which are opposite, and the second surface is provided with a groove; the first doped conductive layer is positioned on the first surface or the second surface on at least one side of the groove; the second doped conductive layer is at least partially located in the groove, and the doping type of the first doped conductive layer is different from that of the second doped conductive layer; the first electrode is positioned on one side, far away from the substrate, of the first doped conductive layer and is in contact with the first doped conductive layer; and the second electrode is at least partially positioned on one side, far away from the substrate, of the second doped conductive layer in the groove. The solar cell solves the technical problem of how to improve the efficiency of the solar cell in the prior art.

The invention provides a solar cell and a photovoltaic module, and belongs to the technical field of solar cells. The solar cell comprises a silicon substrate, the silicon substrate comprises two opposite surfaces, at least one surface is provided with a first texture structure, and the first texture structure is a non-pyramid texture structure and comprises a plurality of sunken parts which are sunken towards the interior of the silicon substrate; the convex parts are located between the adjacent concave parts, and at least part of the convex parts are provided with divergent broken line structures or curve structures in the direction from the convex parts to the concave parts. The first texture structure on the surface of the silicon substrate is beneficial to considering the light trapping effect when the silicon substrate is applied to a light receiving area, the electric contact performance of a non-light receiving area and the quality of a film layer located on the surface of the silicon substrate, so that the efficiency and the double-sided rate of the solar cell are improved.

The embodiment of the utility model provides a solar cell, a photovoltaic module and a photovoltaic system, the solar cell comprises a first surface and a second surface which are opposite to each other, and a side surface located between the first surface and the second surface, and the side surface is provided with a first area close to the first surface and a second area close to the second surface; a first tunneling oxide layer, a first doped polycrystalline silicon layer and a first antireflection layer are sequentially stacked on the first region; and a first intrinsic amorphous silicon layer, a first doped microcrystalline silicon layer and a second antireflection layer are sequentially laminated on the second region. According to the embodiment of the invention, the edge passivation can be enhanced, the efficiency of the solar cell is improved, the edge winding plating of the tunneling oxide layer and the doped polycrystalline silicon does not need to be removed, the etching process is reduced, and the production cost is reduced.

The present invention relates to a post-treatment method for preventing cell degradation, whereby the problem of reduced solar cell efficiency due to the thermal degradation of cells that inevitably occurs during the manufacturing process of perovskite-based solar cell modules can be prevented or minimized; and a perovskite-based solar cell post-treated by said method.

The invention discloses a four-end laminated solar cell based on ultra-wide-band-gap perovskite and a preparation method of the four-end laminated solar cell. The four-end laminated solar cell based on the ultra-wide-band-gap perovskite comprises a top cell and a bottom cell, wherein the top cell is an ultra-wide-band-gap perovskite solar cell of which the band gap is not less than 2.0 eV. According to the invention, the problem of low utilization rate of the bottom cell in the existing perovskite-based four-terminal laminated cell can be solved, and the overall photoelectric conversion efficiency of the solar cell can be synergistically improved. According to the invention, the band gap characteristic of the ultra-wide band gap perovskite solar cell is used, and high-energy photons are fully absorbed and utilized to generate high open-circuit voltage; meanwhile, the light absorption of the bottom cell can be enhanced, and the photoelectric conversion efficiency of the bottom cell is effectively exerted; in addition, the damage of ultraviolet rays to the performance of the bottom cell is avoided. Therefore, the efficiency and the stability of the solar cell can be synergistically improved, and the application prospect is good.

The invention belongs to the field of solar cell materials, and provides a compound shown in a formula I and capable of serving as a light conversion material, a light conversion adhesive film containing the compound shown in the formula I, a preparation method, a solar cell module and a method for enhancing efficiency and / or stability of a solar cell. The light conversion adhesive film containing the light conversion material can be used for solar cells (especially TOPCon cells and TBC cells) so as to enhance the efficiency and / or stability of the cells.

The present invention provides a solar cell and photovoltaic module. The solar cell comprises: an N-type substrate; an isolation structure located on a first surface; a doping structure; a first passivation layer; and a plurality of first electrodes. The doping structure comprises a first P-type doped emitter and a second P-type doped emitter, the second P-type doped emitter being located in a metal contact region; the isolation structure being located between two adjacent second P-type doped emitters, the isolation structure being used to isolate the first electrode from the N-type substrate; the first P-type doped emitter being located in a non-metallic contact region; the first passivation layer being located on a side of the doping structure in the non-metallic contact region away from the N-type substrate; and the first electrode being located on a side of the isolation structure away from the N-type substrate. Furthermore, the solar cell comprises a second tunneling dielectric layer, a second doped conductive layer, a second passivation layer, and a plurality of second electrodes located on a second surface. This solar cell solves the prior art technical problem of improving solar cell efficiency.

