JPH11330507A - Solar cell - Google Patents

Solar cell

Info

Publication number
JPH11330507A
JPH11330507A JP10128827A JP12882798A JPH11330507A JP H11330507 A JPH11330507 A JP H11330507A JP 10128827 A JP10128827 A JP 10128827A JP 12882798 A JP12882798 A JP 12882798A JP H11330507 A JPH11330507 A JP H11330507A
Authority
JP
Japan
Prior art keywords
film
iii
compound semiconductor
semiconductor film
solar cell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
JP10128827A
Other languages
Japanese (ja)
Inventor
Takeshi Kamiya
武志 神谷
Kenji Sato
賢次 佐藤
Takeshi Iketani
剛 池谷
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yazaki Corp
Original Assignee
Yazaki Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yazaki Corp filed Critical Yazaki Corp
Priority to JP10128827A priority Critical patent/JPH11330507A/en
Publication of JPH11330507A publication Critical patent/JPH11330507A/en
Withdrawn legal-status Critical Current

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Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/541CuInSe2 material PV cells

Abstract

PROBLEM TO BE SOLVED: To provide a solar cell having a I-III-VI2 -based compound semiconduc tor at low costs which can prevent occurrence of a short-circuit even if an area increases. SOLUTION: In a solar cell 10 sequently having a I-III-VI2 -based compound semiconductor film 3, a II-VI-based compound semiconductor film 4, and transparent conductive films 5, 6, a film thickness of the II-VI-based compound semiconductor film is set to 2500 to 10000 Å (In the formula, I, II, III and VI are the I group elements, the II group elements, the III group elements and the VI group elements of the periodic law, respectively.). The I-III-VI2 -based compound semiconductor film is constituted by a compound composed of, for example, CuInSe2 , CiInS2 , Cu(In, Ga)Se2 , CuIn(S, Se)2 , Cu(In, Ga)(Se, S)2 or Cu(In,Ga)S2 , and also the II-VI-based compound semiconductor film is constituted by a compound composed of, for example, CdS, ZnS, ZnSe, CdSe, ZnTe or ZnO.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、金属セレンを気化
させてセレン化することにより得られるCuInSe2
等のI−III−VI2系化合物半導体膜を有する太陽
電池に関する。以下、本明細書においては、I、II、
III及びVIは、それぞれ、周期律表の第I族元素、
第II族元素、第III族元素及び第VI族元素を意味
するものとする。
The present invention relates to CuInSe 2 obtained by vaporizing metallic selenium and converting the metal to selenium.
And the like having a I-III-VI 2 -based compound semiconductor film. Hereinafter, in this specification, I, II,
III and VI are respectively group I elements of the periodic table,
Group II, III, and VI elements are meant.

【0002】[0002]

【従来の技術】図2は、従来のCuInSe2 で構成さ
れる化合物半導体膜を有する太陽電池の断面説明図であ
る。図2において、110は、従来のCuInSe2
構成される化合物半導体膜を有する太陽電池である。従
来のCuInSe2 で構成される化合物半導体膜を有す
る太陽電池110は、ガラス基板101、Mo膜10
2、CuInSe2 膜103、CdS膜104、ZnO
膜105及びAlをドープしたZnO膜(以下、本明細
書では、「ZnO:Al膜」という。)106を順次有
している。
BACKGROUND OF THE INVENTION FIG 2 is a cross sectional view showing a solar cell having a compound semiconductor film composed of a conventional CuInSe 2. In FIG. 2, reference numeral 110 denotes a solar cell having a conventional compound semiconductor film composed of CuInSe 2 . A conventional solar cell 110 having a compound semiconductor film composed of CuInSe 2 includes a glass substrate 101, a Mo film 10
2, CuInSe 2 film 103, CdS film 104, ZnO
A film 105 and an Al-doped ZnO film (hereinafter, referred to as “ZnO: Al film”) 106 are sequentially provided.

【0003】このような従来のCuInSe2 で構成さ
れる化合物半導体膜を有する太陽電池110の製造にお
いては、ガラス基板101として、通常、約1mm厚の
ソーダライムガラス等よりなる基板を用いる。ガラス基
板101の上には、裏面電極として、Mo膜102を例
えばスッパタリングにより1〜2μmの厚さに形成す
る。Mo膜102の上には、p型半導体層として、Cu
InSe2 膜103を例えばCu、In及びSeの3元
同時蒸着により1〜2μmの厚さに形成する。Cu、I
n及びSeの3元同時蒸着は、真空容器の中において、
ヒーターにより350〜400℃に加熱した基板上に金
属Cu、金属In及び金属Seよりなる3つの蒸着源か
ら同時に蒸発させた各蒸気を蒸着させてCuInSe2
膜を成膜することにより行われる。
In manufacturing such a conventional solar cell 110 having a compound semiconductor film composed of CuInSe 2 , a substrate made of soda lime glass or the like having a thickness of about 1 mm is usually used as the glass substrate 101. On the glass substrate 101, a Mo film 102 is formed as a back electrode to a thickness of 1 to 2 μm by, for example, sputtering. On the Mo film 102, as a p-type semiconductor layer, Cu
The InSe 2 film 103 is formed to a thickness of 1 to 2 μm by, for example, ternary simultaneous deposition of Cu, In, and Se. Cu, I
The ternary simultaneous deposition of n and Se is performed in a vacuum vessel,
On a substrate heated to 350 to 400 ° C. by a heater, vapors vaporized simultaneously from three vapor deposition sources composed of metal Cu, metal In and metal Se are vapor-deposited to form CuInSe 2.
This is performed by forming a film.

