Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V.

Heraeus Quarzglas Gmbh & Co Kg

Solarworld Innovations Gmbh

Kaspars Dadzis

Bernhard Freudenberg

Walter Lehmann

Christian Schenk

Gerrit Scheich

Andreas Krause

Marc Dietrich

Jochen Friedrich

Nils-Christian Nielsen

Gerd Fischer

Christian Reimann

Sara Grützner

Bianca Gründig-Wendrock

Sandra Nadolny

Doreen Nauert

Franziska Wolny

Matthias Trempa

A method for producing a solar crucible includes providing a crucible base body of transparent or opaque fused silica having an inner wall, providing a dispersion containing amorphous SiOparticles, applying a SiO-containing slip layer to at least a part of the inner wall by using the dispersion, drying the slip layer to form a SiO-containing grain layer and thermally densifying the SiO-containing grain layer to form a diffusion barrier layer. The dispersion contains a dispersion liquid and amorphous SiOparticles that form a coarse fraction and a fine fraction with SiOnanoparticles. The weight percentage of the SiOnanoparticles based on the solids content of the dispersion is in the range between 2 and 15% by weight. The SiO-containing grain layer is thermally densified into the diffusion barrier layer through the heating up of the silicon in the crystal growing process.

Silicon block, method for producing the same, crucible of transparent or opaque fused silica suited for performing the method, and method for the production thereof

Device for producing silicon blocks for photovoltaic applications, comprising a container for receiving a silicon melt with a base wall and at least one side wall, means for reducing the diffusion of impurities from at least one of the walls of the container into the silicon melt, wherein the means for reducing the diffusion of impurities comprise at least one covering element for the at least partial covering of at least one of the walls of the container.

Device and method for producing silicon blocks

Growing community of inventors

Freiberg, Germany

Kaspars Dadzis