The invention belongs to the field of solar cell materials, and provides a light conversion material, application thereof, a light conversion adhesive film containing the light conversion material, a preparation method of the light conversion adhesive film, a solar cell module and a method for enhancing efficiency and / or stability of a solar cell. The light conversion material is a compound shown as a formula I, and the definition of each group in the compound shown as the formula I is described in the specification. The light conversion adhesive film containing the light conversion material can be used for a solar cell to enhance the efficiency and / or stability of the cell.

The invention provides a wide-band-gap perovskite battery and a preparation method thereof. The wide-band-gap perovskite cell comprises a perovskite absorption layer, a dielectric passivation layer and a charge transport layer which are stacked in sequence. The perovskite absorption layer is doped with an organic amine salt, the chemical formula of the organic amine salt is nM-PAHs-RNH3X, n is 1-5, M is an electron withdrawing group, PAHs is aryl, R is C1-C4 alkyl or H, and X is any one selected from F, Cl, Br and I; the material of the dielectric passivation layer comprises a Lewis basic compound. Organic amine salt doping is combined with the Lewis alkaline dielectric passivation layer, so that perovskite energy level matching is optimized, interface defects are reduced, and the efficiency of the solar cell is remarkably improved; and meanwhile, a large number of dielectric layers do not need to be arranged to realize energy level matching, and the preparation process of the wide-band-gap perovskite cell is simplified.

The invention provides a solar cell sintering method and a solar cell obtained through the solar cell sintering method, and relates to the technical field of solar cells. The sintering method of the solar cell comprises the following steps of: printing P fine grid slurry on a cell piece, and sintering for the first time; printing N fine grid slurry, and sintering for the second time; and finally printing the main grid slurry, and performing third sintering to obtain the solar cell. According to the sintering method, a step-by-step sintering mode is adopted, the contact effect of metal of the P region, the N region and the main grid region and the silicon wafer is improved, and the efficiency and the process yield of the solar cell can be effectively improved.

The invention discloses a perovskite solar cell based on hole transport layer solvent engineering and a preparation method thereof. The preparation method comprises the following steps: preparing a hole transport layer precursor solution of the perovskite solar cell by using a mixed solvent of chlorobenzene (CB), ethyl acetate (EA) and 4-tert-butylpyridine (TBP); the optimal solvent formula is obtained by regulating and controlling the solvent proportion, and the high-quality organic hole transport layer thin film is prepared by using the spin-coating method, so that the efficiency and the stability of the perovskite solar cell are greatly improved, and the high-performance perovskite solar cell is further obtained. A new thought and a new method are provided for promoting industrial production and commercial application of the perovskite solar cell.

The utility model provides a solar cell and a photovoltaic module, and the cell comprises a substrate which is provided with a front surface, a back surface and a side surface; the emitter layer is located on the front surface, and the doping type of the emitter layer is opposite to that of the substrate; the first passivation layer is located on the side, away from the substrate, of the emitter layer; the first electrode is electrically connected with the emitter layer; the tunneling dielectric layer is positioned on the back surface; the doped conductive layer is located on one side, away from the substrate, of the tunneling dielectric layer, and the doping type of the doped conductive layer is the same as that of the substrate; the second passivation layer is located on the side, away from the substrate, of the doped conductive layer; the second electrode is electrically connected with the doped conductive layer; and at least one conductive structure in contact with the emitter layer and the doped conductive layer, respectively. The conductive structure can replace a current flowing path of the battery to normally transmit most of current from the doped conductive layer to the emitter layer, the generating capacity and the power of the battery are not greatly influenced, and the problem that the battery efficiency is low when the battery generates a hot spot effect is solved.

The invention relates to a passivation solution, a perovskite solar cell, a preparation method of the perovskite solar cell, a photovoltaic module and an electric device. The passivation solution comprises a passivation material and a mixed solvent, the mixed solvent comprises a first solvent, a second solvent and a third solvent, the first solvent comprises alcohol, the second solvent comprises cyclic carbonyl, the third solvent comprises at least one of chlorobenzene, methylbenzene, acetonitrile, dichloromethane and ethyl acetate, and the boiling point of the second solvent is higher than that of the third solvent. The third solvent with a low boiling point preferentially volatilizes to help initial positioning of the passivation material, the second solvent with a high boiling point delays volatilization, and the second solvent comprises a cyclic carbonyl group and is matched with the first solvent alcohol, so that sufficient adsorption and ordered arrangement of the passivation material can be promoted, meanwhile, the second solvent is prevented from being left, and the three solvents are matched with one another. The uniformity of the formed passivation layer can be effectively improved, the interface compatibility with the perovskite light absorption layer is good, the interface potential barrier is effectively improved, the efficiency of the perovskite solar cell is improved, and the service life of the perovskite solar cell is prolonged.