【0004】このように形成された「基板1の上にMo
膜102及びCuInSe2 膜103を順次有する」積
層体をCd3(CH3COO)2、N24S及びNH4OH
よりなる溶液に浸漬することにより、CuInSe2
103の上に、バッファー層として、CdS膜104を
0.05μm、即ち、500Åの厚さに形成する。この
ような溶液成長法によるCdS膜104の形成方法は、
一般的な方法であって、応用物理第62巻第2号(19
93年2月発行)第139〜142頁に記載されてお
り、CBD法と呼ばれている。特公平6−14558号
公報には、このようなバッファー層として、100〜1
500Åのものを用いることが記載され、300〜35
0Åのものを用いることが好ましいと記載されている。
[0004] The thus formed "Mo on the substrate 1"
A laminate having a film 102 and a CuInSe 2 film 103 sequentially ”is formed of Cd 3 (CH 3 COO) 2 , N 2 H 4 S, and NH 4 OH.
A CdS film 104 is formed as a buffer layer on the CuInSe 2 film 103 to a thickness of 0.05 μm, that is, a thickness of 500 °, by immersion in a solution comprising the CuInSe 2 film 103. The method of forming the CdS film 104 by such a solution growth method is as follows.
This is a general method and is described in Applied Physics Vol. 62, No. 2 (19
(Published in February 1993), pp. 139-142, which is called the CBD method. Japanese Patent Publication No. 6-14558 discloses such a buffer layer as 100 to 1
It is described that 500 mm is used, and 300 to 35
It is stated that it is preferable to use the one of 0 °.

【0005】そして、CdS膜104の上には、透明電
極として、ZnO膜105を0.03mμの厚さにスパ
ッタリングにより形成し、続いて、ZnO:Al膜10
6を1〜2μmの厚さにスパッタリングにより形成す
る。
A ZnO film 105 is formed on the CdS film 104 as a transparent electrode by sputtering to a thickness of 0.03 μm, and then a ZnO: Al film 10 is formed.
6 is formed to a thickness of 1 to 2 μm by sputtering.

【0006】[0006]

【発明が解決しようとする課題】しかしながら、このよ
うな従来のp型半導体層としてI−III−VI2 系化
合物半導体を有する太陽電池は、大面積化しようとする
と、短絡が発生するという問題があった。
However, such a conventional solar cell having an I-III-VI 2 -based compound semiconductor as a p-type semiconductor layer has a problem that a short circuit occurs when the area is increased. there were.

【0007】本発明は、かかる問題を解決することを目
的としている。即ち、本発明は、大面積化しても短絡の
発生を防止できるI−III−VI2系化合物半導体を
有する太陽電池を低コストで提供することを目的とす
る。
An object of the present invention is to solve such a problem. That is, an object of the present invention is to provide a low-cost solar cell having an I-III-VI 2 -based compound semiconductor that can prevent a short circuit even when the area is increased.

【0008】[0008]

【課題を解決するための手段】本発明者は、I−III
−VI2 からなる化合物半導体膜を有する太陽電池を大
面積化したときに起こる短絡の原因を鋭意探求したとこ
ろ、第I族元素、第III族元素及びIV族元素の3元
同時蒸着によりI−III−VI2 からなる化合物半導
体膜を成膜する際にその表面に凹凸が発生し、かかる凹
凸を有するI−III−VI2 からなる化合物半導体膜
の上に、バッファー層として、従来のように100〜1
500Å程度の超薄膜のI−III−VIからなる化合
物半導体膜、II−VIからなる化合物半導体膜又はI
II−VI系化合物半導体膜を形成すると、カバーリン
グが完全に出来ず、その部分で、I−III−VI2
らなる化合物半導体膜と透明導電膜とが接触して短絡を
起こすので、バッファー層を2500〜10000Åと
厚くすれば、カバーリングが完全にでき、エネルギー変
換効率を大きく落さずに短絡の発生を防止できることを
見出して、本発明を完成するに至った。
Means for Solving the Problems The present inventors have proposed I-III
Was intensively explored the cause of the short circuit that occurs when a large area of the solar cell having a compound semiconductor film made of -VI 2, Group I elements, the ternary simultaneous deposition of group III element and a Group IV element I- When a compound semiconductor film made of III-VI 2 is formed, irregularities are generated on the surface thereof. On the compound semiconductor film made of I-III-VI 2 having such irregularities, as a buffer layer, 100-1
A compound semiconductor film of I-III-VI, a compound semiconductor film of II-VI or I
When the II-VI-based compound semiconductor film is formed, the covering cannot be completely performed, and the compound semiconductor film composed of I-III-VI 2 and the transparent conductive film are in contact with each other at that portion, causing a short circuit. It has been found that if the thickness is increased to 2500-10000 °, the covering can be completed completely and the occurrence of a short circuit can be prevented without greatly lowering the energy conversion efficiency, and the present invention has been completed.

【0009】本第1発明は、I−III−VI2 系化合
物半導体膜、II−VI系化合物半導体膜及び透明導電
膜を順次有する太陽電池において、II−VI系化合物
半導体膜の膜厚を2500〜10000Åにしたことを
特徴とする太陽電池である。
The first invention is directed to a solar cell having an I-III-VI 2 -based compound semiconductor film, an II-VI-based compound semiconductor film and a transparent conductive film in that order, wherein the II-VI-based compound semiconductor film has a thickness of 2500. A solar cell characterized by having a temperature of up to 10,000 °.

