Title:
SOLAR BATTERY AND ITS FABRICATION METHOD
Document Type and Number:
WIPO Patent Application WO/2007/043219
Kind Code:
A1
Abstract:
[PROBLEMS] To obtain a solar battery having a high photoelectric conversion
efficiency and a high reliability with no aging. [MEANS FOR SOLVING PROBLEMS]
A cell (10) (a unit cell) is formed, comprising a lower electrode layer (2) (Mo
electrode layer) formed on a substrate (1), a light absorption layer (3) (CIGS
light absorption layer) containing copper, indium, gallium, and selenium,
a buffer layer thin film (4) having a high resistance and formed of, for example,
InS, ZnS, or CdS on the light absorption layer (3), and an upper electrode layer
(5) (TCO) formed of, for example, ZnOAl. In order to connect a plurality of the
unit cells (10) in series, a contact electrode portion (6) for connecting the
upper electrode layer (5) with the lower electrode layer (2) is also formed. The
contact electrode portion (6) has a larger Cu/In ratio than that of the light absorption
layer (3). In other words, the contact electrode portion (6) is formed with a smaller
amount of In and exhibits a p+ type or conductor property with respect to the light
absorption layer (3) that is a p-type semiconductor.
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Inventors:
AOKI SATOSHI (JP)
YONEZAWA SATOSHI (JP)
YONEZAWA SATOSHI (JP)
Application Number:
PCT/JP2006/313260
Publication Date:
April 19, 2007
Filing Date:
July 04, 2006
Export Citation:
Assignee:
HONDA MOTOR CO LTD (JP)
AOKI SATOSHI (JP)
YONEZAWA SATOSHI (JP)
AOKI SATOSHI (JP)
YONEZAWA SATOSHI (JP)
International Classes:
H01L31/072; H01L31/0463; H01L31/0465; H01L31/06; H01L31/0749
Foreign References:
| JPH0494174A | 1992-03-26 | |||
| JPH09500236A | 1997-01-07 | |||
| JPH0745844A | 1995-02-14 | |||
| JPH08316511A | 1996-11-29 | |||
| JP2000049371A | 2000-02-18 |
Attorney, Agent or Firm:
KOYAMA, Yuu (Furuya Bldg. 3-29, Kioicho, Chiyoda-k, Tokyo 94, JP)
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