| 摘要 |
The manufacturing method of the solar cell according to the present invention includes: 1) a first etching process in which an anisotropic etching is performed on an inner wall of each of a plurality of through holes, and 2) a second etching process in which an anisotropic etching is performed on a light-receiving surface. In the first etching process, a high concentration NaOH water solution (about 5% by weight) is used. Meanwhile, in the second etching process, a low concentration (about 1.5% by weight) NaOH water solution is used.
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