JP5379767B2 - 太陽電池セルおよびその製造方法 - Google Patents
太陽電池セルおよびその製造方法 Download PDFInfo
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- 238000009792 diffusion process Methods 0.000 claims description 204
- 239000000758 substrate Substances 0.000 claims description 111
- 239000013078 crystal Substances 0.000 claims description 36
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 34
- 229910052710 silicon Inorganic materials 0.000 claims description 34
- 239000010703 silicon Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 29
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 28
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 claims description 27
- 229910052796 boron Inorganic materials 0.000 claims description 27
- 239000007864 aqueous solution Substances 0.000 claims description 25
- 238000006243 chemical reaction Methods 0.000 claims description 22
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 14
- 239000011574 phosphorus Substances 0.000 claims description 14
- 229910052698 phosphorus Inorganic materials 0.000 claims description 14
- 238000007650 screen-printing Methods 0.000 claims description 9
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- 239000010410 layer Substances 0.000 description 78
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- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 27
- 239000004065 semiconductor Substances 0.000 description 15
- 239000003795 chemical substances by application Substances 0.000 description 12
- ILAHWRKJUDSMFH-UHFFFAOYSA-N boron tribromide Chemical compound BrB(Br)Br ILAHWRKJUDSMFH-UHFFFAOYSA-N 0.000 description 10
- 238000001035 drying Methods 0.000 description 10
- 239000007789 gas Substances 0.000 description 9
- 230000008569 process Effects 0.000 description 9
- XHXFXVLFKHQFAL-UHFFFAOYSA-N phosphoryl trichloride Chemical compound ClP(Cl)(Cl)=O XHXFXVLFKHQFAL-UHFFFAOYSA-N 0.000 description 8
- 239000012298 atmosphere Substances 0.000 description 7
- 239000005368 silicate glass Substances 0.000 description 7
- 238000007602 hot air drying Methods 0.000 description 6
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 150000004767 nitrides Chemical class 0.000 description 4
- 239000005365 phosphate glass Substances 0.000 description 4
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
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- 229910015845 BBr3 Inorganic materials 0.000 description 2
- 229910052582 BN Inorganic materials 0.000 description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
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- 229910017604 nitric acid Inorganic materials 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 2
- 238000007639 printing Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 229910004205 SiNX Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229910052810 boron oxide Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
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- 230000003685 thermal hair damage Effects 0.000 description 1
- 239000010409 thin film Substances 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
- 239000004408 titanium dioxide Substances 0.000 description 1
- FAQYAMRNWDIXMY-UHFFFAOYSA-N trichloroborane Chemical compound ClB(Cl)Cl FAQYAMRNWDIXMY-UHFFFAOYSA-N 0.000 description 1
- 238000001771 vacuum deposition Methods 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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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
- H01L31/04—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 potential barriers
