JP5734512B2 - 光電変換装置およびその製造方法、光電変換モジュール - Google Patents
光電変換装置およびその製造方法、光電変換モジュール Download PDFInfo
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- 238000006243 chemical reaction Methods 0.000 title claims description 223
- 238000004519 manufacturing process Methods 0.000 title claims description 47
- 239000004065 semiconductor Substances 0.000 claims description 499
- 239000000758 substrate Substances 0.000 claims description 196
- 239000012535 impurity Substances 0.000 claims description 100
- 238000000034 method Methods 0.000 claims description 54
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 11
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 11
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 11
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- 239000010408 film Substances 0.000 description 215
- 229910021419 crystalline silicon Inorganic materials 0.000 description 147
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- 229910052698 phosphorus Inorganic materials 0.000 description 58
- 239000011574 phosphorus Substances 0.000 description 58
- 238000009792 diffusion process Methods 0.000 description 43
- 229910021417 amorphous silicon Inorganic materials 0.000 description 25
- 238000005530 etching Methods 0.000 description 25
- 229910021424 microcrystalline silicon Inorganic materials 0.000 description 20
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 18
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 17
- 229910052796 boron Inorganic materials 0.000 description 17
- 230000015572 biosynthetic process Effects 0.000 description 13
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 9
- 229910003437 indium oxide Inorganic materials 0.000 description 9
- PJXISJQVUVHSOJ-UHFFFAOYSA-N indium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[In+3].[In+3] PJXISJQVUVHSOJ-UHFFFAOYSA-N 0.000 description 9
- 239000011787 zinc oxide Substances 0.000 description 9
- 238000005229 chemical vapour deposition Methods 0.000 description 8
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- 230000001681 protective effect Effects 0.000 description 8
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 6
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- 239000010409 thin film Substances 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 3
- 230000002378 acidificating effect Effects 0.000 description 3
- 229910021529 ammonia Inorganic materials 0.000 description 3
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- IXCSERBJSXMMFS-UHFFFAOYSA-N hcl hcl Chemical compound Cl.Cl IXCSERBJSXMMFS-UHFFFAOYSA-N 0.000 description 3
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 3
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- QPJSUIGXIBEQAC-UHFFFAOYSA-N n-(2,4-dichloro-5-propan-2-yloxyphenyl)acetamide Chemical compound CC(C)OC1=CC(NC(C)=O)=C(Cl)C=C1Cl QPJSUIGXIBEQAC-UHFFFAOYSA-N 0.000 description 3
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 3
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- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 2
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Description
図1−1は、本発明の実施の形態1にかかる光電変換装置1を受光面と反対側の裏面側から見た概略構成を示す斜視図である。図1−2は、光電変換装置1の裏面側の一部を拡大して示す平面図であり、図1−1の領域Bを拡大した平面図である。図1−3は、光電変換装置1の概略構成を示す断面図であり、図1−2のC−C’線に沿った断面図である。図1−1〜図1−3に示すように、光電変換装置1は、n型結晶性珪素基板2の受光面と反対側の裏面側に、ボロン(B)をドープしたp型半導体層10と透明電極12と櫛形状に細線化された集電極3とがこの順で形成され、またリン(P)をドープしたn型半導体層11と透明電極13と櫛形状に細線化された集電極4とがこの順で形成されている。
