Provided are a back contact solar cell, a method for preparing a back contact solar cell, and a battery assembly. The back contact solar cell includes: a semiconductor substrate having a light receiving surface and a shady surface opposite to the light receiving surface, a first polarity structure formed in the first polarity region, and a second polarity structure formed in the second polarity region. The light receiving surface is a textured surface, and a surface of the first polarity region and a surface of the second polarity region are polished surfaces. According to the back contact solar cell of the present disclosure, a shady surface of the semiconductor substrate is combined with a passivation contact technology to form a hybrid back contact cell. Meanwhile, the shady surface of the semiconductor substrate is processed as a polished surface.

A metal-semiconductor contact structure and a preparation method thereof, a solar cell and a photovoltaic module are provided. The metal-semiconductor contact structure includes a metal electrode and a semiconductor layer in contact with each other. The metal electrode has a metal element, and the semiconductor layer has a semiconductor element and a doping element for doping the semiconductor layer. A contact interface between the metal electrode and the semiconductor layer has a hole and a conductive structure. The conductive structure includes a conductive eutectic adjacent to the semiconductor layer, and a conductive crystal extending from the conductive eutectic into the hole. The conductive eutectic includes a eutectic formed by the metal element and the semiconductor element, and the conductive crystal includes a crystal formed by crystallization of the metal element.

This application provides a solar cell, a preparation method therefor, and a photovoltaic module. In one aspect, a solar cell includes a silicon substrate, and a low-absorption coefficient layer arranged on a light-receiving surface of the silicon substrate. The low-absorption coefficient layer and the light-receiving surface of the silicon substrate have a same conductivity type. An absorption coefficient of the low-absorption coefficient layer is less than an absorption coefficient of the silicon substrate in a wavelength band of less than or equal to 400 nm. A thickness of the low-absorption coefficient layer ranges from 15 to 200 nm. The low-absorption coefficient layer is in contact with the silicon substrate.

A solar cell, a preparation method thereof, a photovoltaic module, and a photovoltaic system, wherein the solar cell includes a substrate and a first tunnel oxide layer and a passivation medium layer sequentially stacked on a first surface of the substrate. The first tunnel oxide layer is at least partially in contact with the first surface. The passivation medium layer includes at least a transparent conductive oxide layer.

A manufacturing method for a solar cell includes the following steps. The manufacturing method includes providing a solar cell semi-finished product. The manufacturing method includes performing a laser opening process to form openings. The manufacturing method includes forming a conductive paste in the openings. The manufacturing method includes performing a firing process. The manufacturing method includes performing a laser-enhanced contact optimization process. The openings expose the semiconductor doping layer of the solar cell semi-finished product. The conductive paste includes 80 to 120 parts by weight of core-shell particles, 0.1 to 14 parts by weight of glass frit, 5 to 25 parts by weight of adhesive resin, and 5 to 30 parts by weight of solvent. Each of the core-shell particles includes a core and a shell layer, and the core includes copper.

Photovoltaic devices, and methods of fabricating photovoltaic devices. The photovoltaic devices may include a first electrode, at least one quantum dot layer, at least one semiconductor layer, and a second electrode. The first electrode may include a layer including Cr and one or more silver contacts.

Illustrative embodiments of the invention generally relate to photovoltaics and solar energy harvesting devices and, particularly, to those that are transparent or semi-transparent, allowing sufficient visible light through them to allow visualization of objects through them, and more particularly, to those that supplement their primary near ultraviolet light absorption with secondary and/or tertiary absorptions of narrow bands of visible light while maintaining their transparency. Various embodiments of the invention relate to single solar materials with both primary ultraviolet absorption and secondary, narrow-band visible absorption, while some embodiments of the invention utilize mixtures of one or more materials to realize a primary ultraviolet absorption of light with secondary, or even tertiary, narrow bands of visible light absorption. Means of manufacturing such photovoltaics and solar energy harvesting devices will also be disclosed as well as the applications and uses thereof.

Photovoltaic devices, and methods of fabricating photovoltaic devices. The photovoltaic devices may include a first electrode, at least one quantum dot layer, at least one semiconductor layer, and a second electrode. The first electrode may include a layer including Cr and one or more silver contacts.

A photovoltaic device includes a plurality of photovoltaic cells coupled in series, the photovoltaic cells including a first contact layer disposed over a first substrate, a first charge transport layer (CTL) disposed over the first contact layer, an absorber layer disposed over the first CTL, a second CTL disposed over the absorber layer, and an ultraviolet (UV) blocking layer comprising a first layer formed on a first side of the first substrate and a second layer formed over the first layer, wherein a refractive index (RI) between the first layer and the first substrate is less than or equal to 1.3, and an RI between the second layer and the first layer is from about 0.75 and about 1.5

A solar cell, a preparation method thereof, a photovoltaic module, and a photovoltaic system, wherein the solar cell includes a substrate and a first tunnel oxide layer and a passivation medium layer sequentially stacked on a first surface of the substrate. The first tunnel oxide layer is at least partially in contact with the first surface. The passivation medium layer includes at least a transparent conductive oxide layer.