Silicon plate and solar cell
AssigneeSharp Kabushiki Kaisha
InventorYoshihiro Tsukuda
Life of this patent
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Abstract
A polycrystalline silicon plate has grain boundary lines on a surface thereof, and at least one of the grain boundary lines is a quasi-linear grain boundary line. The silicon plate is used to produce a solar cell. The silicon plate is formed using a base substrate having an irregular surface provided with dotted or linear protrusions, which makes it possible to control the grain boundary lines. As such, an inexpensive and high-quality silicon plate can be provided. Further, by employing this silicon plate to produce a solar cell, an inexpensive and high-quality solar cell can be provided as well.
Claims8
A solar cell produced by using a polycrystalline silicon plate that is formed by solidifying molten silicon on a base substrate at a temperature of not higher than a silicon melting point, the base substrate having a surface provided with protrusions and concaves, wherein quasi-linear grain boundary lines forming a grid each extend from one side to an opposite side in a surface of the silicon plate.
A solar cell produced by using a polycrystalline silicon plate that is formed by solidifying molten silicon on a base substrate at a temperature of not higher than a silicon melting point, comprising:
- the base substrate having a surface provided with protrusions and concaves, wherein quasi-linear grain boundary lines forming a grid each extend from one side to an opposite side in a surface of the silicon plate.
Dependencies are inferred from the claim text.