JP5524194B2 - トレンチ処理およびポリシリコンドーピング領域を持つ裏面コンタクト型太陽電池用の構造 - Google Patents
トレンチ処理およびポリシリコンドーピング領域を持つ裏面コンタクト型太陽電池用の構造 Download PDFInfo
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- JP5524194B2 JP5524194B2 JP2011513521A JP2011513521A JP5524194B2 JP 5524194 B2 JP5524194 B2 JP 5524194B2 JP 2011513521 A JP2011513521 A JP 2011513521A JP 2011513521 A JP2011513521 A JP 2011513521A JP 5524194 B2 JP5524194 B2 JP 5524194B2
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- 229910021420 polycrystalline silicon Inorganic materials 0.000 title claims description 58
- 229920005591 polysilicon Polymers 0.000 title claims description 58
- 238000012545 processing Methods 0.000 title description 6
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 54
- 239000000758 substrate Substances 0.000 claims description 29
- 239000000377 silicon dioxide Substances 0.000 claims description 27
- 235000012239 silicon dioxide Nutrition 0.000 claims description 27
- 229910052751 metal Inorganic materials 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 23
- 238000002161 passivation Methods 0.000 claims description 20
- 239000002019 doping agent Substances 0.000 claims description 19
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- 238000009792 diffusion process Methods 0.000 claims description 11
- 239000010410 layer Substances 0.000 description 83
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- 229910052581 Si3N4 Inorganic materials 0.000 description 28
- 230000008569 process Effects 0.000 description 28
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 28
- 230000015556 catabolic process Effects 0.000 description 25
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- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
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- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 3
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- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 238000001505 atmospheric-pressure chemical vapour deposition Methods 0.000 description 2
- 230000006399 behavior Effects 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
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- 239000011574 phosphorus Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 2
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- 238000007788 roughening Methods 0.000 description 2
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- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 1
- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 1
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Description
[項目7]
太陽電池を製造する方法であって、
N型シリコンウェハを含む太陽電池基板の上に第1の誘電体層を形成する段階と、
前記第1の誘電体層の上方に配置されるようにP型ドーピング領域およびN型ドーピング領域を、前記太陽電池の正面の反対側の面であり、前記正面は、通常動作時に太陽の方を向く面である前記太陽電池基板の裏面に形成する段階と、
