JP2017017323A - 太陽電池及びその製造方法 - Google Patents
太陽電池及びその製造方法 Download PDFInfo
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- 239000002019 doping agent Substances 0.000 claims abstract description 101
- 238000000034 method Methods 0.000 claims abstract description 62
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 55
- 239000001301 oxygen Substances 0.000 claims abstract description 55
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 55
- 239000013078 crystal Substances 0.000 claims abstract description 18
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- 239000007789 gas Substances 0.000 claims description 11
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical group O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 3
- 238000009751 slip forming Methods 0.000 claims 1
- 239000010408 film Substances 0.000 description 62
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- 230000015572 biosynthetic process Effects 0.000 description 6
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 5
- 229910021417 amorphous silicon Inorganic materials 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 229910021424 microcrystalline silicon Inorganic materials 0.000 description 4
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 3
- 239000005388 borosilicate glass Substances 0.000 description 3
- 238000005229 chemical vapour deposition Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
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- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 3
- 239000005360 phosphosilicate glass Substances 0.000 description 3
- 230000006798 recombination Effects 0.000 description 3
- 238000005215 recombination Methods 0.000 description 3
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
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- 239000000203 mixture Substances 0.000 description 2
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- 229910000077 silane Inorganic materials 0.000 description 2
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- GYHNNYVSQQEPJS-UHFFFAOYSA-N Gallium Chemical compound [Ga] GYHNNYVSQQEPJS-UHFFFAOYSA-N 0.000 description 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052787 antimony Inorganic materials 0.000 description 1
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 229920001940 conductive polymer Polymers 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
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- -1 for example Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 229910021480 group 4 element Inorganic materials 0.000 description 1
- 229910021478 group 5 element Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000003698 laser cutting Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 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 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- RLOWWWKZYUNIDI-UHFFFAOYSA-N phosphinic chloride Chemical compound ClP=O RLOWWWKZYUNIDI-UHFFFAOYSA-N 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
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- 238000001771 vacuum deposition Methods 0.000 description 1
- 238000005019 vapor deposition process Methods 0.000 description 1
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Abstract
Description
Claims (20)
- 半導体基板と、
前記半導体基板の一面上に位置し、前記半導体基板とは異なる結晶構造を持ち、ドーパントを含むドーパント層と
を含み、
前記ドーパント層は、界面層を挟んで厚さ方向に積層される複数の半導体層を含み、
前記界面層は、前記複数の半導体層のそれぞれより高い酸素濃度を持つ酸化物層である、太陽電池。 - 前記複数の半導体層のそれぞれが多結晶構造のシリコン層であり、
前記界面層がシリコン酸化物層である、請求項1に記載の太陽電池。 - 前記界面層の酸素濃度が前記複数の半導体層のそれぞれの酸素濃度の少なくとも1.5倍である、請求項1に記載の太陽電池。
- 前記界面層の酸素濃度が前記複数の半導体層のそれぞれの酸素濃度の2倍〜10倍である、請求項3に記載の太陽電池。
- 前記界面層が前記複数の半導体層のそれぞれより薄い、請求項1に記載の太陽電池。
- 前記半導体基板と前記ドーパント層の間にトンネリング層が位置し、
前記界面層の厚さが前記トンネリング層の厚さと等しいか又はより薄い、請求項1に記載の太陽電池。 - 前記半導体基板と前記ドーパント層の間にトンネリング層が位置し、
前記界面層の酸素濃度が前記トンネリング層の酸素濃度より低い、請求項1に記載の太陽電池。 - 前記界面層の厚さが1nm以下である、請求項1に記載の太陽電池。
- 前記界面層は、前記ドーパント層にある複数の界面層を含む、請求項1に記載の太陽電池。
- 前記界面層は、隣接する前記複数の半導体層と接触する、請求項1に記載の太陽電池。
- 前記ドーパント層に含まれる前記ドーパントが前記半導体基板より高いドーピング濃度を持つか、又は、前記ドーパント層に含まれる前記ドーパントが前記半導体基板と異なる導電型を持つように、前記ドーパント層に含まれる前記ドーパントと、前記半導体基板とは、同一の導電型であり、
前記ドーパント層は、導電領域又は電界領域を構成する、請求項1に記載の太陽電池。 - 前記導電領域が、前記半導体基板の前記一面上に位置する第1導電領域と前記半導体基板の他面に位置する第2導電領域を含み、
第1電極は、前記第1導電領域に連結され、第2電極は、前記第2導電領域に連結され、
前記ドーパント層は前記第1導電領域を構成し、
前記第2導電領域は前記半導体基板の一部をなすドーピング領域として構成される、請求項11に記載の太陽電池。 - 前記第2導電領域は前記半導体基板の前面側に位置し、
前記第1導電領域は前記半導体基板の後面上に位置する、請求項12に記載の太陽電池。 - 前記導電領域が、前記半導体基板の他面に位置し、第1導電型を持つ第1導電領域、及び第2導電型を持つ第2導電領域を含み、
前記ドーパント層は、前記第1導電領域、又は前記半導体基板の前記一面に位置した前記電界領域である、請求項11に記載の太陽電池。 - 半導体基板上にドーパント層を形成する段階
を含み、
前記ドーパント層を形成する段階は、
非ドープ半導体層及びドーパントを含むドープ半導体層を含む複数の半導体層を形成する段階と、
前記ドープ半導体層に含まれた前記ドーパントを前記非ドープ半導体層に拡散させる熱処理段階と、
を含む、太陽電池の製造方法。 - 前記複数の半導体層を形成する段階において、前記非ドープ半導体層と前記ドープ半導体層の間に、酸素濃度が前記複数の半導体層のそれぞれより高い酸化物層からなる界面層が形成される、請求項15に記載の太陽電池の製造方法。
- 前記非ドープ半導体層と前記ドープ半導体層を同一装置内で連続的に形成する、請求項15に記載の太陽電池の製造方法。
- 前記複数の半導体層を形成する段階において、前記非ドープ半導体層を形成する工程と前記ドープ半導体層を含む工程の間に気体を変更する工程を行い、
前記気体を変更する工程において酸化物層からなる界面層が自然に形成される、請求項17に記載の太陽電池の製造方法。 - 前記複数の半導体層を形成する段階は、
前記半導体基板上に非ドープ半導体層を形成する段階と、
前記非ドープ半導体層上に前記ドープ半導体層を形成する段階と、 を含み、
前記ドープ半導体層を形成する段階の後、前記非ドープ半導体層は前記ドープ半導体層から遠くなるほどドーピング濃度が漸進的に低くなる部分を含む、請求項15に記載の太陽電池の製造方法。 - 前記複数の半導体層を形成する段階において、前記複数の半導体層が多結晶構造を持つ、請求項15に記載の太陽電池の製造方法。
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