【0010】本第2発明は、第1発明において、I−I
II−VI2 系化合物半導体膜をCuInSe2 、Cu
InS2、Cu(In,Ga)Se2、CuIn(Se,
S) 2 、Cu(In,Ga)(Se,S)2又はCu
(In,Ga)S2よりなる化合物で構成することを特
徴とするものである。
[0010] The second invention is the first invention, wherein the I-I
II-VITwo -Based compound semiconductor film with CuInSeTwo , Cu
InSTwo, Cu (In, Ga) SeTwo, CuIn (Se,
S) Two , Cu (In, Ga) (Se, S)TwoOr Cu
(In, Ga) STwoConsisting of a compound consisting of
It is a sign.

【0011】本第3発明は、第2又は3発明において、
II−VI系化合物半導体膜をCdS、ZnS、ZnS
e、CdSe、ZnTe又はZnOよりなる化合物で構
成することを特徴とするものである。
[0011] The third invention is the second or third invention, wherein
CdS, ZnS, ZnS for II-VI based compound semiconductor film
e, CdSe, ZnTe or ZnO.

【0012】本第4発明は、I−III−VI2 系化合
物半導体膜、I−III−VI系化合物半導体膜及び透
明導電膜を順次有する太陽電池において、I−III−
VI系化合物半導体膜の膜厚を2500〜10000Å
にしたことを特徴とする太陽電池である。
The fourth invention relates to a solar cell having an I-III-VI 2 -based compound semiconductor film, an I-III-VI-based compound semiconductor film and a transparent conductive film in that order.
The thickness of the VI-based compound semiconductor film is 2500-10000Å
A solar cell characterized by the following.

【0013】本題5発明は、第4発明において、I−I
II−VI2 系化合物半導体膜をCuInSe2 、Cu
InS2、Cu(In,Ga)Se2、CuIn(S,S
e) 2 、Cu(In,Ga)(Se,S)2又はCu
(In,Ga)S2よりなる化合物で構成することを特
徴とするものである。
[0013] The fifth subject of the present invention is the fourth subject of the present invention, wherein I-I
II-VITwo -Based compound semiconductor film with CuInSeTwo , Cu
InSTwo, Cu (In, Ga) SeTwo, CuIn (S, S
e) Two , Cu (In, Ga) (Se, S)TwoOr Cu
(In, Ga) STwoConsisting of a compound consisting of
It is a sign.

【0014】本第6発明は、第4又は5発明において、
I−III−VI系化合物半導体膜をCuIn3Se5
Cu3In5Se9、Cu2In4Se7又はCuIn5Se8
よりなる化合物で構成することを特徴とするものであ
る。
According to a sixth aspect of the present invention, in the fourth or fifth aspect,
The I-III-VI-based compound semiconductor film is formed of CuIn 3 Se 5 ,
Cu 3 In 5 Se 9 , Cu 2 In 4 Se 7 or CuIn 5 Se 8
Characterized by comprising a compound consisting of

【0015】本第7発明は、I−III−VI2 系化合
物半導体膜、III−VI系化合物半導体膜及び透明導
電膜を順次有する太陽電池において、III−VI系化
合物半導体膜の膜厚を2500〜10000Åにしたこ
とを特徴とする太陽電池である。
According to a seventh aspect of the present invention, in a solar cell having an I-III-VI 2 -based compound semiconductor film, a III-VI-based compound semiconductor film and a transparent conductive film sequentially, the thickness of the III-VI-based compound semiconductor film is 2,500. A solar cell characterized by having a temperature of up to 10,000 °.

【0016】本第8発明は、第7発明において、I−I
II−VI2 系化合物半導体膜をCuInSe2 、Cu
InS2、Cu(In,Ga)Se2、CuIn(S,S
e) 2 、Cu(In,Ga)(Se,S)2又はCu
(In,Ga)S2よりなる化合物で構成することを特
徴とするものである。
According to an eighth aspect, in the seventh aspect, the II
II-VITwo -Based compound semiconductor film with CuInSeTwo , Cu
InSTwo, Cu (In, Ga) SeTwo, CuIn (S, S
e) Two , Cu (In, Ga) (Se, S)TwoOr Cu
(In, Ga) STwoConsisting of a compound consisting of
It is a sign.

【0017】本第9発明は、第7又は8発明において、
III−VI系化合物半導体膜をIn2Se3 、In2
e、In5Se6、InSe、GaSe又はGa2Se3
りなる化合物で構成することを特徴とするものである。
According to a ninth invention, in the seventh or eighth invention,
III-VI based compound semiconductor film is formed of In 2 Se 3 , In 2 S
e, a compound composed of In 5 Se 6 , InSe, GaSe or Ga 2 Se 3 .

【0018】[0018]

【発明の実施の形態】以下、図面を参照しながら、本発
明の実施の形態を説明する。図1は、本発明の一実施の
形態を示すCuInSe2 で構成される化合物半導体膜
を有する太陽電池の断面説明図である。図1において、
10は、CuInSe2 で構成される化合物半導体膜を
有する太陽電池である。CuInSe2 で構成される化
合物半導体を有する太陽電池10は、ガラス板基1、M
o膜2、CuInSe2 膜3、CdS膜4、ZnO膜5
及びZnO:Al膜6を順次有している。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory cross-sectional view of a solar cell having a compound semiconductor film composed of CuInSe 2 according to an embodiment of the present invention. In FIG.
Reference numeral 10 denotes a solar cell having a compound semiconductor film composed of CuInSe 2 . A solar cell 10 having a compound semiconductor composed of CuInSe 2 has a glass substrate 1, M
o film 2, CuInSe 2 film 3, CdS film 4, ZnO film 5
And a ZnO: Al film 6 in sequence.

