An optoelectronic device is disclosed. The optoelectronic device comprises a semiconductor structure; a plurality of contacts on the front side of the semiconductor structure; and a plurality of non-continuous metal contacts on a back side of the semiconductor structure. In an embodiment, a plurality of non-continuous back contacts on an optoelectronic device improve the reflectivity and reduce the losses associated with the back surface of the device.

Chemical polishing of solar cell surfaces and the resulting structures are described herein. In an example, a method of fabricating a solar cell includes texturizing both first side and second side surfaces of a silicon substrate with a first hydroxide-based etch process. The method also includes reducing a surface roughness factor of the texturized second side surface of the silicon substrate with a second hydroxide-based etch process. The method also includes, subsequent to reducing the surface roughness factor of the texturized second side surface of the silicon substrate, forming emitter regions on the second side surface of the silicon substrate.

A photovoltaic device and method include a doped germanium-containing substrate, an emitter contact coupled to the substrate on a first side and a back contact coupled to the substrate on a side opposite the first side. The emitter includes at least one doped layer of an opposite conductivity type as that of the substrate and the back contact includes at least one doped layer of the same conductivity type as that of the substrate. The at least one doped layer of the emitter contact or the at least one doped layer of the back contact is in direct contact with the substrate, and the at least one doped layer of the emitter contact or the back contact includes an n-type material having an electron affinity smaller than that of the substrate, or a p-type material having a hole affinity larger than that of the substrate.

The present disclosure provides a processing method for a photovoltaic cell and a string welding and curing device for a photovoltaic cell. The method includes step S1: plating both side surfaces of a monocrystalline silicon wafer; Step S2: forming a first electrode on one side surface of the plated monocrystalline silicon wafer; Step S3: forming a second electrode on the other side surface of the plated monocrystalline silicon wafer, to form a cell sheet; and Step S4: string welding a plurality of cell sheets and at the same time, curing the first electrode and the second electrode, by using a string welding and curing device for a photovoltaic cell. With the processing method provided by the present disclosure, the electrodes on the cell sheets can be cured while the cell sheets are string welded. It can save resources, shorten the processing time of the photovoltaic cell, and improve the production efficiency.

The present disclosure relates to a solar cell photovoltaic module and a solar cell photovoltaic assembly. The solar cell photovoltaic module comprises a plurality of matrix-arranged cells, a plurality of main grids and fine grids are distributed on the light receiving surface of the cells, the main grids collect currents on the fine grids connected thereto, the currents collected by the main grids are transmitted through interconnects that connect to the main grids, and the cells are rectangular. The solar cell photovoltaic assembly comprises modules and bus bars, wherein two adjacent modules are connected via a diode or via a virtual conductive wire plus a diode, and the bus bars and the conductive wire are connected with an output via a junction box.

Systems and methods for structures that support bifacial photovoltaic panels are presented. A system comprising a support structure mounted to an underside of bifacial photovoltaic panels arranged in a row is provided herein. The support structure comprises one or more elongated structural members extending along and in a direction parallel to the row. The support structure further comprises one or more pivot arms that rotate about an axle at a top of the support structure. The one or more pivot arms are positioned in a perpendicular direction to the one or more elongated structural members. The one or more pivot arms connected to the one or more elongated structural members. The one or more structural elements of the support structure have a reflective outer surface to increase reflected light to the underside of the bifacial photovoltaic panels.

Solar cell and method of manufacturing a solar cell. The solar cell has a silicon substrate (2) and a layer (4) disposed on a substrate side (2a) of the silicon substrate (2). It further has a contact structure (6) extending through the layer (4) from a cell side (1a) of the solar cell (1) to the silicon substrate (2). The layer (4) is composed of a polycrystalline silicon layer (8) and a tunnel oxide layer (10) interposed between the polycrystalline silicon layer (8) and the silicon substrate (2).

The present invention discloses a bi-facial photovoltaic power generation module, comprising a transparent box, and a cell string and a mounting base which are installed inside the transparent box, wherein the transparent box is provided with a positive terminal and a negative terminal, the cell string is formed by connecting several bi-facial cells in series or in parallel with both ends of the cell string respectively provided with a positive wire and a negative wire welded on the positive terminal and the negative terminal, and the mounting base is provided with strip-shaped slots in which the bi-facial cells can be plugged. According to the present invention, the module can simultaneously generate power on front and back sides thereof and improve its power generation efficiency per unit area.

A beam includes a flat plate and an elliptical curved plate, each of both ends of the flat plate are respectively fixedly connected to a corresponding end of the elliptical curved plate to form a ring shape, and a plane where the flat plate is located is perpendicular to a long axis of an ellipse where the elliptical curved plate is located. Also provided is the use of the beam in a solar tracking bracket that includes the beam; a post; and a bearing seat comprising a bearing ring, a Z-shaped support plate and a bottom plate connected sequentially. The Z-shaped support plate has a Z-shaped cross section, the beam is installed inside the bearing ring, the flat plate of the beam faces a solar module, and the bottom plate is connected to the post. The beam of the present invention improves the resistance moment of the lateral cross section and saves costs, and when applied to the solar tracking bracket, the beam can slow down the hot spot effect of the bifacial solar module and prolong the service life of the same.

A photovoltaic device and method include a doped germanium-containing substrate, an emitter contact coupled to the substrate on a first side and a back contact coupled to the substrate on a side opposite the first side. The emitter includes at least one doped layer of an opposite conductivity type as that of the substrate and the back contact includes at least one doped layer of the same conductivity type as that of the substrate. The at least one doped layer of the emitter contact or the at least one doped layer of the back contact is in direct contact with the substrate, and the at least one doped layer of the emitter contact or the back contact includes an n-type material having an electron affinity smaller than that of the substrate, or a p-type material having a hole affinity larger than that of the substrate.