In one aspect, a manufacturing method for a solar cell comprises: an oxidation impurity removal and cleaning step carried out between a wet texturing step and a boron/phosphorus diffusion step. The oxidation impurity removal and cleaning step comprises: heating a silicon wafer undergoing wet texturing performed by means of basket loading, so as to form first oxide layers to adsorb impurities of the silicon wafer; and removing the first oxide layers on the front surface and the back surface of the silicon wafer.

A solar cell is disclosed. The solar cell includes a crystalline semiconductor substrate containing impurities of a first conductivity type, a front doped layer located on a front surface of the semiconductor substrate, a back doped layer located on a back surface of the semiconductor substrate, a front transparent conductive layer located on the front doped layer and having a first thickness, a front collector electrode located on the front transparent conductive layer, a back transparent conductive layer located under the back doped layer and having a second thickness, and a back collector electrode located under the back transparent conductive layer. The first thickness of the front transparent conductive layer and the second thickness of the back transparent conductive layer are different from each other, and a sheet resistance of the front transparent conductive layer is less than a sheet resistance of the back transparent conductive layer.

The present invention concerns methods for producing photovoltaic material and a device able to exploit high energy photons. The photovoltaic material is obtained from a conventional photovoltaic material having a top surface intended to be exposed to photonic radiation, having a built-in P-N junction delimiting an emitter part and a base part and comprising at least one area or region specifically designed, treated or adapted to absorb high energy or energetic photons, located adjacent or near at least one hetero-interface. According to the invention, this material is subjected to treatments resulting in the formation of at least one semiconductor based metamaterial field or region being created, as a transitional region of the or a hetero-interface, in an area located continuous or proximate to the or an absorption area or region for the energetic photons of the photonic radiation impacting said photovoltaic material.

Automatic assembly method of a photovoltaic panel with cells of the back-contact type provided with a conductive backsheet with a thermoplastic encapsulating layer; the loading of the cells occurs in combination with their pre-fixing in a combined station sequentially placed before the superimposition of the upper encapsulating layer and after the laying of the conductive adhesive. The loading is carried out with a first device of the automatic mechanical hand type which takes a group of cells, aligns them with the back contacts in correspondence of the holes and lays them vertically from above. Furthermore, a second device of the presser-heater type carries out the pre-fixing of the cells holding them in the final position also with localized heating on at least one portion of each cell in such a way as to activate the adhesive function of the underlying thermoplastic encapsulating layer. A combined loading and pre-fixing station is also disclosed.

A photovoltaic device is provided that includes a semiconductor substrate including a p-n junction with a p-type semiconductor portion and an n-type semiconductor portion one lying on top of the other, wherein an upper exposed surface of the semiconductor substrate represents a front side surface of the semiconductor substrate. A plurality of patterned antireflective coatings is located on the front side surface to provide a grid pattern including a busbar region and finger regions. The busbar region includes at least a real line interposed between at least two dummy lines. A material stack including at least one metal layer located on the semiconductor substrate in the busbar region and the finger regions.

The disclosure relates to solar cell, and especially to a method for manufacturing a crystalline silicon solar cell module. The method includes: a) providing a solar cell module to be laminated, including a back plate, a first bonding layer, a crystalline silicon solar cell component, a second bonding layer and a top plate in contact in sequence, where the crystalline silicon solar cell component is a crystalline silicon solar cell or a cell string formed by connecting multiple crystalline silicon solar cells; b) laminating the solar cell module to be laminated under current injection, to obtain a laminated solar cell module; and c) installing a frame and a junction box on the laminated solar cell module, to obtain a crystalline silicon solar cell module. The crystalline silicon solar cell module is under the current injection during the laminating process, improving the performance against light-induced degradation.

The invention relates to a passivated emitter rear solar cell, comprising a silicon substrate having a front and back surface, a rear passivation layer on the back surface of the silicon substrate having a plurality of open holes formed therein, an aluminum back contact layer formed in the open holes of the rear passivation layer, and at least one backside soldering tab on the back surface of the silicon substrate. The backside soldering tab is formed from an electroconductive paste composition comprising conductive metallic particles, at least one lead-free glass frit, and an organic vehicle comprising at least one silicone oil.

A method of forming an electrode, an electrode for a solar cell manufactured, and a solar cell, the method including forming a pattern of a finger electrode by: coating a composition for forming a first electrode that includes a conductive powder, an organic vehicle, and a first glass frit that is free of silver and phosphorus, and drying the coated composition for forming a first electrode; forming a pattern of a bus electrode by: coating a composition for forming a second electrode that includes a conductive powder, an organic vehicle, and a second glass fit that includes silver and phosphorus, and drying the coated composition for forming a second electrode; and firing the resultant patterns.

A photovoltaic module includes a plurality of photovoltaic cells and a controllable heater for heating the plurality of photovoltaic cells to a temperature of at least 90 degrees Celsius for a minimum of 10 minutes, the plurality of photovoltaic cells in a manufactured state such that the plurality of photovoltaic cells are capable of producing electricity when illuminated. In one embodiment, controllable heater includes an infrared absorber, where the infrared absorber is adapted for moving between a stored position and a deployed position, and where the infrared absorber is adapted for heating the photovoltaic module using absorbed infrared radiation when in the deployed position.

An apparatus for restoring efficiency of a photovoltaic cell includes an illumination module for illuminating one or more photovoltaic cells such that the one or more photovoltaic cells receive a time integrated irradiance equivalent to at least 5 hours of solar illumination. The apparatus includes an annealing module for annealing the one or more photovoltaic cells at a temperature above 90 degrees Celsius for a minimum of 10 minutes, the annealing in response to illuminating the one or more photovoltaic cells.