Abstract: A device for improving ohmic contact between a front contact and a doped layer of a wafer solar cell having a front, a back, the front contact, the doped layer and a back contact. The front and back contacts are strip-shaped or grid-shaped. The device having: two contacting apparatuses for electrically contacting the front and back contacts; a voltage source having a pole for electrical connection to one contacting apparatus and a pole for connection to the other contacting apparatus; and two point light sources to illuminate the front and the back.

Abstract: A method for improving the ohmic contact between a front contact grid and a doped layer of a wafer solar cell, including: providing the wafer solar cell; electrically contacting the front contact grid with a contacting device electrically connected to a pole of a voltage source; electrically contacting another contacting device electrically connected to the other pole of the voltage source with a back contact grid of the cell; applying a voltage directed against the forward direction of the cell to the front contact grid and the back contact grid with the voltage source, wherein the voltage is smaller than a breakdown voltage of cell; guiding a point light source over the sun-averted back side of the cell while the voltage is applied, wherein a partial region of the sun-averted back side is illuminated such that a current flow is induced in, and acts on, the partial region.

Abstract: A device for improving the ohmic contact between a front side contact and a doped layer of a wafer solar cell that includes a front side, a rear side and a rear side contact. The front side and/or the rear side contact are strips or grids. The device includes: a contacting unit for contacting the front or rear side contact; a further contacting unit for contacting the other contact; a voltage source having one pole for connection to the contact unit and another pole for connection to the further contacting unit; and a point light source to illuminate the front or rear side. The further contacting unit includes: an optically transparent material, coated using an optically transparent, electrically conductive layer; or an optically transparent material having microscopically-thin wires; or an optically transparent, electrically conductive material having microscopically-thin wires; or a mesh or a network made up of microscopically-thin wires.

Abstract: A method for improving contact resistance of a multi-junction solar cell having a front and a back and multiple subcells, including: a) delivering the solar cell with front and back contacts in grid, strip or transparent form; b) contact-connecting one region of the back contact to a contact device connected to one pole of a voltage source, and the front contact or another region of the back contact, which is electrically insulated from the region, to another contact device, which is connected to the other pole of the voltage source; c) applying a voltage against the forward direction of the solar cell to the contacts, the voltage smaller than a solar cell breakdown voltage; d) guiding a point light source over the solar cell, a subregion of the front or back being illuminated, inducing current in the subregion, and illuminating the subregion with light beams of different wavelengths.

Abstract: The invention relates to a method for improving the ohmic-contact behaviour between a contact grid and an emitter layer of a silicon solar cell, in which, in a treatment step, a treatment current flow having a current density of 200 A/cm2 to 20,000 A/cm2 in relation to the treatment section is induced while biasing and illuminating the silicon solar cell. The object of the invention is to improve the method for improving the ohmic-contact behaviour between a contact grid and an emitter layer of a silicon solar cell. In particular, it should be possible to quantify the improvement achieved by the method while implementing the method. Furthermore, any damage resulting from the application of unfavourable process parameters should be detected while the method is being implemented.

Abstract: Method for manufacturing an solar cell device, characterized in that the method comprises among others the following steps: arranging solar cell units (1) and electrically insulating units (2) alternatingly next to each other; applying rear soldering ribbons (3) to the rear side of the solar cell units (1) and the electrically insulating units (2); applying front soldering ribbons (4) to the front side of the solar cell units (1) and the electrically insulating units (2); soldering the rear soldering ribbons (3) and the front soldering ribbons (4) to the solar cell units (1), thereby providing an assembled solar cell. The invention also comprises a solar cell manufactured by means of the method.

Abstract: The present invention relates to photovoltaic modules with a plurality of separated photovoltaic elements (3). There is provided a product which utilizes the incident light in the areas in between the elements and a method for production thereof. The area in between the elements is covered by a liquid polymer (2) which is formed into V-grooves and cured and may be covered by a reflective layer.

Abstract: A solar cell module comprises a light receiving structure with a substantially transparent front cover and a plurality of active elements placed behind the said front cover. At least one interconnector is situated between adjacent active elements, the interconnectors having a reflective structure facing towards said front cover.