【0019】このようなCuInSe2 で構成される化
合物半導体を有する太陽電池10の製造においては、ガ
ラス基板1として、約1mm厚のソーダライムガラス等
よりなる基板が用いる。ガラス基板1の上には、裏面電
極として、Mo膜2を例えばスッパタリングにより1〜
2μmの厚さに形成する。Mo膜2の上には、p型半導
体層として、CuInSe2 膜3を例えばCu、In及
びSeの3元同時蒸着により1〜2μmの厚さに形成す
る。Cu、In及びSeの3元同時蒸着は、真空容器の
中において、ヒーターにより350〜400℃に加熱し
た基板上に金属Cu、金属In及び金属Seよりなる3
つの蒸着源から同時に蒸発させた各蒸気を蒸着させてC
uInSe2 膜を成膜することにより行なう。
In the manufacture of solar cell 10 having such a compound semiconductor composed of CuInSe 2 , a glass substrate 1 made of soda lime glass or the like having a thickness of about 1 mm is used. On the glass substrate 1, a Mo film 2 is formed as a back electrode by sputtering, for example.
It is formed to a thickness of 2 μm. On the Mo film 2, a CuInSe 2 film 3 is formed as a p-type semiconductor layer to a thickness of 1 to 2 μm by, for example, ternary simultaneous deposition of Cu, In and Se. The ternary simultaneous vapor deposition of Cu, In and Se is performed by depositing metal Cu, metal In and metal Se on a substrate heated to 350 to 400 ° C. by a heater in a vacuum vessel.
Vapor from each of the two evaporation sources at the same time
This is performed by forming a uInSe 2 film.

【0020】このように形成したCuInSe2 膜3の
上に、真空条件下、基板温度200℃において、バッフ
ァー層として、CdS膜4を2500〜10000Å厚
に蒸着レート10Å/sで成膜する。
On the thus formed CuInSe 2 film 3, a CdS film 4 is formed as a buffer layer at a substrate temperature of 200 ° C. under a vacuum condition at a deposition rate of 10 ° / s to a thickness of 2500 to 10000 °.

【0021】そして、CdS膜4の上には、透明電極と
して、ZnO膜5を0.03μmの厚さにスパッタリン
グにより形成し、続いて、ZnO:Al膜6を1〜2μ
mの厚さにスパッタリングにより形成する。
A ZnO film 5 is formed on the CdS film 4 as a transparent electrode by sputtering to a thickness of 0.03 μm, and then a ZnO: Al film 6 is formed to a thickness of 1 to 2 μm.
It is formed by sputtering to a thickness of m.

【0022】本発明におけるI−III−VI2 系化合
物半導体膜は、好ましくは、CuInSe2 、CuIn
2、Cu(In,Ga)Se2、CuIn(S,Se)
2 、Cu(In,Ga)(S,Se)2又はCu(I
n,Ga)S2よりなる化合物で構成されるが、本発明
の目的に反しない限り、その他のI−III−VI2
含まれる化合物であってもかまわない。
The I-III-VI 2 -based compound semiconductor film of the present invention is preferably made of CuInSe 2 , CuIn
S 2 , Cu (In, Ga) Se 2 , CuIn (S, Se)
2 , Cu (In, Ga) (S, Se) 2 or Cu (I
n, is composed of a compound consisting of Ga) S 2, unless contrary to the object of the present invention, may be a compound that is included in the other I-III-VI 2.

【0023】本発明のおけるI−III−VI系化合物
半導体膜は、CuIn3Se5、Cu 3In5Se9、Cu2
In4Se7又はCuIn5Se8よりなる化合物で構成さ
れるが、本発明の目的に反しない限り、その他のI−I
II−VIに含まれる化合物であってもかまわない。
I-III-VI compounds of the present invention
The semiconductor film is CuInThreeSeFive, Cu ThreeInFiveSe9, CuTwo
InFourSe7Or CuInFiveSe8Consists of a compound consisting of
However, unless otherwise contrary to the purpose of the present invention, other I-I
It may be a compound contained in II-VI.

【0024】本発明におけるII−VI系化合物半導体
膜は、CdS、ZnS、ZnSe、CdSe、ZnTe
又はZnOよりなる化合物で構成されるが、本発明の目
的に反しない限り、その他のI−III−VIに含まれ
る化合物であってもかまわない。
The II-VI compound semiconductor film in the present invention is made of CdS, ZnS, ZnSe, CdSe, ZnTe.
Alternatively, it is composed of a compound composed of ZnO, but may be a compound contained in other I-III-VI as long as the object of the present invention is not violated.

【0025】本発明におけるIII−VI系化合物半導
体膜は、In2Se3 、In2Se、In5Se6、InS
e、GaSe又はGa2Se3よりなる化合物で構成され
るが、本発明の目的に反しない限り、その他のI−II
I−VIに含まれる化合物であってもかまわない。
The III-VI compound semiconductor film of the present invention is made of In 2 Se 3 , In 2 Se, In 5 Se 6 , InS
e, GaSe or Ga 2 Se 3, but other compounds I-II, as long as they do not contradict the purpose of the present invention.
It may be a compound included in I-VI.

