Method for producing silicon solar cell, involves producing porous silicon layer at lower partial zones of emitter surface not covered by etching barrier

摘要

The method involves producing a two-dimensionally extending emitter (5) at an emitter surface of a solar cell substrate (21). A porous silicon layer (27) is produced at lower partial zones (9) of the emitter surface which is not covered by an etching barrier (25). The porous silicon layer is oxidized and back-etched. An independent claim is included for silicon solar cell.