Zhejiang Jinko Solar Patente

A back-contact cell and a photovoltaic module are provided. The back-contact cell includes: a cell base; a plurality of busbars, at least one edge pad, a plurality of intermediate pads, at least one first interconnect line, a plurality of second interconnect lines, which are disposed on the cell base. The plurality of busbars include two edge busbars and a plurality of intermediate busbars positioned between the two edge busbars. A respective edge pad of the at least one edge pad is closest to and electrically connected to one of the two edge busbars via a respective one of the plurality of first interconnect line, intermediate pads in a respective column are in direct contact with a respective intermediate busbar, a respective edge busbar of the two edge busbars is electrically connected to at least one intermediate busbar of the plurality of intermediate busbars via one or more second interconnect lines.

The present disclosure provides a photovoltaic module, including a cell string. The cell string includes cells, including an N-type silicon substrate which includes a first side and a second side. The first side includes a first region and a second region distributed alternately. The first region is provided with a boron-doped silicon structure. The second side includes a third region and a fourth region distributed alternately. The third region is provided with a tunneling oxide layer and a phosphorus-doped conductive layer. The cell includes a first surface and a second surface, and includes a first electrode disposed on the first surface and a second electrode disposed on the second surface. A plurality of first cells and a plurality of second cells are disposed alternately. The first surface of the first cell and the second surface of the second cell are located on a same side. The first electrode of the first cell is connected to the second electrode of the adjacent second cell through a solder strip. The second electrode of the first cell is connected to the first electrode of the adjacent second cell through the solder strip. Such an arrangement improves the photoelectric conversion efficiency and the output power of the photovoltaic module.

Embodiments of the present disclosure relate to a solar cell and a photovoltaic module. The solar cell includes a thin-film solar cell and a bottom cell stacked in a first direction. The bottom cell includes: a transparent conductive layer, a first doped conductive layer, an intrinsic amorphous silicon layer, a substrate, a second doped conductive layer, and one or more electrodes that are stacked in the first direction. The transparent conductive layer is between the thin-film solar cell and the first doped conductive layer, and the one or more electrodes are formed on a side of the second doped conductive layer away from the substrate and are in ohmic contact with the second doped conductive layer. The first doped conductive layer includes a doped amorphous silicon layer or a doped microcrystalline silicon layer. The solar cell is at least conducive to reduction of the collection loss of carriers of the solar cell and improvement of photoelectric conversion efficiency of the solar cell.

The present disclosure relates to a solar cell and a tandem solar cell. The solar cell includes a substrate, a tunnel dielectric layer, a doped conductive layer and at least one first electrode. A first surface of the substrate includes metallization regions and non-metallization regions. The metallization region is provided with a first texture structure, the first texture structure includes a first recess. The non-metallization region is provided with a second texture structure, the second texture structure includes a second recess. An average one-dimensional size of a bottom surface of the first recess is smaller than an average one-dimensional size of a bottom surface of the second recess. The metallization region includes first regions and second regions, the first regions are arranged at intervals in a first direction, the second regions are connected between adjacent first regions, and the second regions are arranged at intervals in a second direction. The tunnel dielectric layer is arranged on a surface of the first texture structure. The doped conductive layer is arranged on a side of the tunnel dielectric layer away from the substrate. The first electrode includes a plurality of finger electrodes, and the finger electrodes are electrically connected with the doped conductive layer and arranged corresponding to the first regions, so as to facilitate the improvement of the photoelectric conversion efficiency of the solar cell.

Provided are a solar cell and a photovoltaic module. The solar cell includes a substrate, a passivation layer and a light-transmitting layer. The passivation layer is located on a side of the passivation layer facing a light-receiving surface. The light-transmitting layer is arranged on a side of the passivation layer away from the substrate. The light-transmitting layer includes an adhesive film layer, light-converting particles, and anti-reflection particles. The light-converting particles and the anti-reflection particles are arranged over the passivation layer through the adhesive film layer. An average diameter of the anti-reflection particles is less than or equal to that of the light-converting particles.

Provided are a solar cell, a tandem solar cell and a photovoltaic module. The solar cell includes a substrate, a tunneling layer, a doped conductive layer, a first passivation layer, a first anti-reflection layer and first finger electrodes. A first surface of the substrate includes a first region and a second region. The first region includes first sub-regions. The tunneling layer is formed over the first region. The doped conductive layer is formed over a side of the tunneling layer away from the substrate. The first passivation layer is formed over a side of the doped conductive layer away from the tunneling layer and over the second region. The first anti-reflection layer is formed over a side of the first passivation layer away from the substrate. The first finger electrode is disposed at the first sub-region. At least one of the first finger electrodes is electrically connected to the doped conductive layer. A distance L1 between the first finger electrode and an edge of the first sub-region corresponding to the first finger electrode in the first direction is in a range of 50µm≤L1≤800µm. Such a design can reduce the optical parasitic absorption of the doped conductive layer while ensuring the performance of lateral transport of carriers, thereby improving the photoelectric conversion efficiency of the solar cell.