The invention discloses a solar cell passivation structure and a preparation method and application thereof. The preparation method comprises the following steps: preparing an aluminum oxide film layer on a substrate; the method for preparing the aluminum nitride film layer on the surface of the aluminum oxide film through the PECVD technology comprises the steps that the PECVD technology is adopted, a first aluminum nitride film layer is prepared on the surface of the aluminum oxide film layer under first power, and then a second aluminum nitride film layer is prepared on the surface of the first aluminum nitride film layer under second power larger than the first power. According to the method, the first aluminum nitride film layer is prepared on the surface of the aluminum oxide film layer through low-power PECVD, so that the aluminum oxide film layer can be protected, the situation that the efficiency and the production reject ratio of a solar cell are reduced due to the fact that the aluminum oxide film layer is damaged by too high power is prevented, and the production efficiency and the device efficiency are improved; and the passivation structure is constructed by compositing the aluminum nitride film layer and the oxide film layer prepared by adopting the step-by-step power, so that the passivation effect of the passivation structure can be effectively improved, and the efficiency of the solar cell is improved.

Disclosed herein is a solar deck system comprising a plurality of planks configured to form a deck or patio structure, each plank including at least one recess receiving a solar cell and a transparent covering flush with the walking surface. The solar cells are electrically interconnected and operably coupled to at least one energy storage unit for collection and use of generated electrical power. Each plank further incorporates a cooling array disposed beneath the solar cell, the array comprising cooling tubing embedded in an aluminum heat sink and fluidly connected between storage tanks. Circulating fluid absorbs excess heat to maintain solar cell efficiency and longevity while capturing recoverable thermal energy. Stored thermal energy may be directed to a heat pump, while stored electrical energy may power residential or commercial loads and auxiliary components. The integrated system enables efficient, modular, and optionally off‑grid energy generation directly from a deck installation.

The present application relates to the technical field of solar cell manufacturing. Specifically, a solar cell and a manufacturing method thereof are provided. The solar cell assembly comprises a solar cell piece, the solar cell piece comprising a surface conductive layer and a current collection structure on the surface of the surface conductive layer; a polarizing structure arranged on the surface of the current collection structure and corresponding to the position of the current collection structure; the polarizing structure is adapted to deflect the incident light directly incident on the current collection structure and make the incident light enter the area between adjacent current collection structures; and an encapsulation film layer covering the surface of the surface conductive layer and encapsulating the current collection structure and the polarizing structure. The solar cell and the manufacturing method thereof can effectively solve the problem of unsatisfactory solar cell efficiency caused by the grid lines blocking the incident light.

The application belongs to the technical field of semiconductor devices, and discloses a solar cell based on a perovskite film capable of inhibiting lead leakage and a preparation method thereof. A small molecule 3-MBA is used as a bifunctional Lewis base additive to be introduced into a perovskite precursor solution to prepare a perovskite film capable of inhibiting lead leakage and a solar cell. 2+ The sulfur atom of the thiol group and the oxygen atom of the carbonyl group in the 3-MBA provide two sites Pb 2 Passivation significantly improves the bonding strength and adhesion of lead in the perovskite structure, inhibits lead leakage of the perovskite solar cell, and enhances the stability of the device. In addition, due to the strong interaction between 3-MBA and the self-assembled monolayer, the influence on the device efficiency is small while inhibiting lead leakage. Experimental results show that the efficiency of a solar cell with an active area of 1cm 2 can reach 24.1%, and can present an environmental stability of more than 1900 hours at a temperature of 22 degrees and a humidity of 45%.

This invention provides a solar cell, comprising: a substrate layer including a side surface and opposing first and second surfaces, including a first region and a second region; the first surface having an emission structure, a first passivation layer, a first plating layer, and a first electrode; a tunneling dielectric layer, a doped conductive layer, a second passivation layer, a conductive transport layer, and a second electrode located on the second surface; the second surface having a groove located in the second region, with a portion of the second passivation layer and a portion of the conductive transport layer located within the groove; the doped conductive layer located on the side of the tunneling dielectric layer away from the substrate layer; the conductive transport layer located on the side of the second passivation layer away from the substrate layer; and the second electrode located on the side of the doped conductive layer away from the substrate layer; a third passivation layer and a second plating layer located on the side surface, with the second plating layer located on the side of the third passivation layer away from the side surface. This solar cell solves the technical problem of improving solar cell efficiency.