【0026】[0026]

【実施例】(実施例1)ソーダライムガラス基板上にス
パッタリングにより1〜2μm厚のMo膜を成膜した。
このMo膜を成膜したソーダライムガラス基板上に、真
空条件下、基板温度200℃において、In2Se3を蒸
着源として、真空蒸着により、1μm厚のIn及びSe
を含む膜(以下、「In−Se膜」という)を蒸着レー
ト10Å/sで成膜した。このように成膜したIn−S
e膜上に、真空条件下、基板温度;室温において、金属
Cuを蒸着源として真空蒸着により、0.2μm厚のC
u膜を蒸着レート10Å/sで成膜して、プリカーサを
形成した。このように形成したプリカーサをカーボンボ
ックス中において固体セレンをSe源として550℃で
1時間セレン化してCuInSe2 膜を形成した。この
ように成形したCuInSe2 膜上に、真空条件下、基
板温度500℃ににおいて、Cu、In及びSeを蒸着
源とする真空同時蒸着により、0.3μm(3000
Å)厚のCuIn3 Se5 膜を蒸着レート10Å/sで
成膜した。そして、このように成膜したCuIn3Se5
膜上に、スパッタリングにより、0.03μm厚のZn
O膜を成膜し、続いて、0.7μm厚のZnO:Al膜
を成膜した。このようにして得られた5cm×5cmの
大きさの積層膜を25分割して太陽電池の評価を行った
ところ、エネルギー変換効率は10%であり、そして、
短絡は発生しなかった。
(Example 1) A Mo film having a thickness of 1 to 2 μm was formed on a soda lime glass substrate by sputtering.
On a soda-lime glass substrate on which this Mo film was formed, 1 μm thick In and Se were vacuum-deposited at a substrate temperature of 200 ° C. using In 2 Se 3 as a deposition source.
(Hereinafter referred to as “In-Se film”) was formed at a deposition rate of 10 ° / s. In-S film thus formed
On the e-film, at a substrate temperature under vacuum conditions; at room temperature, 0.2 μm thick C
A u film was formed at a deposition rate of 10 ° / s to form a precursor. The precursor thus formed was selenized in a carbon box at 550 ° C. for 1 hour using solid selenium as a Se source to form a CuInSe 2 film. On the thus formed CuInSe 2 film, at a substrate temperature of 500 ° C. under vacuum conditions, a vacuum co-evaporation using Cu, In, and Se as an evaporation source was performed to a thickness of 0.3 μm (3000 μm).
Å) A thick CuIn 3 Se 5 film was formed at a deposition rate of 10Å / s. Then, CuIn 3 Se 5 thus formed is formed.
A 0.03 μm thick Zn film is formed on the film by sputtering.
An O film was formed, followed by a 0.7 μm thick ZnO: Al film. When the thus obtained laminated film having a size of 5 cm × 5 cm was divided into 25 and evaluated for a solar cell, the energy conversion efficiency was 10%, and
No short circuit occurred.

【0027】(実施例2)ソーダライムガラス基板上に
スパッタリングにより1〜2μm厚のMo膜を成膜し
た。このMo膜を成膜したソーダライムガラス基板上
に、真空条件下、基板温度200℃において、In2
3を蒸着源として、真空蒸着により、1μm厚のIn
−Se膜を蒸着レート10Å/sで成膜した。このよう
に成膜したIn−Se膜上に、真空条件下、基板温度;
室温において、金属Cuを蒸着源として真空蒸着によ
り、0.2μm厚のCu膜を蒸着レート10Å/sで成
膜して、プリカーサを形成した。このように形成したプ
リカーサをカーボンボックス中において固体セレンをS
e源として550℃で1時間セレン化してCuInSe
2 膜を形成した。このように成形したCuInSe2
上に、真空条件下、基板温度200℃ににおいて、0.
3μm(3000Å)厚のCdS膜を蒸着レート10Å
/sで成膜した。そして、このように成膜したCdS膜
上に、スパッタリングにより、0.03μm厚のZnO
膜を成膜し、続いて、0.7μm厚のZnO:Al膜を
成膜した。このようにして得られた5cm×5cmの大
きさの積層膜を25分割して太陽電池の評価を行ったと
ころ、エネルギー変換効率は12.8%であり、そし
て、短絡は発生しなかった。
Example 2 An Mo film having a thickness of 1 to 2 μm was formed on a soda lime glass substrate by sputtering. On a soda-lime glass substrate on which this Mo film was formed, In 2 S at a substrate temperature of 200 ° C. under vacuum conditions.
e 3 was used as a deposition source, and a 1 μm thick In
A -Se film was formed at a deposition rate of 10 ° / s. On the In-Se film thus formed, the substrate temperature under vacuum conditions;
At room temperature, a 0.2 μm-thick Cu film was formed at a deposition rate of 10 ° / s by vacuum deposition using metal Cu as a deposition source to form a precursor. The solid selenium is added to the precursor formed in this way in a carbon box.
CuInSe for 1 hour at 550 ° C as e source
Two films were formed. On the thus formed CuInSe 2 film, the substrate was heated at a substrate temperature of 200 ° C. under a vacuum condition at a temperature of 0.1 mm.
A 3 μm (3000 °) thick CdS film is deposited at a deposition rate of 10 °.
/ S. Then, a 0.03 μm thick ZnO film is formed on the CdS film thus formed by sputtering.
After forming a film, a ZnO: Al film having a thickness of 0.7 μm was formed. When the thus obtained laminated film having a size of 5 cm × 5 cm was divided into 25 and evaluated for a solar cell, the energy conversion efficiency was 12.8%, and no short circuit occurred.