In a solar cell, first and second doped portions are alternatingly arranged along a first direction, disposed on a first surface of a substrate, and have different conductivity types. Each first doped portion includes first and second portions alternatingly arranged along a second direction, and a dopant concentration of the second portions is greater than that of the first portions. A passivation layer is disposed on the first surface. Fingers are disposed on the first surface, extend through the passivation layer, and include multiple rows of first fingers and multiple rows of second fingers that are alternatingly arranged along the first direction. First fingers in a same row are arranged at intervals in the second direction, and second fingers in a same row are arranged at intervals in the second direction. At least a portion of the first fingers is disposed on a corresponding ones of the first portions, and two adjacent first fingers in the second direction are connected to each other via a corresponding one of the second portions. At least a portion of the second fingers is disposed on a corresponding ones of the third portions. First and second busbars are alternatingly arranged in the second direction, extend along the first direction, and are disposed on the passivation layer. At least a portion of each second busbar is disposed over a column of second portions arranged along the first direction, the first and second busbars are connected to the first and second fingers, respectively.

Provided are a solar cell, and a photovoltaic module. The solar cell includes a substrate, a dielectric layer, a doped semiconductor layer, a passivation layer, and electrodes. The substrate has a first surface. The first surface includes a center region and an edge region surrounding the center region. The edge region is substantially flush with or closer to the second surface than the center region. The dielectric layer is formed over the center region. The passivation layer covers the edge region and a surface of the doped semiconductor layer facing away the dielectric layer. The electrodes are located in the center region, and penetrate the passivation layer to be in electrical contact with the doped semiconductor layer. The center region includes P-regions and N-regions arranged alternatingly, and spacer regions, and a spacer region of the spacer regions is between a P-region and an N-region adjacent to each other.

Disclosed are a solar cell, a tandem solar cell, and a photovoltaic module. The solar cell includes a substrate, a doped semiconductor layer, a passivation layer and a plurality of electrodes. The substrate is provided with textured structures on a portion of a surface of the substrate. The doped semiconductor layer is disposed on the substrate. The solar cell further includes holes extending through the doped semiconductor layer, and corresponding, respectively, to the textured structures, and a bottom of a respective hole exposes at least a portion of a corresponding textured structure. The passivation layer is formed over a surface of the doped semiconductor layer away from the substrate, fills the holes. The plurality of electrodes are arranged along a first direction, pass through the passivation layer and are in electrical contact with the doped semiconductor layer.

A solar cell includes a substrate having a front surface and a back surface disposed opposite to each other; the back surface of the substrate includes a first doped region and a second doped region, and an insulating region; a doped polysilicon passivation contact structure disposed in the first doped region, a doped amorphous silicon structure disposed in the second doped region, and a passivation layer disposed in the insulating region; the doped polysilicon passivation contact structure including a tunneling oxide layer and a doped polysilicon layer; the doped amorphous silicon structure including a doped amorphous silicon layer, and the doped polysilicon layer and the doped amorphous silicon layer having different doping types; wherein the passivation layer is not overlapped with the doped polysilicon passivation contact structure or the doped amorphous silicon structure along a thickness direction of the substrate.

The present disclosure relates to a photovoltaic cell preparation method, and a photovoltaic cell. The method includes: preparing a substrate including a first surface and a second surface opposite to each other, wherein the first surface is a textured structure; placing the substrate into an ALD deposition chamber; sequentially depositing an aluminum-silicon layer and an alumina layer on the first surface; placing the substrate having the aluminum-silicon layer and the alumina layer into a PECVD deposition chamber; depositing a silicon nitride layer on the alumina layer; feeding ammonia gas into the PECVD deposition chamber, and turning on a radio frequency power supply to ionize hydrogen ions from the ammonia gas; and diffusing the hydrogen ions into the aluminum-silicon layer. The aluminum-silicon layer forms an aluminum-silicon bond on the first surface of the substrate, hydrogen ions are diffused to the aluminum-silicon layer to form an aluminum-hydrogen bond. When ultraviolet light is irradiated to the surface of the photovoltaic cell, the aluminum-hydrogen bond can reduce the possibility of damage caused by ultraviolet light to the silicon-hydrogen bond on the surface of the silicon layer, so that the chemical passivation loss of the photovoltaic cell is reduced, thereby improving the conversion efficiency.

Provided is a photovoltaic module, including a first intermediate busbar having a first lead-out terminal provided at an end thereof; a second intermediate busbar having a second lead-out terminal provided at an end thereof; and a first jumper wire arranged on a first isolation bar; the first lead-out terminal and the second lead-out terminal are located on two opposite sides of the first jumper wire, and the first lead-out terminal and the second lead-out terminal abut against two opposite side surfaces of the first isolation bar or overlap a top surface of the first isolation bar. Compared with the related art, the first isolation bar where the first jumper wire is located is clamped or pressed by the first lead-out terminal and the second lead-out terminal, to prevent short circuit or shielding of the cell caused by free movement of the first jumper wire, the first and second intermediate busbars.