- 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 potential barriers 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
- H01L31/0684—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 potential barriers 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 double emitter cells, e.g. bifacial 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 potential barriers
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E10/547—Monocrystalline silicon PV cells
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Description
実施例1として、CZ法により作製された結晶性方位(100)、15.6cm角、厚さが200μmで、比抵抗が2.8Ω・cmのシリコン単結晶基板であるn型の半導体基板を用意し、10wt%の水酸化ナトリウム水溶液に半導体基板を浸漬させ、ダメージ層を取り除いた。そして、基板を2wt%の水酸化ナトリウム水溶液に浸漬させ、基板の表面全体にテクスチャ構造を形成した。そして基板の洗浄を行った。
7…レジスト膜
10…表面
15…高濃度p型拡散領域
16…低濃度p型拡散領域
20…裏面
25…高濃度n型拡散領域
26…低濃度n型拡散領域
26’…全面均一なn型拡散層
30…酸化膜
35…反射防止膜
40…第1電極層
42…第2電極層
45…電極
A…太陽電池セル
W…半導体基板
Claims (13)
- n型のシリコン単結晶基板と、
前記シリコン単結晶基板の一方の面に形成されたp型拡散層と、
前記シリコン単結晶基板の他方の面に形成されたn型拡散層と、
前記p型拡散層に部分的に形成される1または複数の受光面グリッド電極およびバスバー電極と、
前記n型拡散層に部分的に形成される1または複数の受光面グリッド電極およびバスバー電極と、から構成される太陽電池セルであって、
前記p型拡散層には、複数の高濃度p型拡散領域と、それら高濃度p型拡散領域間に位置する低濃度p型拡散領域が形成され、
前記n型拡散層には、複数の高濃度n型拡散領域と、それら高濃度n型拡散領域間に位置する低濃度n型拡散領域が形成され、
前記受光面グリッド電極およびバスバー電極は、前記高濃度p型拡散領域および高濃度n型拡散領域に隣接して形成され、
前記シリコン単結晶基板の比抵抗は1〜14Ω・cmであり、
前記高濃度p型拡散領域および前記低濃度p型拡散領域はボロン拡散によって形成され、前記高濃度p型拡散領域のシート抵抗は20〜100Ω/□であり、かつ、前記低濃度p型拡散領域のシート抵抗は30〜150Ω/□であり、
前記高濃度n型拡散領域および前記低濃度n型拡散領域はリン拡散によって形成され、前記高濃度n型拡散領域のシート抵抗は20〜100Ω/□であり、かつ、前記低濃度n型拡散領域のシート抵抗は30〜150Ω/□であり、
p型拡散層が形成されている一方の面における発電能力が変換効率18%以上であり、
n型拡散層が形成されている他方の面における変換効率がp型拡散層が形成されている一方の面における変換効率の93%以上である、太陽電池セル。 - 前記p型拡散層およびn型拡散層はパッシベーション用絶縁膜で覆われている、請求項1に記載の太陽電池セル。
- 前記p型拡散層およびn型拡散層は反射防止膜で覆われている、請求項1又は2に記載の太陽電池セル。
- 前記受光面グリッド電極および前記バスバー電極は第1電極層と第2電極層を二層重ねて形成される、請求項1〜3のいずれかに記載の太陽電池セル。
- 前記第1電極層は、前記第2電極層に比べシリコン単結晶基板との接触抵抗が低く、且つシリコン単結晶基板との接着強度が強い、請求項4に記載の太陽電池セル。
- 前記第2電極層は、前記第1電極層に比べ体積固有抵抗が低い、請求項4または5に記載の太陽電池セル。
- 前記受光面グリッド電極および前記バスバー電極は、スクリーン印刷によって形成される、請求項1〜6のいずれかに記載の太陽電池セル。
- n型のシリコン単結晶基板の一方の面に複数の高濃度p型拡散領域と、それら高濃度p型拡散領域間に位置する低濃度p型拡散領域からなるp型拡散層を形成させる工程と、
n型のシリコン単結晶基板の他方の面に複数の高濃度n型拡散領域と、それら高濃度n型拡散領域間に位置する低濃度n型拡散領域からなるn型拡散層を形成させる工程と、
前記高濃度p型拡散領域および高濃度n型拡散領域に隣接する受光面グリッド電極およびバスバー電極を形成させる工程と、を備え、
前記シリコン単結晶基板の比抵抗は1〜14Ω・cmであり、
前記高濃度p型拡散領域のシート抵抗は20〜100Ω/□であり、かつ、前記低濃度p型拡散領域のシート抵抗は30〜150Ω/□であり、
前記高濃度n型拡散領域のシート抵抗は20〜100Ω/□であり、かつ、前記低濃度n型拡散領域のシート抵抗は30〜150Ω/□である、太陽電池セルの製造方法。 - 前記n型拡散層を形成させる工程において、p型拡散層の表面に形成されたフッ酸水溶液で除去可能な膜をバリア膜として使用する、請求項8に記載の太陽電池セルの製造方法。
- 前記受光面グリッド電極および前記バスバー電極を形成させる工程において、前記受光面グリッド電極および前記バスバー電極は第1電極層と第2電極層を二層重ねて形成される、請求項8又は9に記載の太陽電池セルの製造方法。
- 前記第1電極層は、前記第2電極層に比べシリコン単結晶基板との接触抵抗が低く、且つシリコン単結晶基板との接着強度が強い、請求項10に記載の太陽電池セルの製造方法。
- 前記第2電極層は、前記第1電極層に比べ体積固有抵抗が低い、請求項10又は11に記載の太陽電池セルの製造方法。
- 前記受光面グリッド電極および前記バスバー電極は、スクリーン印刷によって形成される、請求項8〜12のいずれかに記載の太陽電池セルの製造方法。
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WO2017002265A1 (ja) * | 2015-07-02 | 2017-01-05 | 三菱電機株式会社 | 太陽電池セルおよび太陽電池セルの製造方法 |
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US8629294B2 (en) | 2011-08-25 | 2014-01-14 | Honeywell International Inc. | Borate esters, boron-comprising dopants, and methods of fabricating boron-comprising dopants |
US8975170B2 (en) | 2011-10-24 | 2015-03-10 | Honeywell International Inc. | Dopant ink compositions for forming doped regions in semiconductor substrates, and methods for fabricating dopant ink compositions |
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WO2017002265A1 (ja) * | 2015-07-02 | 2017-01-05 | 三菱電機株式会社 | 太陽電池セルおよび太陽電池セルの製造方法 |
JPWO2017002265A1 (ja) * | 2015-07-02 | 2017-10-05 | 三菱電機株式会社 | 太陽電池セルおよび太陽電池セルの製造方法 |
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