【0028】(実施例3)ソーダライムガラス基板上に
スパッタリングにより1〜2μm厚のMo膜を成膜し
た。このMo膜を成膜したソーダライムガラス基板上
に、真空条件下、基板温度200℃において、In2
3を蒸着源として、真空蒸着により、1μm厚のIn
−Se膜を蒸着レート10Å/sで成膜した。このよう
に成膜したIn−Se膜上に、真空条件下、基板温度;
室温において、金属Cuを蒸着源として真空蒸着によ
り、0.2μm厚のCu膜を蒸着レート10Å/sで成
膜して、プリカーサを形成した。このように形成したプ
リカーサをカーボンボックス中において固体セレンをS
e源として550℃で1時間セレン化してCuInSe
2 膜を形成した。このように成形したCuInSe2
上に、真空条件下、基板温度200℃ににおいて、0.
3μm(3000Å)厚のIn2Se3膜を蒸着レート1
0Å/sで成膜した。そして、このように成膜したIn
2Se3膜上に、スパッタリングにより、0.03μm厚
のZnO膜を成膜し、続いて、0.7μm厚のZnO:
Al膜を成膜した。このようにして得られた5cm×5
cmの大きさの積層膜を25分割して太陽電池の評価を
行ったところ、エネルギー変換効率は9.5%であり、
そして、短絡は発生しなかった。
Example 3 A Mo film having a thickness of 1 to 2 μm was formed on a soda lime glass substrate by sputtering. On a soda-lime glass substrate on which this Mo film was formed, In 2 S at a substrate temperature of 200 ° C. under vacuum conditions.
e 3 was used as a deposition source, and a 1 μm thick In
A -Se film was formed at a deposition rate of 10 ° / s. On the In-Se film thus formed, the substrate temperature under vacuum conditions;
At room temperature, a 0.2 μm-thick Cu film was formed at a deposition rate of 10 ° / s by vacuum deposition using metal Cu as a deposition source to form a precursor. The solid selenium is added to the precursor formed in this way in a carbon box.
CuInSe for 1 hour at 550 ° C as e source
Two films were formed. On the thus formed CuInSe 2 film, the substrate was heated at a substrate temperature of 200 ° C. under a vacuum condition at a temperature of 0.1 μm.
3 μm (3000 °) thick In 2 Se 3 film is deposited at a deposition rate of 1
The film was formed at 0 ° / s. Then, the In film thus formed is formed.
On the 2Se 3 film, a ZnO film having a thickness of 0.03 μm is formed by sputtering, followed by a ZnO film having a thickness of 0.7 μm:
An Al film was formed. 5cm x 5 obtained in this way
When the solar cell was evaluated by dividing the laminated film having a size of cm into 25, the energy conversion efficiency was 9.5%.
Then, no short circuit occurred.

【0029】(従来例1)ソーダライムガラス基板上に
スパッタリングにより1〜2μm厚のMo膜を成膜し
た。このMo膜を成膜したソーダライムガラス基板上
に、真空条件下で、Cu、In、Seの蒸着源を同時蒸
着させてCuInSe2 膜形成し、その上にCBD法に
てCdS膜を500〜1000μm程度の膜厚に成膜し
た。そして、このように成膜したCdS膜上に、スパッ
タリングにより、0.03μm厚のZnO膜を成膜し、
続いて、0.7μm厚のZnO:Al膜を成膜した。こ
のようにして得られた5cm×5cmの大きさの積層膜
を25分割して太陽電池の評価を行ったところ、そのエ
ネルギー変換効率が12%であり、そして、短絡が所々
発生していた。
(Conventional Example 1) A Mo film having a thickness of 1 to 2 μm was formed on a soda lime glass substrate by sputtering. On a soda-lime glass substrate on which this Mo film was formed, a CuInSe 2 film was formed by simultaneous vapor deposition of a Cu, In, and Se vapor deposition source under vacuum conditions, and a CdS film was formed thereon by a CBD method. The film was formed to a thickness of about 1000 μm. Then, a ZnO film having a thickness of 0.03 μm is formed on the CdS film thus formed by sputtering.
Subsequently, a ZnO: Al film having a thickness of 0.7 μm was formed. The thus obtained laminated film having a size of 5 cm × 5 cm was divided into 25 and evaluated for a solar cell. As a result, the energy conversion efficiency was 12%, and short-circuits occurred in some places.

【0030】実施例1〜3で作成した太陽電池において
は、それらのエネルギー変換効率が、それぞれ、10
%、12.8%及び9.5%であるが、短絡が発生して
おらず、これに対して、従来例1で作成した太陽電池に
おいては、そのエネルギー変換効率が12%であるが、
短絡が所々発生しおり、これらのことから、本発明の太
陽電池は、そのエネルギー変換効率が従来のものと比べ
て多少落ちるものの、大面積化することによりそれをカ
バーすることができるので、従来の太陽電池よりも優れ
ていることがわかる。
In the solar cells prepared in Examples 1 to 3, their energy conversion efficiencies are 10
%, 12.8% and 9.5%, but no short circuit occurred. On the other hand, in the solar cell prepared in Conventional Example 1, the energy conversion efficiency was 12%.
Short-circuits have occurred in some places, and from these facts, the solar cell of the present invention has a slightly reduced energy conversion efficiency as compared with the conventional one, but can cover it by increasing the area. It turns out that it is superior to a solar cell.

