Method of producing plate- or tape-shaped silicon crystal bodies having crystalline pillar-like structures therein, equivalent to _crystalline columnar structures, for large surface solar cells

US4330358A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Christa Grabmaier · Starnberg, DE
• Franz Otto · Munich, DE
• Helmut Thomann · Schwalbach am Taunus, DE

Key dates

• Filing date: Jun 17, 1980
• Grant date: May 18, 1982
• Expiry date: Jun 17, 2000

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C30B29/605
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Selectively shaped silicon crystal bodies, such as plate- or tape-shaped bodies, having crystalline pillar-like structures therein are produced by forming a slurry from an admixture of relatively fine sized silicon particles and a liquid binder, extruding such slurry as a relatively thin layer onto a first support member, drying such extruded layer until it becomes self-supporting and removing such support member, and then sintering such dried layer in a protective gas atmosphere at temperatures below about 1430.degree. C. until a layer of crystalline silicon particles are generated or grown having an average diameter substantially corresponding to the thickness of the dried slurry layer.