The present invention relates to a back-contact solar cell and a method for fabricating the same. The method includes forming a porous lattice in a tunnel layer located in a first region on the backside of a silicon wafer having a first region and a second region, and forming a doped polysilicon layer on the surface of the tunnel layer facing away from the silicon wafer, with the doping concentration gradually decreasing in the direction away from the tunnel layer. In this application, forming multiple holes in the tunnel layer creates carrier tunneling paths within the tunnel layer, while doped atoms in the doped polysilicon layer form atomic-level "pinholes" on the surface of the tunnel layer, thereby reducing tunnel contact resistance. Furthermore, the region of the doped polysilicon layer in contact with the tunnel layer has the highest doping concentration, which, together with the tunnel layer, forms a higher asymmetric shift barrier layer, allowing majority carriers to pass through but blocking minority carriers. This allows for more uniform and smooth collection of majority carriers, enhancing the passivation effect and further improving solar cell efficiency.

The application relates to the technical field of perovskite photovoltaics, and discloses a polysiloxane polymer and a preparation method thereof, a perovskite thin film and a preparation method and application thereof, and a solar cell and application thereof. The polysiloxane polymer has a three-dimensional branched molecular structure and can realize chelation in multiple directions and multiple tooth sites. The preparation method comprises the following steps: in the presence of an inert atmosphere, tetraethyl orthosilicate and butenedioic acid are subjected to ester exchange polycondensation reaction to obtain a multi-tooth chelated hyperbranched polysiloxane polymer. In addition, the multi-tooth chelated hyperbranched polysiloxane polymer can be introduced into a perovskite thin film bulk phase, so that the defects of a perovskite material can be more effectively passivated, and the improvement of the efficiency and stability of a perovskite solar cell is further realized.

The application provides a preparation method of a solar cell grid line, including: a cell piece precursor has a to-be-slotted film layer, a plurality of to-be-slotted areas in the to-be-slotted film layer are arranged at intervals of a respective center line distance D; a laser transfer carrier plate includes a plurality of first transfer areas arranged at intervals of a distance k, k is equal to D-d, k>0, each first transfer area has a guide plate part and a filling groove which are connected and have a same width d; the center line of one guide plate part is aligned with the center line of one to-be-slotted area; laser slotting, a first laser beam emitted by a laser passes through the guide plate part to slot the to-be-slotted area to form a slot with a width of d in the to-be-slotted film layer; grid line transfer, the laser transfer carrier plate is moved horizontally along a first direction by a distance d, slurry in the filling groove is transferred to the slot by laser transfer, one grid line transfer is completed, and the laser is moved horizontally along a second direction by a distance D; the steps of laser slotting and grid line transfer are repeated. The method reduces cell surface damage and recombination, reduces cost, and improves solar cell efficiency.

This application relates to a battery cell efficiency testing device. The testing device includes an adsorption mechanism, a telescopic mechanism, and a translation mechanism. The adsorption mechanism includes a mounting plate, a piston, and a suction cup. An adsorption chamber is formed within the mounting plate. The piston is slidably disposed within the adsorption chamber along a first direction, dividing the adsorption chamber into a first chamber and a second chamber. The first chamber is connected to the outside atmosphere. The suction cup is disposed at one end of the mounting plate along the first direction, and its suction end is connected to the second chamber. The adsorption mechanism is located at the telescopic end of the telescopic mechanism, which drives the adsorption mechanism to move along the first direction. The telescopic mechanism is mounted on the translation mechanism, which drives the telescopic mechanism to move along a second direction. In other words, the adsorption mechanism of this application creates a negative pressure environment through piston movement, allowing the suction cup to adsorb the battery cell, thus preventing damage to the battery cell when the robotic arm grasps it.

The invention relates to the technical field of perovskite photovoltaics, and discloses a polysiloxane polymer and a preparation method thereof, a perovskite thin film and a preparation method and application thereof, and a solar cell and application of the solar cell. The preparation method comprises the following steps: in the presence of an inert atmosphere, carrying out transesterification condensation polymerization on tetraethyl orthosilicate and butenedioic acid to obtain the polydentate chelated hyperbranched polysiloxane polymer. Besides, the multi-tooth chelated hyperbranched polysiloxane polymer can be introduced into a perovskite thin film bulk phase, so that the defects of the perovskite material can be more effectively passivated, and the efficiency and stability of the perovskite solar cell are further improved.

