Provided are 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 first conductive portion is formed over a respective electrode region of the electrode regions, and each respective 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.

A solar cell and a photovoltaic module are provided. The solar cell includes a substrate provided with a first face and a second face, at least one of which is a side of the substrate. On shared prismatic edges and/or shared corners where the first surface and the second surface are adjacent, the substrate is also provided with a multiple-pyramid shared body having a shared face. When viewed in the direction towards the first surface, the multiple-pyramid shared body includes a first pyramid structure formed by enclosing several first triangular surfaces and several third triangular surfaces. When viewed in the direction towards the second surface, the multiple-pyramid shared body includes a second pyramid structure formed by enclosing several second triangular surfaces and several third triangular surfaces.

The present invention discloses a back contact solar cell. The back contact solar cell includes a semiconductor substrate having a front surface and a rear surface; a first conductive type semiconductor region having a first conductive type and a second conductive type semiconductor region having a second conductive type at an interval on the rear surface of the semiconductor substrate. Furthermore, the rear surface of the semiconductor substrate has a texturing structure at the interval between the first conductive type semiconductor region and the second conductive type semiconductor region.

The present invention discloses a back contact solar cell. The back contact solar cell includes a semiconductor substrate having a front surface and a rear surface; a first conductive type semiconductor region having a first conductive type and a second conductive type semiconductor region having a second conductive type at an interval on the rear surface of the semiconductor substrate. Furthermore, the rear surface of the semiconductor substrate has a texturing structure at the interval between the first conductive type semiconductor region and the second conductive type semiconductor region.

The present invention relates to the field of solar cell technologies, and discloses a TBC solar cell, a backside structure of TBC solar cell, and preparing methods for TBC solar cell and its backside structure. A high-concentration doped region and a low-concentration doped region are disposed in a first doped polysilicon layer included in the backside structure of a TBC solar cell provided in the present invention, which ensures on the one hand that a metal electrode is in good contact with polysilicon, and on the other hand that the cell has low contact resistance, so that the conversion efficiency of the cell is high. TBC solar cellTBC solar cell

The present disclosure provides a solar cell and a photovoltaic module, and relates to the field of solar cell technologies. In an implementation, the solar cell includes a semiconductor substrate, a tunnel oxide layer located on at least one surface of the semiconductor substrate, and a doped polysilicon layer located on a surface of the tunnel oxide layer away from the semiconductor substrate. At least part of a surface of the doped polysilicon layer away from the tunnel oxide layer is provided with silicon-containing protrusion particles. The photovoltaic module provided in the present application includes the solar cell.

A method for preparing a solar cell includes: providing an n-type semiconductor substrate, the semiconductor substrate including a first surface and a second surface opposite to each other, the second surface including a passivation contact region and a passivation region adjacent to each other; forming a first tunneling passivation structure on the first surface; forming a second tunnel material layer and a second passivation contact material layer stacked on the second surface; oxidizing a surface of the second passivation contact material layer located in the passivation contact region to form a mask layer; and processing the second passivation contact material layer located in the passivation region through the mask layer to form a second tunneling passivation structure located in the passivation contact region.

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.

Disclosed are a semiconductor substrate and a treating method thereof, a solar cell and a preparation method thereof. The method for treating a semiconductor substrate includes forming a smooth surface area and a textured surface area adjacent to the smooth surface area on at least one side of the semiconductor substrate. The area of the smooth surface area is greater than or equal to that of the textured surface area. A smooth surface area and a textured surface area adjacent to the smooth surface area are formed on at least one side of the semiconductor substrate, so that the transparent conductive film is located and only located on the smooth surface area. A grid line is formed on the side of the corresponding to the transparent conductive film facing away from the semiconductor substrate, thereby improving the photovoltaic conversion efficiency of the solar cell.

This disclosure provides a back contact solar cell and a method for manufacturing a back contact solar cell. In one example, a back contact solar cell includes a silicon substrate having first regions and second regions alternately distributed on a back surface of the silicon substrate, and a first doped semiconductor layer formed on a first region on the back surface of the silicon substrate. A groove structure concaving inward the silicon substrate relative to a surface of the first region is formed on a second region. An end portion of the first doped semiconductor layer adjacent to the second region is arranged in a suspended manner.