Solar cell, tandem solar cell, and photovoltaic module

Patent metadata

Field	Value
Publication number	US-12514025-B2
Application number	US-202418646474-A
Country	US
Kind code	B2
Filing date	Apr 25, 2024
Priority date	Feb 6, 2024
Publication date	Dec 30, 2025
Grant date	Dec 30, 2025

Abstract

Provided are a solar cell, a method for preparing a solar cell, a tandem solar cell, and a photovoltaic module. The solar cell includes a substrate, a doped conductive layer, and a dielectric layer. The substrate has a first surface, where the first surface includes electrode regions and non-electrode regions that are alternatingly arranged along a first direction. The doped conductive layer is formed over the first surface of the substrate. The doped conductive layer includes first conductive portions and at least one second conductive portion. Each respective first conductive portion of the first conductive portions is formed over a respective electrode region of the electrode regions, and each respective second conductive portion of the at least one second conductive portion is formed over a part of a non-electrode region of the non-electrode regions. The dielectric layer is between the first surface and the doped conductive layer.

First claim

What is claimed is:

1 . A solar cell, comprising:
a substrate having a first surface, wherein the first surface includes electrode regions and non-electrode regions that are alternatingly arranged along a first direction; a doped conductive layer formed over the first surface of the substrate, the doped conductive layer including first conductive portions and at least one second conductive portion, each respective first conductive portion of the first conductive portions being formed over a respective electrode region of the electrode regions and each respective second conductive portion of the at least one second conductive portion being formed over a part of a non-electrode region of the non-electrode regions; and a dielectric layer between the first surface and the doped conductive layer; wherein the first surface includes a first part aligned with the doped conductive layer and a second part not aligned with the doped conductive layer, the first part includes a plurality of platform structures, and the second part includes a plurality of first pyramid structures; wherein the first conductive portions are arranged at intervals along the first direction and extend along a second direction intersecting the first direction, the first conductive portions including two first conductive portions respectively formed over two corresponding electrode regions adjacent to the non-electrode region, and each of the two first conductive portions is in contact connection with the respective second conductive portion; wherein the respective second conductive portion includes a plurality of first strip-shaped structures arranged at intervals along the second direction, and each of the plurality of first strip-shaped structures extends along the first direction and is in contact connection with the two first conductive portions; wherein the respective second conductive portion includes a plurality of second strip-shaped structures extending along the second direction, arranged at intervals along the first direction and intersecting the plurality of first strip-shaped structures to form a grid structure; and wherein the grid structure has a plurality of mesh holes defined by the plurality of first strip-shaped structures and the plurality of second strip-shaped structures, and each of the plurality of mesh holes has a first dimension of less than or equal to 100 μm in the first direction, and a second dimension of 5 μm to 200 μm in the second direction.

2 . The solar cell of claim 1 , wherein the at least one second conductive portion is disposed over only a partial number of the non-electrode regions.

3 . The solar cell of claim 1 , wherein the at least one second conductive portion is in one-to-one correspondence with the non-electrode regions.

4 . The solar cell of claim 1 , wherein a respective first strip-shaped structure of the plurality of first strip-shaped structures has a first width, a respective second strip-shaped structure of the plurality of second strip-shaped structures has a second width, and a respective first conductive portion of the first conductive portions has a third width, wherein the third width is greater than each of the first width and the second width.

5 . The solar cell of claim 1 , wherein an orthographic projection area of the at least one second conductive portion on a projection plane is 5% to 30% of an orthographic projection area of the first surface on the projection plane, the projection plane being a plane perpendicular to a direction directed from the dielectric layer to the doped conductive layer.

6 . The solar cell of claim 1 , wherein the substrate further has a second surface opposite to the first surface, the second surface includes a plurality of second pyramid structures.

7 . The solar cell of claim 6 , wherein a bottom of a respective first pyramid structure of the plurality of first pyramid structures has a one-dimensional size smaller than a one-dimensional size of a bottom of a respective second pyramid structure of the plurality of second pyramid structures.

8 . A tandem solar cell, comprising:
a bottom cell, wherein the bottom cell includes:
a substrate having a first surface, wherein the first surface includes electrode regions and non-electrode regions that are alternatingly arranged along a first direction;
a doped conductive layer formed over the first surface of the substrate, the doped conductive layer including first conductive portions and at least one second conductive portion, each respective first conductive portion of the first conductive portions being formed over a respective electrode region of the electrode regions and each respective second conductive portion of the at least one second conductive portion being formed over a part of a non-electrode region of the non-electrode regions, wherein the remaining part of the non-electrode region is not covered by the doped conductive layer; and
a dielectric layer between the first surface and the doped conductive layer; and
a top cell, located on a side of the doped conductive layer in the bottom cell away from the substrate; wherein the first surface includes a first part aligned with the doped conductive layer and a second part not aligned with the doped conductive layer, the first part includes a plurality of platform structures, and the second part includes a plurality of first pyramid structures; wherein the first conductive portions are arranged at intervals along the first direction and extend along a second direction intersecting the first direction, the first conductive portions including two first conductive portions respectively formed over two corresponding electrode regions adjacent to the non-electrode region, and each of the two first conductive portions is in contact connection with the respective second conductive portion; wherein the respective second conductive portion includes a plurality of first strip-shaped structures arranged at intervals along the second direction, and each of the plurality of first strip-shaped structures extends along the first direction and is in contact connection with the two first conductive portions; wherein the respective second conductive portion includes a plurality of second strip-shaped structures extending along the second direction, arranged at intervals along the first direction and intersecting the plurality of first strip-shaped structures to form a grid structure; and wherein the grid structure has a plurality of mesh holes defined by the plurality of first strip-shaped structures and the plurality of second strip-shaped structures, and each of the plurality of mesh holes has a first dimension of less than or equal to 100 μm in the first direction, and a second dimension of 5 μm to 200 μm in the second direction.

9 . The tandem solar cell of claim 8 , wherein the at least one second conductive portion is disposed over only a partial number of the non-electrode regions.

10 . The tandem solar cell of claim 8 , wherein the at least one second conductive portion is in one-to-one correspondence with the non-electrode regions.

11 . A photovoltaic module, comprising:
at least one cell string, each formed by connecting the solar cells of claim 1 ; at least one encapsulating film, each configured to cover a surface of a respective cell string; and at least one cover plate, each configured to cover a surface of a respective encapsulating film facing away from the respective cell string.

12 . A photovoltaic module, comprising:
at least one cell string, each formed by connecting the tandem solar cells of claim 8 ; at least one encapsulating film, each configured to cover a surface of a respect

Assignees

• Zhejiang Jinko Solar Co Ltd

Inventors

• Liao Guangming
• Wang Yulin
• Zhang Han
• Wang Hao
• Li Wen
• Jin Jingsheng
• Zhang Bike
• Zhang Xinyu

Classifications

• H10F19/807

  Double-glass encapsulation, e.g. photovoltaic cells arranged between front and rear glass sheets · CPC title

• H10F19/50

  Integrated devices comprising at least one photovoltaic cell and other types of semiconductor or solid-state components (H10F19/75 takes precedence) · CPC title

• H10F77/219

  Arrangements for electrodes of back-contact photovoltaic cells · CPC title

• H10F77/703

  of the semiconductor bodies, e.g. textured active layers · CPC title

• H10F10/14

  Photovoltaic cells having only PN homojunction potential barriers · CPC title