JP5091161B2 - 太陽電池素子及び太陽電池素子の製造方法 - Google Patents
太陽電池素子及び太陽電池素子の製造方法 Download PDFInfo
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- 239000011521 glass Substances 0.000 claims description 79
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- 229910052710 silicon Inorganic materials 0.000 claims description 34
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 24
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- 239000004332 silver Substances 0.000 description 20
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- 229910000679 solder Inorganic materials 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 4
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- ILAHWRKJUDSMFH-UHFFFAOYSA-N boron tribromide Chemical compound BrB(Br)Br ILAHWRKJUDSMFH-UHFFFAOYSA-N 0.000 description 4
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- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 3
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 3
- 229910021417 amorphous silicon Inorganic materials 0.000 description 3
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910004205 SiNX Inorganic materials 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
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- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 2
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- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 1
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- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 description 1
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
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- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
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- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 1
- 125000004437 phosphorous atom Chemical group 0.000 description 1
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- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L31/04—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
- H01L31/068—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 homojunction type, e.g. bulk silicon PN homojunction solar cells or thin film polycrystalline silicon PN homojunction solar cells
- H01L31/0682—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 homojunction type, e.g. bulk silicon PN homojunction solar cells or thin film polycrystalline silicon PN homojunction solar cells back-junction, i.e. rearside emitter, solar cells, e.g. interdigitated base-emitter regions back-junction cells
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- H—ELECTRICITY
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- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L31/02—Details
- H01L31/0224—Electrodes
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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
- H01L31/02—Details
- H01L31/0224—Electrodes
- H01L31/022408—Electrodes for devices characterised by at least one potential jump barrier or surface barrier
- H01L31/022425—Electrodes for devices characterised by at least one potential jump barrier or surface barrier for solar cells
- H01L31/022441—Electrode arrangements specially adapted for back-contact solar cells
- H01L31/02245—Electrode arrangements specially adapted for back-contact solar cells for metallisation wrap-through [MWT] type solar cells
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- 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
- H01L31/0352—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 shape or by the shapes, relative sizes or disposition of the semiconductor regions
- H01L31/035272—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 shape or by the shapes, relative sizes or disposition of the semiconductor regions characterised by at least one potential jump barrier or surface barrier
- H01L31/03529—Shape of the potential jump barrier or surface barrier
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- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1804—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof comprising only elements of Group IV of the Periodic System
