DEVICE AND METHOD FOR IMPROVING THE OHMIC CONTACT BETWEEN A FRONT CONTACT GRID AND A DOPED LAYER OF A WAFER SOLAR CELL

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. The contacting apparatuses each have: an optically-transparent material coated with an optically-transparent, electrically-conductive layer; an optically-transparent material having microscopically-thin, electrically-conductive wires integrated into a surface of the optically-transparent material; an optically-transparent, electrically-conductive material having microscopically-thin, electrically-conductive wires integrated into a surface of the optically-transparent, electrically-conductive material; or, a braid or a network of microscopically-thin, electrically-conductive wires.