The application relates to a method for improving the efficiency and stability of a perovskite solar cell, which comprises the following steps: preparing an organic interface layer on a charge transport layer, and then preparing a perovskite active layer on the organic interface layer, wherein the charge transport layer is an inorganic p-type semiconductor hole transport layer or an inorganic n-type semiconductor electron transport layer, and the organic interface material in the organic interface layer is selected from one of the following structures. The method based on the application solves the problems of poor efficiency and stability of the perovskite solar cell in the prior art.

The present invention provides an all-inorganic CsPbBr3 perovskite solar cell based on multifunctional polymer-modified SnO2 and its application. An electron transport layer is prepared by spin-coating a SnO2 quantum dot solution with polyacrylic acid on FTO. A PAA layer is coated on the electron transport layer as a pre-buried bottom interface. A CsPbBr3 layer is formed on the PAA layer by a multi-step spin coating method. A carbon electrode is coated on the surface of the CsPbBr3 layer to prepare a solar cell. The present invention uses PAA to hinder the aggregation of SnO2 quantum dots in the solution, thereby obtaining a high-quality electron transport layer. The PAA layer can passivate the uncoordinated Sn on the surface of the electron transport layer. 4+ and the uncoordinated Pb in the CsPbBr3 layer 2+ The solar cell of the present invention has high efficiency and good stability, and has practical and economic value in promoting the industrialization of perovskite solar cells.

The present invention relates to a post-processing method for preventing degradation of a cell and a perovskite-based solar cell post-processed by the method. The method can prevent or minimize a problem of a decrease in solar cell efficiency caused by cell thermal degradation inevitably occurring during a manufacturing process of a perovskite-based solar cell module.

The utility model discloses a device for improving solar cell efficiency through low-temperature rapid pretreatment, and belongs to the technical field of solar cells, the device comprises a device shell, a conveyor belt and an ultraviolet light-emitting device, the conveyor belt penetrates through the device shell, the ultraviolet light-emitting device is arranged in the device shell, and a TOPCon solar cell is placed on the conveyor belt. Compared with the prior art, the low-temperature rapid ultraviolet radiation pretreatment can replace a light injection annealing process, the equipment cost and the electric power cost are reduced, and the low-temperature rapid ultraviolet radiation pretreatment can break weak Si-H bonds in the battery and improve the passivation performance of the battery, so that the efficiency of the battery is improved, and the UV attenuation resistance of the TOPCon solar battery and the assembly can be improved.

A kind of grid line preparation method for silicon heterojunction solar cell efficiency improvement and cost reduction belongs to solar cell field. Grid line pattern is formed on the substrate deposited with silicon nitride by laser, after removing loss layer after alkali washing process, then depositing passivation layer and back field layer can effectively avoid the passivation layer damage problem caused by laser, and avoid the parasitic absorption of front amorphous silicon layer and TCO.

A new type of PV cell is comprised of a purposefully unique spatial configuration of multiple pairs of transparent thin PV films stacked top down in order of decreasing bandgaps corresponding to increasing wavelengths. Each thin-film pair is made of a material of desirable bandgap, and consecutive films separated from each other in space by a layer of air to force confinement of light waves of wavelength matching bandgap, enabling an infinite number of reflections until the wave energy corresponding to each desired wavelength is absorbed. The PV thin-films are coated to ensure that light of each wavelength is confined as intended. They are passivated to minimize surface recombination. This spatial arrangement provides multiple opportunities for photovoltaic conversion of each intended wavelength hence increasing overall conversion efficiency.

The invention discloses an application of a europium ion induced nano aggregate in enhancing the efficiency of a solar cell, which is characterized in that an Eu < 3 + > induced polystyrene-polyacrylic acid block polymer nano aggregate EIPA is used as a luminescence center and is doped into an electron transport layer of the organic solar cell, so that the Eu < 3 + > induced polystyrene-polyacrylic acid block polymer nano aggregate EIPA is formed. The electron transport layer is optimized to obtain higher performance and stability of the organic solar cell. The EIPA has non-polar and polar amphiphilic properties, can improve the interface between the traditional electron transport layer and the active layer and the interface between the traditional electron transport layer and the electrode after modification, has better interface compatibility and is beneficial to electron extraction and transmission at the interface, the spherical structure of the EIPA enables the EIPA to reflect more light, and the light reflected to the active layer can be absorbed. The light absorption of the cell is enhanced to a certain extent, the photocurrent density and filling factors of a photovoltaic device prepared by doping the organic solar electron transport layer material with the organic solar electron transport layer material are improved, and the efficiency is further effectively improved.