A photovoltaic cell includes: a first surface, a second surface opposing the first surface, and a third surface connecting the first surface with the second surface; a passivation layer, formed over the third surface, wherein the passivation layer comprises a metal oxide, and the metal oxide comprises at least one metal element of Al, Ti, Zn, Zr, Hf, Mo, W, and Ni; and a protective layer, formed on a side of the passivation layer away from the third surface, wherein the protective layer comprises a nitride, and the nitride comprises one element from Group III elements.

Provided are a method for manufacturing a solar cell, a solar cell and a photovoltaic module. The method includes: providing an N-type silicon substrate having a front surface and a rear surface opposite to the front surface; forming a tunneling dielectric layer and a doped conductive layer sequentially on the rear surface in a direction away from the rear surface; forming a passivation layer over the front surface; forming a first antireflection layer including a silicon nitride material on the passivation layer; forming a second antireflection layer including a silicon oxynitride material on the first antireflection layer; and forming a third antireflection layer including a silicon oxide material and nitrogen on the second antireflection layer.

Disclosed is a method for manufacturing solar cell (100). The method includes: providing a solar cell substrate (110); forming a first initial electrode (e1) on the solar cell substrate (110); and controlling a laser (L) to perform a continuous moving irradiation on the solar cell substrate (110), and performing a laser-assisted sintering treatment on the first initial electrode (e1) to form a first electrode (E1) and obtain the solar cell (100). The number of times the laser (L) is controlled to perform the continuous moving irradiation on the solar cell substrate (110) is at least once. There is a target irradiation process among all continuous moving irradiation processes, in which a moving direction (M) of the laser (L) and a longitudinal extension direction (F₃) of the first electrode (E1) intersect with each other and are perpendicular to a thickness direction (F₁) of the solar cell substrate (110).

Disclosed are a solar cell (300), a method for manufacturing the same, and a photovoltaic module. The solar cell (300) includes: a substrate (100) having a front side (101) and a back side (102) opposite to each other, a first doped layer (110) and a second doped layer (120) alternately arranged along a first direction (X) on the back side (101), and a first electrode (130) and a second electrode (140). The first doped layer (110) and the second doped layer (120) adjacent to the first doped layer (110) are separated by an isolation region (103). A portion of the back side (102) located at the isolation region (103) is exposed. The first doped layer (110) has a first slope sidewall (111) facing the isolation region (103), and the second doped layer (120) has a second slope sidewall (121) facing the isolation region (103).

Provided is a photovoltaic module, including a first intermediate busbar having a first lead-out terminal provided at an end thereof; a second intermediate busbar having a second lead-out terminal provided at an end thereof; and a first jumper wire arranged on a first isolation bar; the first lead-out terminal and the second lead-out terminal are located on two opposite sides of the first jumper wire, and the first lead-out terminal and the second lead-out terminal abut against two opposite side surfaces of the first isolation bar or overlap a top surface of the first isolation bar. Compared with the related art, the first isolation bar where the first jumper wire is located is clamped or pressed by the first lead-out terminal and the second lead-out terminal, to prevent short circuit or shielding of the cell caused by free movement of the first jumper wire, the first and second intermediate busbars.

The present disclosure provides a back-contact photovoltaic module and a manufacturing method thereof. The back-contact photovoltaic module includes a glass substrate, an upper adhesive film layer, a solar cell layer, a lower adhesive film layer, and a back sheet arranged in sequence from top to bottom. The solar cell layer includes back-contact solar cells, and a front surface of each of the back-contact solar cells is provided with a transparent support layer. The transparent support layer protrudes from a surface of the back-contact solar cell, and the transparent support layer covers a partial region of the front surface. According to the present disclosure, the front surface of the back-contact solar cell can be protected, and a risk of scratches to the back-contact photovoltaic module can be reduced.

Provided are a solar cell and a photovoltaic module. The solar cell includes a substrate, a passivation contact structure, a passivation layer, and at least one first electrode. The substrate has a first side and a second side opposite to the first side, where the first side includes metallization pattern regions and non-metallization pattern regions disposed alternatingly along a first direction, and the second side has a greater roughness than the metallization pattern regions. The passivation contact structure covers the metallization pattern regions and includes a first tunneling dielectric layer and a first doped conductive layer. The passivation layer is formed over the non-metallization pattern regions and the first doped conductive layer. A respective first electrode includes a respective connecting electrode over a respective metallization pattern region and a plurality of spot electrodes disposed at intervals along a second direction. The plurality of spot electrodes are disposed below the respective connecting electrode and connected to the respective connecting electrode, the plurality of spot electrodes penetrate the passivation layer to be in electrical contact with the first doped conductive layer, and the respective connecting electrode includes at least one material that is different from a material included in the plurality of spot electrodes.

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A photovoltaic module is provided, including: a laminate (1) comprising a cell layer (13); an insulating member (3) arranged at an edge of the laminate (1) and in contact with the laminate (1) along a peripheral direction of the laminate (1); and a border frame (2), with the edge of the laminate (1) being positioned within the border frame (2) and with the insulating member (3) being positioned between the edge of the laminate (1) and the border frame (2).

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