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 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 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 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: A method for producing a solar cell, including the following steps: a) providing a substrate having a front side and a back side in a deposition apparatus, and b) coating the substrate in situ with two layers, including b1) oxidizing, by exposing the substrate to an oxygen-containing gas and a first plasma, to create an oxide layer and b2) subsequently depositing a silicon layer or SiC layer by exposure to a gas containing silicon, an optional gas containing carbon and a second plasma, wherein step b) is carried out under vacuum in the deposition apparatus and the vacuum is maintained continuously during step b).

Abstract: A solar cell having a rear layer stack, wherein the rear layer stack has the following layer sequence: an AlOx layer, a first SiNx layer, a second SiNx layer, an SiOxNy layer, a third SiNx layer and at least one further layer, selected from the group consisting of SiOxNy, SiOx, AlOx, AINx and AlF. The invention further relates to a solar module comprising the solar cell, and a method of producing the solar cell, wherein the rear layer stack is deposited on a substrate in a tubular PECVD system with a boat as a substrate holder.

Abstract: The invention relates to a device (10) for treating goods (14) with the aid of an electric discharge in a receiving chamber (13) for the goods, which is defined by a wall (11, 11a, 11b, 12a, 12b, 12c, 12d, 12e) made of a dielectric material having at least two electrodes (16a, 16b) arranged on the outer side thereof (15). The invention is characterised in that at least one counter-electrode (21) is coupled in a capacitive manner to both of the outer electrodes on the inner side (20) of the wall (11).