JPWO2017056370A1 - 太陽電池セルおよび太陽電池セルの製造方法 - Google Patents
太陽電池セルおよび太陽電池セルの製造方法 Download PDFInfo
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- 238000000034 method Methods 0.000 title claims description 26
- 238000004519 manufacturing process Methods 0.000 title claims description 15
- 239000004065 semiconductor Substances 0.000 claims abstract description 89
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 238000007747 plating Methods 0.000 claims description 121
- 238000010030 laminating Methods 0.000 claims description 6
- 239000010410 layer Substances 0.000 description 291
- 239000000853 adhesive Substances 0.000 description 12
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- 239000002184 metal Substances 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 10
- 239000011241 protective layer Substances 0.000 description 10
- 229910021417 amorphous silicon Inorganic materials 0.000 description 9
- 238000005229 chemical vapour deposition Methods 0.000 description 9
- 230000001681 protective effect Effects 0.000 description 9
- 229910052581 Si3N4 Inorganic materials 0.000 description 8
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 229920005989 resin Polymers 0.000 description 7
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- 238000007789 sealing Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000009713 electroplating Methods 0.000 description 5
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 229910052814 silicon oxide Inorganic materials 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
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- 238000000926 separation method Methods 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000002019 doping agent Substances 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 2
- 229920002037 poly(vinyl butyral) polymer Polymers 0.000 description 2
- 238000009751 slip forming Methods 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000010936 titanium Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
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- 229920001577 copolymer Polymers 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
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- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
- 230000007261 regionalization Effects 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Abstract
Description
本発明を具体的に説明する前に、概要を述べる。本発明の実施例1は、光が入射する受光面に対向する裏面に、互いに間挿し合っている一対の櫛歯状の電極が配置される裏面接合型の太陽電池セルに関する。前述のごとく、これらの電極をめっき法にて生成する場合、外周部において中央部よりも電流が集中するので、外周部のめっき層が中央部のめっき層よりも厚くなる。このような太陽電池セルの面内におけるめっき層の厚さの違いは、応力の面内分布をもたらし、太陽電池セルに反りが発生する。これに対応するために、本実施例において、外周部のバスバー電極が、連続的なシード層上に離散的なめっき層を配置することによって形成され、中央部のフィンガー電極が、連続的なシード層上に連続的なめっき層を配置することによって形成される。以下、図面を参照しながら、本実施例を詳細に説明する。なお、図面の説明において同一の要素には同一の符号を付し、重複する説明を適宜省略する。
次に、実施例2を説明する。実施例2は、実施例1と同様に、裏面接合型の太陽電池セルであり、その反りを低減するために応力の面内分布を低減することを目的とする。実施例1において、中央部のフィンガー電極におけるめっき層を長尺方向に連続的に形成し、外周部のバスバー電極におけるめっき層を長尺方向に離散的に形成している。一方、実施例2では、外周部のバスバー電極におけるめっき層の構成がこれまでとは異なる。実施例2に係る太陽電池モジュール100の構成は、図1と同様であり、太陽電池セル10の裏面側の構成は、図2と同様である。ここでは、実施例1との際を中心に説明する。
次に、実施例3を説明する。実施例3は、これまでと同様に、裏面接合型の太陽電池セルであり、その反りを低減するために応力の面内分布を低減することを目的とする。これまでは、バスバー電極におけるめっき層の量を減少させるための絶縁層として、例えば、窒化シリコンを使用している。一方、実施例3では、絶縁層としてレジストを使用し、最終的に溶剤などでレジストを除去する。実施例3に係る太陽電池モジュール100の構成は、図1と同様であり、太陽電池セル10の裏面側の構成は、図2と同様である。ここでは、実施例1との際を中心に説明する。
Claims (7)
- 第1領域および第2領域を有する半導体基板と、
前記第1領域および前記第2領域を含む前記半導体基板の主面上に配置されるシード層と、
前記第1領域の前記シード層の上において離散的に配置され、前記第2領域の前記シード層の上において配置されない絶縁層と、
前記第1領域において離散的に配置される前記絶縁層の間において前記シード層に接続され、前記第2領域の前記シード層に接続されるめっき層と、
を備えることを特徴とする太陽電池セル。 - 前記第2領域の前記半導体基板の主面上において、第1方向に延びる複数のフィンガー電極と、
前記第1領域の前記半導体基板の主面上において、前記複数のフィンガー電極のそれぞれの一端側に接続され、前記第1方向に対して垂直な第2方向に延びるバスバー電極と、をさらに備える、請求項1に記載の太陽電池セル。 - 前記めっき層は、前記絶縁層から離間した位置において接続されることによって一体的に形成されることを特徴とする請求項2に記載の太陽電池セル。
- 半導体基板と、
前記半導体基板の主面上において、第1方向に延びる複数のフィンガー電極と、
前記複数のフィンガー電極のそれぞれの一端側に接続され、前記第1方向に対して垂直な第2方向に延びるバスバー電極とを備え、
前記バスバー電極は、前記第1方向に延びる複数の空洞部を備えることを特徴とする太陽電池セル。 - 第1領域および第2領域を有する半導体基板の主面上にシード層を積層するとともに、前記第1領域の前記シード層上に絶縁層を積層するステップと、
前記第1領域の前記絶縁層を離散的に除去するステップと、
前記第1領域の前記絶縁層を離散的に除去することによって、前記シード層が露出した部分にめっき層を形成するとともに、前記第2領域の前記シード層上にめっき層を形成するステップと、
を備えることを特徴とする太陽電池セルの製造方法。 - 前記めっき層を形成するステップは、前記半導体基板の主面上から離れる方向に前記めっき層を形成し、前記絶縁層の主面上において隣接するめっき層が接触してから、めっき層の形成を停止することを特徴とする請求項5に記載の太陽電池セルの製造方法。
- 前記めっき層の接触によって一体化してから、前記絶縁層を除去するステップをさらに備えることを特徴とする請求項6に記載の太陽電池セルの製造方法。
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Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2013046376A1 (ja) * | 2011-09-28 | 2013-04-04 | 三洋電機株式会社 | 太陽電池 |
US20140158180A1 (en) * | 2011-08-31 | 2014-06-12 | Sanyo Electric Co., Ltd. | Solar module |
WO2014185537A1 (ja) * | 2013-05-17 | 2014-11-20 | 株式会社カネカ | 太陽電池およびその製造方法、ならびに太陽電池モジュール |
WO2014192739A1 (ja) * | 2013-05-29 | 2014-12-04 | 株式会社カネカ | 太陽電池およびその製造方法、ならびに太陽電池モジュールおよびその製造方法 |
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