Universität Konstanz Patent applications |
Patent application number | Title | Published |
20130153025 | METHOD FOR PRODUCING A SOLAR CELL HAVING A TEXTURED FRONT FACE AND CORRESPONDING SOLAR CELL - The invention relates to a method for producing a solar cell and to a solar cell which can be produced accordingly. On a solar cell substrate, first a ridged texture, which may for example comprise pyramids produced by alkaline etching, is formed both on a front face and on a rear face of the solar cell substrate. Then an etching barrier layer is applied to the front face of the solar cell substrate. Next the texture on the rear face of, the solar cell substrate is smoothed by etching in an isotropically acting etching solution which for example contains acid, wherein the front face is protected by the etching barrier layer. Thus, ridged structures on the rear face can be avoided and in this way reflection can be increased and surface passivation can be improved, both of which can lead to an increased potential efficiency. At the same time an emitter layer formed over the entire surface of the solar cell substrate on the rear face can be removed during etching, so that electrical isolation of the front face contacts and the rear face contacts may be superfluous. | 06-20-2013 |
20130115239 | PROSTATE CANCER DNA VACCINE - The present invention concerns an (adjuvant) treatment or prevention option for the treatment and prevention of prostate cancer. In particular, it pertains to the provision of recombinant, optimized PAP genes which are useful as DNA vaccines for the above treatment or prevention. | 05-09-2013 |
20100218826 | METHOD FOR PRODUCING A SILICON SOLAR CELL WITH A BACK-ETCHED EMITTER AS WELL AS A CORRESPONDING SOLAR CELL - A method is presented for producing a silicon solar cell with a back-etched emitter preferably with a selective emitter and a corresponding solar cell. According to one aspect, the method comprises the following method steps: producing a two-dimensionally extending emitter at an emitter surface of a solar cell substrate; applying an etching barrier onto first partial zones of the emitter surface; etching the emitter surface in second partial zones of the emitter surface not covered by the etching barrier; removing the etching barrier; and producing metal contacts at the first partial zones. During the method, especially during the etching of the emitter surface in the second partial zones, a porous silicon layer is advantageously produced, which is then oxidised. This oxidised porous silicon layer can subsequently be etched away together with any phosphorus glass that may be present. The method makes use of conventional screen-printing and etching technologies and is thus compatible with current industrial production plants. | 09-02-2010 |