| 摘要 |
An apparatus for converting sunlight to electricity comprises a sheet of soda lime glass having a softening point not exceeding 600° C. and a layer of crystalline silicon over said sheet of soda lime glass. The layer has a thickness not less than about 5 microns and grains with grain size not less than about 100 microns. A method for making a device for converting sunlight to electricity comprises forming a film on a soda lime glass substrate, dispersing silicon powder onto the film and pressing a surface onto the silicon powder to form a layer of silicon powder on said film. The substrate and film are heated from below to a temperature so that the soda lime glass substrate softens. While the substrate is in a softened state, the silicon powder layer is heated by scanning a line focus laser beam or an elongated heater strip over a spatial sequence of adjacent elongated zones of the silicon powder consecutively so that the silicon powder in each of the zones melts and recrystallizes consecutively to form a layer of crystalline silicon with a thickness in the range of 5 to 100 micron over said film. Preferably the laser beam or heater strip scans and heats a triangular area of the layer of silicon powder, where the area has an apex leading said scan area during scanning.
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