JP2022501837A - 結晶シリコン太陽電池およびその製造方法 - Google Patents
結晶シリコン太陽電池およびその製造方法 Download PDFInfo
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- 229910021419 crystalline silicon Inorganic materials 0.000 title claims abstract description 61
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 198
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 198
- 239000010703 silicon Substances 0.000 claims abstract description 198
- 238000002161 passivation Methods 0.000 claims abstract description 80
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims abstract description 66
- 229920005591 polysilicon Polymers 0.000 claims abstract description 66
- 238000000034 method Methods 0.000 claims abstract description 53
- 238000000151 deposition Methods 0.000 claims abstract description 11
- 238000005245 sintering Methods 0.000 claims abstract description 3
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 31
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical group N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 31
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 21
- 238000009792 diffusion process Methods 0.000 claims description 19
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 230000005684 electric field Effects 0.000 claims description 15
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 14
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 14
- 239000002003 electrode paste Substances 0.000 claims description 14
- 229910052698 phosphorus Inorganic materials 0.000 claims description 14
- 239000011574 phosphorus Substances 0.000 claims description 14
- 239000005360 phosphosilicate glass Substances 0.000 claims description 12
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 11
- 238000005229 chemical vapour deposition Methods 0.000 claims description 9
- 238000005553 drilling Methods 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 7
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 claims description 7
- 229910004298 SiO 2 Inorganic materials 0.000 claims description 5
- 229910021421 monocrystalline silicon Inorganic materials 0.000 claims description 5
- 238000002407 reforming Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010521 absorption reaction Methods 0.000 abstract description 7
- 238000005530 etching Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 abstract 1
- 235000012431 wafers Nutrition 0.000 description 173
- 239000010408 film Substances 0.000 description 117
- 238000005516 engineering process Methods 0.000 description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 18
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 12
- 238000006243 chemical reaction Methods 0.000 description 11
- 239000000758 substrate Substances 0.000 description 11
- 239000002131 composite material Substances 0.000 description 9
- 238000003698 laser cutting Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 9
- 239000000377 silicon dioxide Substances 0.000 description 9
- 235000012239 silicon dioxide Nutrition 0.000 description 9
- 230000002093 peripheral effect Effects 0.000 description 8
- 239000012528 membrane Substances 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000001039 wet etching Methods 0.000 description 7
- 239000000243 solution Substances 0.000 description 6
- 238000004518 low pressure chemical vapour deposition Methods 0.000 description 5
- 239000010409 thin film Substances 0.000 description 4
- 239000013585 weight reducing agent Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000031700 light absorption Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 2
- 239000000969 carrier Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 101001073212 Arabidopsis thaliana Peroxidase 33 Proteins 0.000 description 1
- 101001123325 Homo sapiens Peroxisome proliferator-activated receptor gamma coactivator 1-beta Proteins 0.000 description 1
