JP2015015472A - 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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- 229910052787 antimony Inorganic materials 0.000 description 4
- WATWJIUSRGPENY-UHFFFAOYSA-N antimony atom Chemical compound [Sb] WATWJIUSRGPENY-UHFFFAOYSA-N 0.000 description 4
- 229910052785 arsenic Inorganic materials 0.000 description 4
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Abstract
【解決手段】本発明の実施例に係る太陽電池は、半導体基板と、前記半導体基板の一面上に形成されるトンネル層と、前記トンネル層上に形成される第1導電型半導体層と、前記トンネル層上に形成される第2導電型半導体層と、を含み、前記トンネル層上において前記第1及び第2導電型半導体層の境界部分の少なくとも一部に、前記第1及び第2導電型半導体層を分離する分離部分が位置する。
【選択図】図1
Description
20 トンネル層
32 第1導電型半導体層
34 第2導電型半導体層
36 トレンチ部
40 絶縁層
42 第1電極
44 第2電極
50 反射防止膜
60 パッシベーション膜
62 前面電界層
100 太陽電池
110 ベース領域
Claims (20)
- 半導体基板と、
前記半導体基板の一面上に形成されるトンネル層と、
前記トンネル層上に形成される第1導電型半導体層と、
前記トンネル層上に形成される第2導電型半導体層と、を含み、
前記トンネル層上において前記第1及び第2導電型半導体層の境界部分の少なくとも一部に、前記第1及び第2導電型半導体層を分離する分離部分が位置する、太陽電池。 - 前記トンネル層は、前記半導体基板の一面上に全体的に形成され、
前記分離部分が、前記トンネル層及び前記半導体基板に形成されない、請求項1に記載の太陽電池。 - 平面視で、前記分離部分が、前記第1導電型半導体層と前記第2導電型半導体層との間に部分的に形成される、請求項1に記載の太陽電池。
- 前記分離部分は、空き空間として構成されるトレンチ部を含む、請求項3に記載の太陽電池。
- 前記分離部分に真性半導体層が形成される、請求項3に記載の太陽電池。
- 前記真性半導体層が、多結晶、微細結晶、または非晶質シリコンを含む、請求項5に記載の太陽電池。
- 前記分離部分に位置した前記真性半導体層が、前記第1導電型半導体層と前記第2導電型半導体層との間を全体的に充填しながら形成される、請求項5に記載の太陽電池。
- 前記分離部分に位置した前記真性半導体層が、前記第1導電型半導体層と前記第2導電型半導体層との間に部分的に形成される、請求項5に記載の太陽電池。
- 前記分離部分に位置した前記真性半導体層が、前記第1導電型半導体層及び前記第2導電型半導体層のうち少なくとも一つと同一の厚さを有する、請求項5に記載の太陽電池。
- 前記分離部分に位置した前記真性半導体層が、前記第1導電型半導体層及び前記第2導電型半導体層よりも薄い厚さを有する、請求項5に記載の太陽電池。
- 平面視で、前記分離部分が、前記第1導電型半導体層と前記第2導電型半導体層との間に全体的に形成される、請求項1に記載の太陽電池。
- 前記分離部分は、空き空間として構成されるトレンチ部を含む、請求項11に記載の太陽電池。
- 前記トレンチ部が、連続して形成される単一のトレンチ部として構成される、請求項12に記載の太陽電池。
- 前記第1導電型半導体層は、互いに並んで配置される複数の第1枝部を含み、
前記第2導電型半導体層は、互いに並んで配置される複数の第2枝部を含み、
前記トレンチ部は、前記第1枝部と前記第2枝部との間で前記第1及び第2枝部の長手方向に沿って長く延びる複数の第1トレンチ部分と、前記複数の第1トレンチ部分のうち互いに隣接する2つの第1トレンチ部分を交互に連結する第2トレンチ部分とを含む、請求項13に記載の太陽電池。 - 半導体基板の一面上に形成されるトンネル層を形成するステップと、
前記トンネル層上に、互いに接する第1導電型半導体層及び第2導電型半導体層を形成するステップと、
前記トンネル層上において前記第1及び第2導電型半導体層を選択的に除去して、前記第1及び第2導電型半導体層の境界部分の少なくとも一部にトレンチ部を形成するステップと、を含む、太陽電池の製造方法。 - 前記トレンチ部を形成するステップでは、前記トンネル層を除去せずに、前記第1及び第2導電型半導体層を除去する、請求項15に記載の太陽電池の製造方法。
- 前記トレンチ部を形成するステップでは、前記トンネル層、そして、前記第1及び第2導電型半導体層に対するエッチング比が異なるエッチング溶液を使用するか、またはレーザーを使用する、請求項15に記載の太陽電池の製造方法。
- 前記エッチング溶液がテトラメチルアンモニウムヒドロキシド(tetramethylammonium hydroxide、TMAH)を含み、
前記トンネル層がシリコン酸化物を含み、
前記第1及び第2導電型半導体層がシリコンを含む、請求項17に記載の太陽電池の製造方法。 - 半導体基板を準備するステップと、
前記半導体基板の一面上にトンネル層を形成するステップと、
前記トンネル層上に真性半導体層を形成するステップと、
前記真性半導体層に第1導電型不純物及び第2導電型不純物をドープして、第1導電型半導体層及び第2導電型半導体層を形成するドーピングステップと、を含み、
前記ドーピングステップでは、前記第1導電型半導体層及び前記第2導電型半導体層の間の境界部分を部分的にドープしないことで分離部分を形成する、太陽電池の製造方法。 - 前記ドーピングステップは、
前記真性半導体層上に前記第1導電型不純物を含む第1ドーピング層を形成するステップと、
前記真性半導体層上において前記第1ドーピング層及び前記第1ドーピング層の周辺部の一部にアンドープ層を形成するステップと、
前記真性半導体層、前記第1ドーピング層及び前記アンドープ層上に全体的に前記第2導電型不純物を含む第2ドーピング層を形成するステップと、
熱処理により、前記第1導電型不純物及び前記第2導電型不純物を前記真性半導体層に拡散させて、前記第1導電型半導体層、前記第2導電型半導体層及び前記分離部分を同時に形成する拡散ステップと、を含み、
前記拡散ステップでは、前記第1導電型不純物が拡散された部分が前記第1導電型半導体層を構成し、前記第2導電型不純物が拡散された部分が前記第2導電型半導体層を構成し、前記第1導電型半導体層と前記第2導電型半導体層との間にドープされていない領域が前記分離部分を構成する、請求項19に記載の太陽電池の製造方法。
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JP2018082160A (ja) * | 2017-10-24 | 2018-05-24 | 信越化学工業株式会社 | 高光電変換効率太陽電池、その製造方法、太陽電池モジュール及び太陽光発電システム |
JP2020170830A (ja) * | 2019-04-05 | 2020-10-15 | 株式会社アルバック | TOPCon−BC構造の結晶系太陽電池の製造方法、及びTOPCon−BC構造の結晶系太陽電池 |
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CN104282782A (zh) | 2015-01-14 |
JP6254493B2 (ja) | 2017-12-27 |
EP2822041B1 (en) | 2022-10-19 |
KR101622089B1 (ko) | 2016-05-18 |
KR20150005834A (ko) | 2015-01-15 |
EP2822041A1 (en) | 2015-01-07 |
US20150007879A1 (en) | 2015-01-08 |
CN104282782B (zh) | 2016-09-14 |
US10833210B2 (en) | 2020-11-10 |
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