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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
- Y02E10/547—Monocrystalline silicon PV 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
≪太陽電池素子≫
図1は、本発明の第1の実施の形態に係る太陽電池素子10Aの構造を示す断面模式図である。
次に、上述のような構造を有する太陽電池素子10Aの第一の電極4について、より詳細に説明する。
但し、D:結晶子径
λ:測定X線波長
β:半値幅(ラジアン)
θ:回折角
K:Scherrer定数(0.9)
本実施の形態に係る太陽電池素子10Aの製造方法の一例について説明する。図4は、係る製造方法を実行する場合の太陽電池素子10Aの製造過程を模式的に示す図である。
まず、p型の導電型を呈する半導体基板1を準備する(図4(a))。
次に、半導体基板1の第一の面1Fと第二の面1Sとの間に貫通孔3を形成する(図4(b))。
次に、貫通孔3が形成された半導体基板1の受光面側に、光反射率の低減を効果的に行うための微細な突起(凸部)1bをもつテクスチャ構造1aを形成する(図4(c))。
次に、逆導電型層2を形成する。すなわち、半導体基板1の第一の面1Fに第一逆導電型層2aを形成し、貫通孔3の表面に第二逆導電型層2bを形成し、第二の面1Sに第三逆導電型層2cを形成する(図4(d))。
次に、第一逆導電型層2aの上に、反射防止膜7を形成する(図4(e))。
次に、半導体基板1の第二の面1Sに、高濃度ドープ層6を形成する(図4(f))。
次に、第一の電極4を構成する主電極部4aと導通部4bとを形成する。(図4(g))。
本実施の形態に係る太陽電池素子10Aは、単独で使用することが可能であるが、同じ構造を有する複数の太陽電池素子10Aを隣接配置し、さらに互いを直列に接続してモジュールを構成することもできる。係る場合、隣り合う太陽電池素子10A同士は、一方の太陽電池素子10Aの第二の面1Sに設けられた裏面電極部4cと、他方の太陽電池素子10Aの同じく第二の面1Sに設けられたバスバー部5aとに、配線材を接合することによって互いに接続される。よって、従来の太陽電池モジュールのように、配線材を折り曲げて接続させる必要がないことから、配線材が電極から剥離することが低減される。
図6は、本発明の第2の実施の形態に係る太陽電池素子10Bの構造を示す断面模式図である。本実施の形態に係る太陽電池素子10Bは、第一の電極4の構成が第一の実施の形態に係る太陽電池素子10Aと相違する。よって、太陽電池素子10Aの構成要素と同一の作用効果を奏する構成要素については、同一の符号を付してその説明を省略する。
図8は、本発明の第3の実施の形態に係る太陽電池素子10Cの構造を示す断面模式図である。本実施の形態に係る太陽電池素子10Cは、第1の実施の形態に係る太陽電池素子10Aと同様の構成要素を有するものであるが、貫通孔3の表面が粗面化されてなる(凹凸構造を有してなる)点で太陽電池素子10Aとは相違する。
<絶縁材料層の形成>
図9は、第三逆導電型層2cを形成する代わりに、酸化膜や窒化膜などからなる絶縁材料層8を形成してなる太陽電池素子10Dの断面模式図である。
また、図11は、裏面電極部4cの異なる態様を例示する図である。裏面電極部4cの形状は、図3に示されるような帯状に限定されるものではなく、これに代えて、例えば、図11(a)に示されるように、導通部4bの上にポイント状に形成されてもよい。この場合、図11(a)のY−Y断面である図11(b)に例示するように、それぞれのポイント状の裏面電極部4c同士の間に、絶縁材料層8を形成することが好ましい。これにより、パッシベーション効果を得て太陽電池素子の出力特性を向上させることができる。また、係るポイント状の第1接続部4c同士の間に、高濃度ドープ層6を形成する態様であってもよい。
Claims (20)
- 太陽光を受光する第一の面と、前記第一の面の裏側の第二の面とを含み、前記第一の面と前記第二の面との間を貫通する貫通孔を有するシリコン基板と、
ガラス成分を含んでおり前記シリコン基板の前記第一の面上に形成された主電極部と、前記主電極部と電気的に接続されるとともに前記シリコン基板の前記貫通孔内に形成されており、前記主電極部よりもガラス成分の含有比率が小さい導通部と、を含む第一電極と、
を有する太陽電池素子。 - 前記導通部がガラス成分を有さないことを特徴とする請求項1に記載の太陽電池素子。
- 前記貫通孔の表面が粗面であることを特徴とする請求項1または請求項2に記載の太陽電池素子。
- 前記貫通孔の表面が高さおよび幅が30μm以下の凸部を有することを特徴とする請求項3に記載の太陽電池素子。
- 前記第一電極が、前記シリコン基板の前記第二の面上に形成され前記導通部と接続された裏面電極部をさらに含む、ことを特徴とする請求項1ないし請求項4のいずれかに記載の太陽電池素子。
- 前記第一電極は第一の極性を有し、前記第一の極性と異なる第二の極性を有し、前記シリコン基板の前記第二の面に形成された第二電極をさらに備えることを特徴とする請求項1ないし請求項5のいずれかに記載の太陽電池素子。
- 前記シリコン基板は、前記シリコン基板の前記第一の面と前記貫通孔の表面とに形成されており前記シリコン基板と異なる導電型を有する層をさらに有することを特徴とする請求項1ないし請求項6のいずれかに記載の太陽電池素子。
- 太陽光を受光する第一の面と、前記第一の面の裏側の第二の面とを含み、前記第一の面と前記第二の面との間を貫通する貫通孔を有するシリコン基板と、
ガラス成分を含んでおり前記シリコン基板の前記第一の面上に形成された第一の部分と、前記第一の部分上に形成されており、前記第一の部分よりガラスの含有比率が小さい第二の部分と、前記第二の部分と電気的に接続されているとともに前記貫通孔内に形成されており、前記第一の部分よりガラスの含有比率が小さい第三の部分と、を含む第一電極と、
を有することを特徴とする太陽電池素子。 - 前記シリコン基板は、前記シリコン基板の前記第一の面と前記貫通孔の表面とに形成されており前記シリコン基板と異なる導電型を有する層をさらに有することを特徴とする請求項8に記載の太陽電池素子。
- 前記第一電極の前記第一の部分と、前記第一電極の前記第三の部分とが離間していることを特徴とする請求項8または請求項9に記載の太陽電池素子。
- 前記第一電極の前記第三の部分は、ガラス成分を含有しないことを特徴とする請求項8ないし請求項10のいずれかに記載の太陽電池素子。
- 前記第一電極の前記第二の部分は、ガラス成分を含有しないことを特徴とする請求項8ないし請求項11のいずれかに記載の太陽電池素子。
- 第一の面と第二の面とを含み、貫通孔を有するシリコン基板を準備する工程と、
前記第一の面上に主電極部を有するとともに前記貫通孔内に導通部を有する第一電極を形成する工程であって、
前記シリコン基板の前記第一の面に第一の導電性ペーストを塗布する工程と、
前記シリコン基板の前記貫通孔内に、前記第一の導電性ペーストよりもガラスフリットの含有比率が小さい第二の導電性ペーストを塗布する工程と、
を含む工程と、
を有することを特徴とする太陽電池素子の製造方法。 - 前記第二の導電性ペーストのガラスフリットの含有比率が、前記第一の導電性ペーストのガラスフリットの含有比率の1/5以下であることを特徴とする請求項13に記載の太陽電池素子の製造方法。
- 前記第二の導電性ペーストが、ガラスフリットを含有しないことを特徴とする請求項14に記載の太陽電池素子の製造方法。
- 前記第二の導電性ペーストを塗布後、前記第二の導電性ペーストを前記シリコン基板の前記貫通孔内にさらに塗布する工程を有することを特徴とする請求項15に記載の太陽電池素子の製造方法。
- 前記第一の導電性ペーストと前記第二の導電性ペーストとを同時に焼成する工程をさらに有することを特徴とする請求項13ないし請求項16のいずれかに記載の太陽電池素子の製造方法。
- 前記第一の導電性ペーストを塗布することによって形成された塗布膜の上に、第三の導電性ペーストを塗布する工程をさらに有することを特徴とする請求項13ないし請求項17のいずれかに記載の太陽電池素子の製造方法。
- 前記第一の導電性ペーストと前記第三の導電性ペーストとを同時に焼成する工程をさらに有することを特徴とする請求項18に記載の太陽電池素子の製造方法。
- 前記第二の導電性ペーストを塗布する工程において、前記第二の導電性ペーストを前記シリコン基板の前記貫通孔の表面と、前記第一の導電性ペースト上とに同時に塗布することを特徴とする請求項13または請求項14に記載の太陽電池素子の製造方法。
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KR102483918B1 (ko) | 2020-08-26 | 2022-12-30 | 성균관대학교산학협력단 | 개구부를 포함하는 양면 수광형 실리콘 탠덤형 태양 전지의 제조 방법 |
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