所与の箇所において前記P型ドーピング領域および前記N型ドーピング領域を互いから物理的に分離して、他の箇所においては前記P型ドーピング領域および前記N型ドーピング領域を互いに接触させる段階と、
前記P型ドーピング領域および前記N型ドーピング領域の上方に第2の誘電体層を成膜する段階と
を備える方法。
[項目8]
断続的なトレンチによって、前記P型ドーピング領域および前記N型ドーピング領域を互いから物理的に分離する項目7に記載の方法。
[項目9]
前記断続的なトレンチの表面を不規則に粗面化する段階をさらに備える項目8に記載の方法。
[項目10]
前記第2の誘電体層は、窒化シリコンを含む項目7に記載の方法。
[項目11]
前記太陽電池基板の前記裏面において、前記P型ドーピング領域に第1の金属コンタクトフィンガー部を電気接合する段階と、
前記太陽電池基板の前記裏面において、前記N型ドーピング領域に第2の金属コンタクトフィンガー部を電気接合する段階と
をさらに備える項目7に記載の方法。
[項目12]
前記P型ドーピング領域は、前記第1の誘電体層の上方に成膜される前にP型ドーパントで事前にドーピングされていたポリシリコンを含み、前記N型ドーピング領域は、前記第1の誘電体層の上方に形成される前にN型ドーパントで事前にドーピングされていたポリシリコンを含む項目7に記載の方法。
[項目13]
前記P型ドーピング領域を形成する段階は、
ドーパントソースからポリシリコン層へとドーパントを拡散させる段階
を有し、
前記ドーパントソースは、前記ポリシリコン層の上方に形成される材料層である項目7に記載の方法。
[項目14]
前記ドーパントソースは、P型ドーピングニ酸化シリコン層を含む項目13に記載の方法。
[項目20]
前記断続的なトレンチ構造の表面に形成されているパッシベーション層をさらに備える太陽電池。
Claims (14)
- 通常動作時に太陽の方を向く正面および前記正面の反対側の裏面を有するシリコン基板と、
ある箇所では物理的に互いから分離しており、別の箇所では互いに接触して隣接接合を形成しており、ポリシリコンを有するP型ドーピング領域およびN型ドーピング領域と、
前記P型ドーピング領域および前記N型ドーピング領域それぞれの下方であって前記基板の上方に形成されている第1の誘電体層と、
前記P型ドーピング領域および前記N型ドーピング領域の上方に形成されている第2の誘電体層と
を備える太陽電池構造。 - 前記第1の誘電体層は、前記シリコン基板の表面上に5〜40オングストロームの範囲内の厚みで形成される二酸化シリコンを有する請求項1に記載の太陽電池構造。
- 前記P型ドーピング領域および前記N型ドーピング領域は、断続的なトレンチ構造によって互いから物理的に分離されている請求項1または2に記載の太陽電池構造。
- 前記トレンチ構造は、不規則に粗面化した表面を有する請求項3に記載の太陽電池構造。
- 前記第2の誘電体層と前記基板との間に形成されているパッシベーション層をさらに備える請求項1から4の何れか1項に記載の太陽電池構造。
- 前記トレンチ構造の下方であって前記基板の内部に形成されており、N型ドーパントでドーピングされている拡散パッシベーション領域をさらに備える請求項3または4に記載の太陽電池構造。
- 前記第2の誘電体層を貫通して前記P型ドーピング領域および前記N型ドーピング領域に電気的に結合されている、インターデジット式の複数の金属コンタクトフィンガー部をさらに備える請求項1から6の何れか1項に記載の太陽電池構造。
- 前記P型ドーピング領域および前記N型ドーピング領域は、複数箇所で互いに接触して隣接接合を形成している請求項1から7の何れか1項に記載の太陽電池構造。
- シリコン基板の裏面上に形成されており、ポリシリコンを有し、それぞれが誘電体層の上方に形成されているP型ドーピング領域およびN型ドーピング領域と、
前記P型ドーピング領域および前記N型ドーピング領域を互いから分離しており、第1の箇所において前記P型ドーピング領域および前記N型ドーピング領域を互いに接触させている断続的なトレンチ構造と
を備える太陽電池。 - 前記シリコン基板は、N型シリコン基板を含む請求項9に記載の太陽電池。
- 前記P型ドーピング領域および前記N型ドーピング領域が互いに接触している第2の箇所をさらに備える請求項9または10に記載の太陽電池。
- 前記第1の箇所および前記第2の箇所は、局所的動作温度が同一である同じ領域内にある請求項11に記載の太陽電池。
- 前記第1の箇所は、前記太陽電池において前記P型ドーピング領域および前記N型ドーピング領域が互いに接触する唯一の箇所である請求項9または10に記載の太陽電池。
- 前記トレンチ構造は、不規則に粗面化した表面を有する請求項9から13の何れか1項に記載の太陽電池。
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US12/392,923 US7851698B2 (en) | 2008-06-12 | 2009-02-25 | Trench process and structure for backside contact solar cells with polysilicon doped regions |
PCT/US2009/042135 WO2009151809A1 (en) | 2008-06-12 | 2009-04-29 | Trench process and structure for backside contact solar cells with polysilicon doped regions |
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JP2011513520A Active JP5625167B2 (ja) | 2008-06-12 | 2009-04-29 | ポリシリコンドープ領域を有するバックコンタクト型太陽電池のトレンチ構造 |
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KR (2) | KR101492683B1 (ja) |
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