Source: http://www.google.com/patents/US8129612?dq=5179747
Timestamp: 2014-11-24 08:39:13
Document Index: 776997597

Matched Legal Cases: ['Application No. 200710193656', 'Application No. 200410185123', 'Application No. 2007', 'Application No. 2006', 'Application No. 2007101851256', 'Application No. 200710185123', 'Application No. 200710185124', 'Application No. 07020916', 'Application No. 07020917', 'Application No. 07020918', 'Application No. 07022106', 'Application No. 2006', 'Application No. 2006', 'Application No. 2006', 'Application No. 2006']

Patent US8129612 - Method for manufacturing single-crystal silicon solar cell and single ... - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inAdvanced Patent SearchPatentsThere is disclosed a method for manufacturing a single-crystal silicon solar cell including the steps of: implanting a hydrogen ion or a rare gas ion into a single-crystal silicon substrate; forming a transparent insulator layer on a metal substrate; performing a surface activation treatment with respect...http://www.google.com/patents/US8129612?utm_source=gb-gplus-sharePatent US8129612 - Method for manufacturing single-crystal silicon solar cell and single-crystal silicon solar cellAdvanced Patent SearchPublication numberUS8129612 B2Publication typeGrantApplication numberUS 12/076,916Publication dateMar 6, 2012Filing dateMar 25, 2008Priority dateApr 9, 2007Also published asCN101286537A, CN101286537B, EP1981092A2, EP1981092A3, EP1981092B1, US20080245408Publication number076916, 12076916, US 8129612 B2, US 8129612B2, US-B2-8129612, US8129612 B2, US8129612B2InventorsAtsuo Ito, Shoji Akiyama, Makoto Kawai, Koichi Tanaka, Yuuji Tobisaka, Yoshihiro KubotaOriginal AssigneeShin-Etsu Chemical Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (46), Non-Patent Citations (31), Classifications (13), Legal Events (1) External Links: USPTO, USPTO Assignment, EspacenetMethod for manufacturing single-crystal silicon solar cell and single-crystal silicon solar cellUS 8129612 B2Abstract There is disclosed a method for manufacturing a single-crystal silicon solar cell including the steps of: implanting a hydrogen ion or a rare gas ion into a single-crystal silicon substrate; forming a transparent insulator layer on a metal substrate; performing a surface activation treatment with respect to at least one of the ion implanted surface and a surface of the transparent insulator layer; bonding these surfaces; mechanically delaminating the single-crystal silicon substrate to provide a single-crystal silicon layer; forming a plurality of second conductivity type diffusion regions in the delaminated surface side of the single-crystal silicon layer so that a plurality of first conductivity type regions and the plurality of second conductivity regions are present in the delaminated surface of the single-crystal silicon layer; respectively forming a plurality of individual electrodes on the plurality of first and second conductivity type regions of the single-crystal silicon layer; forming respective collecting electrodes; and forming a transparent protective film.
What is claimed is: 1. A method for manufacturing a single-crystal silicon solar cell in which at least a metal substrate, a single-crystal silicon layer as a light conversion layer, and a transparent protective film are laminated and the transparent protective film side serves as a light receiving surface, the method comprising the steps of:
The amorphous silicon solar cell is obtained by decomposing a silane gas in a gas phase by discharge based on, e.g., a plasma CVD method to form an amorphous silicon hydride film on a substrate, adding diborane, phosphine, and others as a doping gas to be simultaneously deposited, and simultaneously effecting formation of p-n junctions and that of a film to form electrodes and a protective film. In the amorphous silicon solar cell, since amorphous silicon is of a direct transition type that absorbs an incident light, its optical absorption coefficient is approximately one digit higher (Kiyoshi TAKAHASHI, Yoshihiro HAMAKAWA, and Akio USHIROKAWA, �Taiyo-ko Hatsuden (Photovoltaic Power Generation)�, Morikita Shuppan, 1980, p. 233) than those of single crystal and polysilicon, and hence there is an advantage that approximately 1 μm that is approximately 1/100 of a film thickness of a crystal-based solar cell can suffice as a thickness of the amorphous silicon layer. In recent years, a production volume of solar batteries has exceeded one gigawatt per year in the world. Considering a further growth of the production volume in the future, an expectation about the thin-film amorphous silicon solar cell which can effectively exploit resources is considerable.
On the other hand, developing a thin-film solar cell by using a crystal-based silicon material has been attempted in many ways (Kiyoshi TAKAHASHI, Yoshihiro HAMAKAWA, and Akio USHIROKAWA, �Taiyo-ko Hatsuden (Photovoltaic Power Generation)�, Morikita Shuppan, 1980, p. 217). For example, a polycrystalline thin film is deposited on an alumina substrate or a graphite substrate by using, e.g., a trichlorosilane gas or a tetrachlorosilane gas. Since this deposited film has many crystal defects and a conversion efficiency remains low when this film is left as it is, zone melting must be carried out to improve crystallinity in order to raise the conversion efficiency (see, e.g., Japanese Patent Application Laid-open No. 2004-342909). However, even if such a method based on zone melting is adopted, there is a problem of, e.g., a reduction in photoelectric response characteristics in a long wavelength band due to a leak current at a crystal grain boundary or a decrease in a lifetime.
SUMMARY OF THE INVENTION In view of the above-explained problem, it is an object of the present invention to provide a thin-film single-crystal silicon solar cell which has a light conversion layer formed as a thin film in order to effectively exploit silicon as a raw material of the silicon solar cell, excellent conversion characteristics, and less degradation due to irradiation of a light as a solar cell having a light confinement structure in which an efficiency is raised as much as possible for a film thickness, and also provide a manufacturing method thereof.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a process drawing showing an example of a method for manufacturing a single-crystal silicon solar cell according to the present invention; and
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As explained above, in a thin-film solar cell which can economize a silicon raw material, a higher conversion efficiency is likewise desired, and adopting a crystal-based solar cell to further improve crystallinity is demanded.
EXAMPLES The present invention will now be specifically explained based on an example.
Example 1 As the single-crystal silicon substrate 11, a p-type single-crystal silicon substrate having a diameter of 200 mm (eight inches), a crystal plane (100), and a surface resistance of 15 Ωcm was prepared. Furthermore, as the metal substrate 12, a substrate obtained by depositing 20 nm of silver on stainless (SUS304) having a thickness of 200 μm and a diameter of 200 mm by an evaporation method (a silver deposited stainless substrate) was prepared (step a).
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No. 12/073,437.Classifications U.S. Classification136/255, 257/E31.11, 438/69International ClassificationH01L31/028, H01L31/04Cooperative ClassificationH01L31/0527, H01L31/1892, H01L31/068, H01L31/1804, Y02E10/52, Y02E10/547European ClassificationH01L31/18C, H01L31/068Legal EventsDateCodeEventDescriptionMar 25, 2008ASAssignmentOwner name: SHIN-ETSU CHEMICAL CO., LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ITO, ATSUO;AKIYAMA, SHOJI;KAWAI, MAKOTO;AND OTHERS;REEL/FRAME:020754/0529;SIGNING DATES FROM 20080304 TO 20080322Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ITO, ATSUO;AKIYAMA, SHOJI;KAWAI, MAKOTO;AND OTHERS;SIGNING DATES FROM 20080304 TO 20080322;REEL/FRAME:020754/0529RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google