JP5789716B2 - 太陽電池基板とその製造方法及びこれを用いた太陽電池 - Google Patents
太陽電池基板とその製造方法及びこれを用いた太陽電池 Download PDFInfo
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- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
- H01L31/036—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes
- H01L31/0392—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including thin films deposited on metallic or insulating substrates ; characterised by specific substrate materials or substrate features or by the presence of intermediate layers, e.g. barrier layers, on the substrate
- H01L31/03926—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including thin films deposited on metallic or insulating substrates ; characterised by specific substrate materials or substrate features or by the presence of intermediate layers, e.g. barrier layers, on the substrate comprising a flexible substrate
- H01L31/03928—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their crystalline structure or particular orientation of the crystalline planes including thin films deposited on metallic or insulating substrates ; characterised by specific substrate materials or substrate features or by the presence of intermediate layers, e.g. barrier layers, on the substrate comprising a flexible substrate including AIBIIICVI compound, e.g. CIS, CIGS deposited on metal or polymer foils
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- H01L31/02—Details
- H01L31/0216—Coatings
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- H01L31/02167—Coatings for devices characterised by at least one potential jump barrier or surface barrier for solar cells
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- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
- H01L31/06—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier
- H01L31/072—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier the potential barriers being only of the PN heterojunction type
- H01L31/0749—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices characterised by at least one potential-jump barrier or surface barrier the potential barriers being only of the PN heterojunction type including a AIBIIICVI compound, e.g. CdS/CulnSe2 [CIS] heterojunction solar cells
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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
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Description
多層金属拡散防止膜を有する太陽電池基板の拡散防止効果を確認するために、ステンレス鋼(STS 430)を下部基板として、上記ステンレス鋼下部基板上にCrを100nm蒸着して拡散防止膜を形成した(比較例1)。また、上記と同じ条件下のステンレス鋼下部基板上にMoを10nm蒸着し、その上にCrを100nm蒸着して、Mo/Crの二層金属拡散防止膜を形成した(発明例1)。
多層構造の拡散防止効果を確認するために、ステンレス鋼(STS 430)を基板として、上記ステンレス鋼基板上にSiO2を1000nm蒸着して拡散防止膜を形成した(比較例2)。また、上記と同じ条件下のステンレス鋼基板上にMoを60nm蒸着し、その上にSiO2を1000nm蒸着して、SiO2/Moの二重層からなる拡散防止膜を形成した(発明例2)。
酸化物層が含まれた多層構造の拡散防止効果を確認するために、酸化物層の形成の有無による太陽電池の光変換効率を測定した。通常のガラス(ソーダ石灰ガラス)基板を用いた(比較例3)。また、ステンレス鋼(STS 430)を基板として、上記ステンレス鋼基板上にSiO2を1000nm蒸着して拡散防止膜を形成した(比較例4)。また、上記と同じ条件下のステンレス鋼基板上にMoを20nm蒸着し、その上にSiO2を500nm蒸着して、SiO2/Moの二重層からなる拡散防止膜を形成した(発明例3)。また、上記と同じ条件下のステンレス鋼基板上にMoを100nm蒸着し、その上にSiO2を200nm蒸着した後、再度Moを100nm蒸着し、その上にSiO2を200nm蒸着して、SiO2/Mo/SiO2/Moの四重層からなる拡散防止膜を形成した(発明例4)。
20 拡散防止膜
21、21’、22、23 拡散防止金属層
30 下部電極
40 酸化物層
50 光吸収層
A Na(ナトリウム)
Claims (18)
- 下部基板と、
前記下部基板の上部に形成される下部電極と、
前記下部基板と下部電極との間に一つ又は二つ以上の金属層からなる金属拡散防止膜
とを含み、
前記金属拡散防止膜が二つ以上の金属層からなる場合に、相互に接する金属層は異種の金属からなり、前記二つ以上の金属層の間に酸化物層を含む、
太陽電池基板。 - 前記拡散防止膜のうち一つ又は二つ以上の金属層はNaを含む、請求項1に記載の太陽電池基板。
- 前記Naは下部電極に接する金属層に含まれている、請求項2に記載の太陽電池基板。
- 前記Naの含量は0.0005〜0.1重量%である、請求項2に記載の太陽電池基板。
- 前記酸化物層はSiOX、SiNX及びAl2O3のいずれか一つから形成される、請求項1に記載の太陽電池基板。
- 前記二つ以上の金属層は互いに異なる金属材料からなる、請求項1に記載の太陽電池基板。
- 前記金属はCr、Ti、Ni及びMoのいずれか一つである、請求項1に記載の太陽電池基板。
- 前記拡散防止膜は厚さが100〜500nmであり、前記金属拡散防止膜が二つ以上の金属層からなる場合に各金属層の厚さが10nm以上である、請求項1に記載の太陽電池基板。
- 前記下部基板はガラス、ステンレス鋼、アルミニウムホイル、Fe‐Ni系金属、Fe‐Cu系金属、およびポリイミドからなる群から選択される一種からなる、請求項1に記載の太陽電池基板。
- 下部基板と、前記下部基板の上部に形成される下部電極と、前記下部基板と下部電極との間に一つ又は二つ以上の金属層からなる金属拡散防止膜とを含み、前記金属拡散防止膜が二つ以上の金属層からなる場合に、相互に接する金属層は異種の金属からなり、前記二つ以上の金属層の間に酸化物層を含む太陽電池基板と、
前記太陽電池基板上に形成されたp型光吸収層と、
前記光吸収層上に形成されたn型バッファ層と、
前記バッファ層上に形成された透明窓と、
前記透明窓上に形成された上部電極
とを含む、太陽電池。 - 前記拡散防止膜のうち一つ又は二つ以上の金属層はNaを含む、請求項10に記載の太陽電池。
- 前記酸化物層はSiOX、SiNX及びAl2O3のいずれか一つから形成される、請求項10に記載の太陽電池。
- 前記光吸収層はCIGSを含み、n型半導体としてのバッファ層はCdSを含み、透明窓はZnOを含む、請求項10に記載の太陽電池。
- 電気メッキのための電解液にNa含有金属粒子を分散させる段階と、
前記Na含有金属粒子が分散された電解液を用いて下部基板に電気メッキを行ってNa含有金属層を形成することにより、拡散防止膜を製造する段階
とを含む、太陽電池基板の製造方法。 - 前記Na含有金属粒子は酸化ナトリウム(NaO2)である、請求項14に記載の太陽電池基板の製造方法。
- 前記酸化ナトリウム(NaO2)の粒径は10〜100nmである、請求項15に記載の太陽電池基板の製造方法。
- 前記分散された酸化ナトリウムの粒子濃度は0.1〜100g/lである、請求項15に記載の太陽電池基板の製造方法。
- 前記電気メッキは、メッキされる金属の金属塩を金属イオン濃度が1〜100g/lとなるように溶解させ、Na含有金属粒子が分散されたメッキ浴を50〜60℃に加熱し、電流密度0.1〜100A/dm2の電流をメッキ浴に印加して行われる、請求項14に記載の太陽電池基板の製造方法。
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