【0031】本発明によれば、第I族元素、第III及
びIV族元素の3元同時蒸着によるI−III−VI2
からなる化合物半導体膜は、H2VI を用いたVI化法
によるI−III−VI2 からなる化合物半導体膜や固
体VIを用いたVI化法によるI−III−VI2 から
なる化合物半導体膜と比べて、装置コスト、安全性等に
おいて優れているが、大面積化すると凹凸が激しく発生
する傾向があるので、かかる凹凸を有するI−III−
VI2 からなる化合物半導体膜の上に、バッファー層と
して、従来の100〜1500Å程度よりもずっと厚い
2500〜10000Å厚のI−III−VIからなる
化合物半導体膜、II−VIからなる化合物半導体膜又
はIII−VI系化合物半導体膜を形成すると、I−I
II−VI2 からなる化合物半導体膜の凹凸を完全にカ
バーリングすることができ、そのために、大面積化して
も短絡の発生を防止できるI−III−VI2 系化合物
半導体を有する太陽電池を低コストで提供することがで
きる。
According to the present invention, I-III-VI 2 by ternary co-evaporation of Group I, III and IV elements.
A compound semiconductor film composed of I-III-VI 2 by a VI method using H 2 VI or a compound semiconductor film composed of I-III-VI 2 by a VI method using solid VI. As compared with the above, the apparatus is superior in terms of device cost, safety, and the like. However, when the area is increased, the unevenness tends to be severely generated.
On the compound semiconductor film made of VI 2 , as a buffer layer, a compound semiconductor film made of I-III-VI, a compound semiconductor film made of II-VI having a thickness of 2,500 to 10,000 thick, which is much thicker than the conventional 100 to 1500 °, or a compound semiconductor film made of II-VI, When a III-VI compound semiconductor film is formed, II-VI
The unevenness of the compound semiconductor film made of II-VI 2 can be completely covered, and therefore, a solar cell having an I-III-VI 2 compound semiconductor which can prevent the occurrence of a short circuit even when the area is increased is reduced. Can be provided at cost.

【0032】[0032]

【発明の効果】大面積化しても短絡の発生を防止できる
I−III−VI2 系化合物半導体を有する太陽電池を
低コストで提供することができる。
According to the present invention, it is possible to provide a low-cost solar cell having an I-III-VI 2 compound semiconductor which can prevent the occurrence of a short circuit even when the area is increased.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明の一実施の形態を示すCuInSe2
構成される化合物半導体膜を有する太陽電池の断面説明
図である。
FIG. 1 is an explanatory sectional view of a solar cell having a compound semiconductor film composed of CuInSe 2 according to an embodiment of the present invention.

【図2】従来のCuInSe2 で構成される化合物半導
体膜を有する太陽電池の断面説明図である。
FIG. 2 is an explanatory sectional view of a conventional solar cell having a compound semiconductor film composed of CuInSe 2 .

【符号の説明】[Explanation of symbols]

1 ガラス基板 2 Mo膜 3 CuInSe2 膜 4 CdS膜 5 ZnO膜 6 ZnO:Al膜 10 太陽電池Reference Signs List 1 glass substrate 2 Mo film 3 CuInSe 2 film 4 CdS film 5 ZnO film 6 ZnO: Al film 10 solar cell

Claims (9)