- 102100028961 Peroxisome proliferator-activated receptor gamma coactivator 1-beta Human genes 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- 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
- H01L31/18—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof
- H01L31/1804—Processes or apparatus specially adapted for the manufacture or treatment of these devices or of parts thereof comprising only elements of Group IV of the Periodic Table
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- H01L31/182—Special manufacturing methods for polycrystalline Si, e.g. Si ribbon, poly Si ingots, thin films of polycrystalline Si
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- H01L31/02—Details
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- H01L31/072—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 heterojunction type
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Abstract
Description
(1) シリコンウェーハの表面にテクスチャリング面を形成することと、
(2) シリコンウェーハの表面にトンネル層、およびドープトポリシリコン層を堆積させることと、
(3) シリコンウェーハの表面に第1の反射防止膜層を堆積させることと、
(4) シリコンウェーハの表面の非電極領域のトンネル層、ドープトポリシリコン層と第1の反射防止膜層を除去することと、を含む。一実施例では、ステップ(4)は、レーザーを使用して実行することができる。
(5) シリコンウェーハの表面にテクスチャリング面を再形成することと、
(6) シリコンウェーハの表面にリン拡散を施すことと、
(7) シリコンウェーハの裏面と周辺のPN接合、および表面のホスホシリケートガラスを除去することと、
(8) シリコンウェーハの裏面にパッシベーション膜を堆積させることと、
(9) シリコンウェーハの表面に第2の反射防止膜層を堆積させることと、
(10) シリコンウェーハの裏面にレーザー孔あけ加工を行うことと、
(11) シリコンウェーハの裏面に裏面電極ペーストとアルミニウムペーストを印刷し、表面に表面電極ペーストを印刷して、乾燥させることと、
(12) ステップ(11)で得られたシリコンウェーハを高温で焼結し、裏面電極、アルミニウム裏面電界と表面電極を形成し、選択的パッシベーションコンタクト型結晶シリコン太陽電池の完成品を得ることと、を含む。
表面電極とシリコンウェーハの間にはトンネル層、ドープトポリシリコン層、および反射防止膜層が設けられ、結晶シリコン太陽電池は、上記の製造方法を利用して製造することができる。本開示はさらに、結晶シリコン太陽電池を提供し、それは、シリコンウェーハ、およびシリコンウェーハの表面に設けられた反射防止膜層と表面電極を含む。表面電極とシリコンウェーハの間にはトンネル層、ドープトポリシリコン層、および反射防止膜層が設けられる。シリコンウェーハの表面における表面電極がない領域では、反射防止膜層がシリコンウェーハと直接接触する。
Claims (19)
- (1) シリコンウェーハの表面にテクスチャリング面を形成することと、
(2) 前記シリコンウェーハの前記表面にトンネル層、およびドープトポリシリコン層を堆積させることと、
(3) 前記シリコンウェーハの前記表面に第1の反射防止膜層を堆積させることと、
(4) 前記シリコンウェーハの前記表面の非電極領域の前記トンネル層、前記ドープトポリシリコン層、および前記第1の反射防止膜層を除去することとを含む
ことを特徴とする結晶シリコン太陽電池の製造方法。 - (5) 前記シリコンウェーハの前記表面にテクスチャリング面を再形成することと、
(6) 前記シリコンウェーハの表面にリン拡散を施すことと、
(7) 前記シリコンウェーハの裏面と周辺のPN接合、および表面のホスホシリケートガラスを除去することと、
(8) 前記シリコンウェーハの前記裏面にパッシベーション膜を堆積させることと、
(9) 前記シリコンウェーハの前記表面に第2の反射防止膜層を堆積させることと、
(10) 前記シリコンウェーハの前記裏面にレーザー孔あけ加工を行うことと、
(11) 前記シリコンウェーハの前記裏面に裏面電極ペーストとアルミニウムペーストを印刷し、前記表面に表面電極ペーストを印刷して乾燥させることと、
(12) ステップ(11)で得られた前記シリコンウェーハを高温で焼結し、裏面電極、アルミニウム裏面電界と表面電極を形成することとをさらに含む
請求項1に記載の結晶シリコン太陽電池の製造方法。 - 前記トンネル層はSiO2層であり、その厚さは0.5−8nmであり、前記ドープトポリシリコン層の厚さは5−250nmである
請求項1に記載の結晶シリコン太陽電池の製造方法。 - 前記トンネル層の厚さは0.5−3nmであり、前記ドープトポリシリコン層の厚さは50−150nmである
請求項3に記載の結晶シリコン太陽電池の製造方法。 - ステップ(2)が完了した後、前記シリコンウェーハのシート抵抗は40−160 Ω/sqである
請求項3に記載の結晶シリコン太陽電池の製造方法。 - ステップ(3)では、プラズマ化学気相成長法により、前記第1の反射防止膜層を堆積させ、前記第1の反射防止膜層は窒化ケイ素膜層であり、その厚さは10−100nmである
請求項1に記載の結晶シリコン太陽電池の製造方法。 - 前記表面電極は、前記ドープトポリシリコン層、前記第1の反射防止膜層、および前記第2の反射防止膜層を介して前記トンネル層と接触する
請求項2に記載の結晶シリコン太陽電池の製造方法。 - 前記シリコンウェーハは、P型単結晶シリコンであり、前記ドープトポリシリコン層は、リンがドープされたN+型ポリシリコン層である
請求項1に記載の結晶シリコン太陽電池の製造方法。 - ステップ(5)では、NaOH、Na2SiO3とイソプロパノールの混合溶液を使用して前記シリコンウェーハの前記表面をエッチングし、テクスチャリング面を製造する
請求項2に記載の結晶シリコン太陽電池の製造方法。 - ステップ(4)では、レーザーを使用して実行する
請求項1に記載の結晶シリコン太陽電池の製造方法。 - 請求項1ないし10のいずれかに記載の結晶シリコン太陽電池の製造方法により製造された
ことを特徴とする結晶シリコン太陽電池。 - シリコンウェーハ、および前記シリコンウェーハの表面に設けられた反射防止膜層と表面電極を含み、
ここで、前記表面電極と前記シリコンウェーハの間にはトンネル層、ドープトポリシリコン層、および前記反射防止膜層が設けられ、
また、前記シリコンウェーハの前記表面における前記表面電極がない領域では、前記反射防止膜層が前記シリコンウェーハと直接接触する
ことを特徴とする結晶シリコン太陽電池。 - 前記シリコンウェーハの裏面に設けられたパッシベーション膜、裏面電極、および裏面電界をさらに含む
請求項12に記載の結晶シリコン太陽電池。 - 前記トンネル層はSiO2層であり、その厚さは0.5−8nmであり、前記ドープトポリシリコン層の厚さは5−250nmである
請求項12に記載の結晶シリコン太陽電池。 - 前記トンネル層の厚さは0.5−3nmであり、前記ドープトポリシリコン層の厚さは50−150nmである
請求項14に記載の結晶シリコン太陽電池。 - プラズマ化学気相成長法により前記反射防止膜層を堆積させ、かつ前記反射防止膜層は窒化ケイ素膜層である
請求項12に記載の結晶シリコン太陽電池。 - 前記シリコンウェーハは、P型単結晶シリコンであり、前記ドープトポリシリコン層は、リンがドープされたN+型ポリシリコン層である
請求項12に記載の結晶シリコン太陽電池。 - 前記パッシベーション膜は、酸化アルミニウム膜および窒化ケイ素膜を含み、前記酸化アルミニウム膜は、前記シリコンウェーハと前記窒化ケイ素膜との間に設けられる
請求項13に記載の結晶シリコン太陽電池。 - 前記パッシベーション膜は開孔を含み、前記裏面電界は前記開孔を介して前記シリコンウェーハと接触する
請求項13に記載の結晶シリコン太陽電池。
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