Title:
SOLAR CELL
Document Type and Number:
WIPO Patent Application WO/2015/045809
Kind Code:
A1
Abstract:
Provided is a solar cell, the short-circuit current (Isc) of which can be improved by reflecting light that will otherwise pass through a crystal silicon substrate. The solar cell comprises: a crystal silicon substrate (10) of one conductivity type having a light receiving surface (11) and a back surface (12); a first silicon layer (20) of the other conductivity type provided on one of the light receiving surface (11) and the back surface (12); and a second silicon layer (30) of the one conductivity type provided on the other one of the light receiving surface (11) and the back surface (12). The light receiving surface (11) of the crystal silicon substrate (10) has a texture structure having an arithmetic average roughness (Ra) of 1000 nm or more, and the back surface (12) thereof has an uneven structure having an arithmetic average roughness (Ra) of less than 1000 nm.
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Inventors:
NAKAJIMA TAKAAKI
Application Number:
PCT/JP2014/073541
Publication Date:
April 02, 2015
Filing Date:
September 05, 2014
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01L31/0236; H01L31/0747
Foreign References:
| JP2004281758A | 2004-10-07 | |||
| JP2011061030A | 2011-03-24 |
Attorney, Agent or Firm:
MIYAZAKI & METSUGI (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
Patent business corporation Miyazaki and table-of-contents patent firm (JP)
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