JP2010232256A - 薄膜太陽電池の製法 - Google Patents
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/541—CuInSe2 material PV cells
-
- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
【解決手段】 第1電極層2と第2電極層5との間に光吸収層3を有する薄膜太陽電池の製法であって、CuとSおよびSeのうち少なくとも1種とInおよびGaのうち少なくとも1種とを含む単一前駆体が溶解するとともに、CuとSおよびSeのうち少なくとも1種とを含む前駆体が溶解し、かつInおよびGaのうち少なくとも1種のセレン化物粉末または硫化物粉末が添加され溶解した有機溶媒からなる光吸収層溶液を、第1電極層上に塗布した後、熱処理することにより、CuとSおよびSeのうち少なくとも1種とInおよびGaのうち少なくとも1種とを含有する光吸収層3を形成する光吸収層形成工程と、光吸収層3上に第2電極層5を形成する第2電極層形成工程とを具備する。
【選択図】 図1
Description
まず、P(C6H5)3などのルイス塩基Lと、Cu(CH3CN)4・PF6などのCuの有機金属塩とをアセトニトリルなどの有機溶媒中で反応させて{P(C6H5)3}2Cu(CH3CN)2 +のような形の第1錯イオンが存在する第1錯イオン溶液を作製する。
SまたはSeを含む有機化合物とInまたはGaのハロゲン化物とを含む第2錯イオンを作製する。
次に、第1錯イオンと第2錯イオンとを反応させて、Cuと、SまたはSeと、InまたはGaと、ルイス塩基Lとを含む単一前駆体を作製する。すなわち、Cuを含む第1錯イオン溶液と、InまたはGaとSeまたはSとを含む第2錯イオン溶液とを混合して、第1錯イオンと第2錯イオンとを反応させることにより、CuとSまたはSeとInまたはGaとルイス塩基Lとを含む沈殿物と、この沈殿物の上方の溶液とに分離し、溶液部分を排出し、乾燥することにより、単一前駆体を作製できる。
上記単一前駆体の作製工程とは別に、CuとSまたはSeとを含む前駆体を作製する。
本発明では、上記のようにして作製したCuとSまたはSeとInまたはGaとを含む単一前駆体を有機溶媒に溶解し、さらに、この単一前駆体が溶解した有機溶媒に、CuとSまたはSeとを含む前駆体を溶解し、さらに、InまたはGaのセレン化物粉末または硫化物粉末を添加して溶解し、光吸収層溶液を作製することが重要である。すなわち、CuとSまたはSeとInまたはGaとを含む単一前駆体と、CuとSまたはSeとを含む前駆体と、InまたはGaのセレン化物粉末または硫化物粉末とが有機溶媒にそれぞれ溶解し、光吸収層溶液が作製されている。
この後、光吸収層3の上にヘテロ接合のためのn型のバッファ層4を形成する。バンドギャップが小さくて、短波長側の光を透過しにくい、CdS、ZnS、ZnSe、ZnMgO、ZnO、InS、InSe、In(OH)3、ZnInSe、ZnInS、CuI、Mg(OH)2などの材料が用いられる。これらは、浸漬塗布法、CBD法(溶液成長法)等により光吸収層3まで形成した基板1を水溶液に浸して微粒子を堆積させ、熱処理することにより作製することができる。
2・・・第1電極層
3・・・光吸収層
4・・・バッファ層
5・・・第2電極層
Claims (2)
- CuとSおよびSeのうち少なくとも1種とInおよびGaのうち少なくとも1種とを含む単一前駆体と、CuとSおよびSeのうち少なくとも1種とを含む前駆体と、InおよびGaのうち少なくとも1種のセレン化物粉末または硫化物粉末とが溶解した有機溶媒からなる光吸収層溶液を、第1電極層上に塗布した後、熱処理することにより、CuとSおよびSeのうち少なくとも1種とInおよびGaのうち少なくとも1種とを含有する光吸収層を形成する光吸収層形成工程と、前記光吸収層上に第2電極層を形成する第2電極層形成工程とを具備することを特徴とする薄膜太陽電池の製法。
- CuとSおよびSeのうち少なくとも1種とを含む前駆体は、Cu(CH3CN)2SeC6H5であることを特徴とする請求項1に記載の薄膜太陽電池の製法。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012227377A (ja) * | 2011-04-20 | 2012-11-15 | Kyocera Corp | 半導体層の製造方法および光電変換装置の製造方法 |
JP2013122955A (ja) * | 2011-12-09 | 2013-06-20 | Sharp Corp | 化合物半導体層およびその製造方法、ならびに化合物薄膜太陽電池およびその製造方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050183767A1 (en) * | 2004-02-19 | 2005-08-25 | Nanosolar, Inc. | Solution-based fabrication of photovoltaic cell |
WO2007101136A2 (en) * | 2006-02-23 | 2007-09-07 | Van Duren Jeroen K J | High-throughput formation of semiconductor layer by use of chalcogen and inter-metallic material |
WO2007147184A2 (de) * | 2006-06-22 | 2007-12-27 | Isovolta Ag | Verfahren zum herstellen von photoaktiven schichten sowie bauelemente umfassend diese schicht(en) |
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050183767A1 (en) * | 2004-02-19 | 2005-08-25 | Nanosolar, Inc. | Solution-based fabrication of photovoltaic cell |
WO2007101136A2 (en) * | 2006-02-23 | 2007-09-07 | Van Duren Jeroen K J | High-throughput formation of semiconductor layer by use of chalcogen and inter-metallic material |
WO2007147184A2 (de) * | 2006-06-22 | 2007-12-27 | Isovolta Ag | Verfahren zum herstellen von photoaktiven schichten sowie bauelemente umfassend diese schicht(en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012227377A (ja) * | 2011-04-20 | 2012-11-15 | Kyocera Corp | 半導体層の製造方法および光電変換装置の製造方法 |
JP2013122955A (ja) * | 2011-12-09 | 2013-06-20 | Sharp Corp | 化合物半導体層およびその製造方法、ならびに化合物薄膜太陽電池およびその製造方法 |
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