【特許請求の範囲】[Claims] 【請求項1】 I−III−VI2 系化合物半導体膜、
II−VI系化合物半導体膜及び透明導電膜を順次有す
る太陽電池において、II−VI系化合物半導体膜の膜
厚を2500〜10000Åにしたことを特徴とする太
陽電池(式中、I、II、III及びVIは、それぞ
れ、周期律表の第I族元素、第II族元素、第III族
元素及び第VI族の元素である)。
1. An I-III-VI 2- based compound semiconductor film,
In a solar cell having a II-VI-based compound semiconductor film and a transparent conductive film in sequence, a solar cell (wherein I, II, III in the formula, wherein the film thickness of the II-VI-based compound semiconductor film is 2500-10000 °) And VI are Group I, II, III and VI elements of the periodic table, respectively.
【請求項2】 I−III−VI2 系化合物半導体膜を
CuInSe2 、CuInS2、Cu(In,Ga)S
2、CuIn(S,Se)2 、Cu(In,Ga)
(Se,S)2又はCu(In,Ga)S2よりなる化合
物で構成することを特徴とする請求項1記載の太陽電
池。
2. An I-III-VI 2 -based compound semiconductor film is formed of CuInSe 2 , CuInS 2 , Cu (In, Ga) S.
e 2 , CuIn (S, Se) 2 , Cu (In, Ga)
(Se, S) 2 or Cu (In, Ga) solar cell according to claim 1, wherein the configuring compounds consisting of S 2.
【請求項3】 II−VI系化合物半導体膜をCdS、
ZnS、ZnSe、CdSe、ZnTe又はZnOより
なる化合物で構成することを特徴とする請求項1又は2
記載の太陽電池。
3. An II-VI compound semiconductor film comprising CdS,
3. The semiconductor device according to claim 1, which is made of a compound made of ZnS, ZnSe, CdSe, ZnTe or ZnO.
The solar cell as described.
【請求項4】 I−III−VI2 系化合物半導体膜、
I−III−VI系化合物半導体膜及び透明導電膜を順
次有する太陽電池において、I−III−VI系化合物
半導体膜の膜厚を2500〜10000Åにしたことを
特徴とする太陽電池(式中、I、III及びVIは、そ
れぞれ、周期律表の第I族元素、第III族元素及び第
VI族の元素である)。
4. An I-III-VI 2 -based compound semiconductor film,
In a solar cell having an I-III-VI-based compound semiconductor film and a transparent conductive film in order, the thickness of the I-III-VI-based compound semiconductor film is set to 2500 to 10000 °. , III and VI are Group I, III and VI elements of the periodic table, respectively.
【請求項5】 I−III−VI2 系化合物半導体膜を
CuInSe2 、CuInS2、Cu(In,Ga)S
2、CuIn(S,Se)2 、Cu(In,Ga)
(Se,S)2又はCu(In,Ga)S2よりなる化合
物で構成することを特徴とする請求項4記載の太陽電
池。
5. An I-III-VI 2 -based compound semiconductor film formed of CuInSe 2 , CuInS 2 , Cu (In, Ga) S
e 2 , CuIn (S, Se) 2 , Cu (In, Ga)
(Se, S) 2 or Cu (In, Ga) solar cell according to claim 4, wherein the constituting compounds consisting of S 2.
【請求項6】 I−III−VI系化合物半導体膜をC
uIn3Se5、Cu 3In5Se9、Cu2In4Se7又は
CuIn5Se8よりなる化合物で構成することを特徴と
する請求項4又は5記載の太陽電池。
6. An I-III-VI compound semiconductor film formed of C
uInThreeSeFive, Cu ThreeInFiveSe9, CuTwoInFourSe7Or
CuInFiveSe8Characterized by comprising a compound consisting of
The solar cell according to claim 4 or 5, wherein
【請求項7】 I−III−VI2 系化合物半導体膜、
III−VI系化合物半導体膜及び透明導電膜を順次有
する太陽電池において、III−VI系化合物半導体膜
の膜厚を2500〜10000Åにしたことを特徴とす
る太陽電池(式中、I、III及びVIは、それぞれ、
周期律表の第I族元素、第III族元素及び第VI族の
元素である)。
7. An I-III-VI 2- based compound semiconductor film,
In a solar cell having a III-VI compound semiconductor film and a transparent conductive film successively, a film thickness of the III-VI compound semiconductor film is set to 2500 to 10000 ° (wherein I, III and VI Are
Group I, group III and group VI elements of the periodic table).
【請求項8】 I−III−VI2 系化合物半導体膜を
CuInSe2 、CuInS2、Cu(In,Ga)S
2、CuIn(Se,S)2 、Cu(In,Ga)
(S,Se)2又はCu(In,Ga)S2よりなる化合
物で構成することを特徴とする請求項7記載の太陽電
池。
8. An I-III-VI 2 -based compound semiconductor film formed of CuInSe 2 , CuInS 2 , Cu (In, Ga) S
e 2 , CuIn (Se, S) 2 , Cu (In, Ga)
(S, Se) 2 or Cu (In, Ga) solar cell according to claim 7, wherein the configuring compounds consisting of S 2.
【請求項9】 III−VI系化合物半導体膜をIn2
Se3 、In2Se、In5Se6、InSe、GaSe
又はGa2Se3よりなる化合物で構成することを特徴と
する請求項7又は8記載の太陽電池。
9. A method of forming a III-VI compound semiconductor film on an In 2
Se 3 , In 2 Se, In 5 Se 6 , InSe, GaSe
9. The solar cell according to claim 7, wherein the solar cell is made of a compound made of Ga 2 Se 3 .
JP10128827A 1998-05-12 1998-05-12 Solar cell Withdrawn JPH11330507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10128827A JPH11330507A (en) 1998-05-12 1998-05-12 Solar cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10128827A JPH11330507A (en) 1998-05-12 1998-05-12 Solar cell

Publications (1)

Publication Number Publication Date
JPH11330507A true JPH11330507A (en) 1999-11-30

Family

ID=14994397

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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WO2004100250A1 (en) * 2003-05-08 2004-11-18 Solibro Ab A thin-film solar cell
KR100809440B1 (en) 2007-03-09 2008-03-05 한국전자통신연구원 Thin film transistor having n-type and p-type cis thin films and the method of manufacturing the same
JP2010192689A (en) * 2009-02-18 2010-09-02 Tdk Corp Solar cell, and method of manufacturing the same
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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004100250A1 (en) * 2003-05-08 2004-11-18 Solibro Ab A thin-film solar cell
US8865512B2 (en) 2003-05-08 2014-10-21 Solibro Research Ab Thin-film solar cell
KR100809440B1 (en) 2007-03-09 2008-03-05 한국전자통신연구원 Thin film transistor having n-type and p-type cis thin films and the method of manufacturing the same
US7851791B2 (en) 2007-03-09 2010-12-14 Electronics And Telecommunications Research Institute Thin film transistor having N-type and P-type CIS thin films and method of manufacturing the same
US8084295B2 (en) 2007-03-09 2011-12-27 Electronics And Telecommunications Research Institute Thin film transistor having n-type and p-type CIS thin films and method of manufacturing the same
JP2010192689A (en) * 2009-02-18 2010-09-02 Tdk Corp Solar cell, and method of manufacturing the same
EP2309554A3 (en) * 2009-10-09 2016-08-17 Stion Corporation Zinc oxide film method and structure for cigs cell
CN102877101A (en) * 2012-10-09 2013-01-16 哈尔滨理工大学 Method for preparing solar cell buffer layer ZnS film through electro-deposition by taking CuInSe2 film as base
CN102877101B (en) * 2012-10-09 2015-04-15 哈尔滨理工大学 Method for preparing solar cell buffer layer ZnS film through electro-deposition by taking CuInSe2 film as base

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