図5−1は、本発明の実施の形態2にかかる光電変換装置101を受光面と反対側の裏面側から見た概略構成を示す斜視図である。図5−2は、光電変換装置101の裏面側の一部を拡大して示す平面図であり、図5−1の領域Gを拡大した平面図である。図5−3は、光電変換装置101の概略構成を示す断面図であり、図5−2のH−H’線に沿った断面図である。図5−1〜図5−3に示すように、光電変換装置101は、n型結晶性珪素基板102の受光面と反対側の裏面側に、ボロン(B)をドープしたp型半導体層110と透明電極112と櫛形状に細線化された集電極103とがこの順で形成され、またリン(P)をドープしたn型半導体層111と透明電極113と櫛形状に細線化された集電極104とがこの順で形成されている。
図8−1は、本発明の実施の形態3にかかる光電変換装置201を受光面と反対側の裏面側から見た概略構成を示す斜視図である。図8−2は、光電変換装置201の裏面側の一部を拡大して示す平面図であり、図8−1の領域Pを拡大した平面図である。図8−3は、光電変換装置201の概略構成を示す断面図であり、図8−2のQ−Q’線に沿った断面図である。図8−1〜図8−3に示すように、光電変換装置201は、n型結晶性珪素基板202の受光面と反対側の裏面側に、ボロン(B)をドープしたp型半導体層210と透明電極212と櫛形状に細線化された集電極203とがこの順で形成され、またリン(P)をドープしたn型半導体層211と透明電極213と櫛形状に細線化された集電極204とがこの順で形成されている。
Claims (16)
- 第1導電型の半導体基板の受光面と反対側の裏面に、第1導電型の第1半導体層および第2導電型の第2半導体層と、前記第1半導体層上に形成された第1電極と、前記第2半導体層上に形成された第2電極とを備え、
前記半導体基板の受光面側の表面に、第1導電型の半導体領域を備え、
前記半導体領域は、前記半導体基板を介して前記第1半導体層に対向する第1領域と、前記半導体基板を介して前記第2半導体層に対向する第2領域と、において平均不純物濃度が異なること、
を特徴とする光電変換装置。 - 前記第1領域と前記第2領域とが略同等の厚みを有するとともに前記第1領域の平均不純物濃度が、前記第2領域の平均不純物濃度より低いこと、
を特徴とする請求項1に記載の光電変換装置。 - 前記第2領域が、前記第1領域と同等の平均不純物濃度を有して前記半導体領域の厚み方向において前記裏面側に配置された第1層と、前記第1層よりも平均不純物濃度が高く前記半導体領域の厚み方向において前記受光面側に配置された第2層と、が積層されてなること、
を特徴とする請求項2に記載の光電変換装置。 - 前記第1領域の不純物進入深さが、前記第2領域の不純物進入深さより浅いこと、
を特徴とする請求項1に記載の光電変換装置。 - 前記第1半導体層および前記第2半導体層と、前記半導体基板との間に、不純物濃度が前記第1半導体層および前記第2半導体層より低い第3半導体層を有すること、
を特徴とする請求項1〜4のいずれか1つに記載の光電変換装置。 - 前記半導体基板の受光面側の表面に第1導電型の第4半導体層が形成されていること、
を特徴とする請求項1〜5のいずれか1つに記載の光電変換装置。 - 前記半導体基板の受光面側の表面に誘電体層が形成されていること、
を特徴とする請求項1〜5のいずれか1つに記載の光電変換装置。 - 前記誘電体層が酸化珪素または窒化珪素からなること、
を特徴とする請求項7に記載の光電変換装置。 - 前記第1半導体層と前記第2半導体層とが前記半導体基板の裏面において交互に配列されていること、
を特徴とする請求項1〜8のいずれか1つに記載の光電変換装置。 - 前記第1半導体層と前記第1電極との間および前記第2半導体層と前記第2電極との間に透明電極を有すること、
を特徴とする請求項1〜9のいずれか1つに記載の光電変換装置。 - 第1導電型の半導体基板の受光面側の表面に、第1導電型の半導体領域を形成する第1工程と、
前記半導体基板の受光面と反対側の裏面に第1導電型の第1半導体層を形成する第2工程と、
前記半導体基板の受光面と反対側の裏面に第2導電型の第2半導体層を形成する第3工程と、
前記第1半導体層上に第1電極を形成し、前記第2半導体層上に第2電極を形成する第4工程と、
を含み
前記第1工程では、前記半導体基板を介して前記第1半導体層に対向する第1領域と、前記半導体基板を介して前記第2半導体層に対向する第2領域と、において平均不純物濃度を異ならせること、
を特徴とする光電変換装置の製造方法。 - 前記第1工程では、前記第1領域と前記第2領域とを略同等の厚みとするとともに前記第1領域の平均不純物濃度を前記第2領域の平均不純物濃度より低くすること、
を特徴とする請求項11に記載の光電変換装置の製造方法。 - 前記第2領域が、前記第1領域と同等の平均不純物濃度を有して前記半導体領域の厚み方向において前記裏面側に配置された第1層と、前記第1層よりも平均不純物濃度が高く前記半導体領域の厚み方向において前記受光面側に配置された第2層と、が積層されて形成されること、
を特徴とする請求項12に記載の光電変換装置の製造方法。 - 前記第1工程では、前記第1領域の不純物進入深さを、前記第2領域の不純物進入深さより浅くすること、
を特徴とする請求項11に記載の光電変換装置の製造方法。 - 前記第2工程および前記第3工程では、前記第1半導体層と前記第2半導体層とを前記半導体基板の裏面において交互に配列すること、
を特徴とする請求項11〜14のいずれか1つに記載の光電変換装置の製造方法。 - 請求項1〜10のいずれか1つに記載の光電変換装置の少なくとも2つ以上が電気的に直列または並列に接続されてなること、
を特徴とする光電変換モジュール。
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US20150380581A1 (en) * | 2014-06-27 | 2015-12-31 | Michael C. Johnson | Passivation of light-receiving surfaces of solar cells with crystalline silicon |
NL2013722B1 (en) | 2014-10-31 | 2016-10-04 | Univ Delft Tech | Back side contacted wafer-based solar cells with in-situ doped crystallized thin-film silicon and/or silicon oxide regions. |
WO2016072415A1 (ja) * | 2014-11-07 | 2016-05-12 | シャープ株式会社 | 光電変換素子 |
WO2017113299A1 (zh) * | 2015-12-31 | 2017-07-06 | 中海阳能源集团股份有限公司 | 一种背电极异质结太阳能电池及其制备方法 |
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JP6953690B2 (ja) * | 2016-08-10 | 2021-10-27 | 株式会社ジェイテクト | 解析システム |
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