JP2017028278A - 太陽電池及び太陽電池モジュール - Google Patents
太陽電池及び太陽電池モジュール Download PDFInfo
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- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 5
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 4
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- 229910052581 Si3N4 Inorganic materials 0.000 description 3
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- 229910007116 SnPb Inorganic materials 0.000 description 1
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- 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
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- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
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- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
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Abstract
Description
Claims (25)
- 第1導電型の不純物がドーピングされた半導体基板と、
前記第1導電型と反対の第2導電型の不純物がドーピングされ、第1方向に長く伸びたエミッタ部と、
前記半導体基板より前記第1導電型の不純物が高濃度にドーピングされ、前記エミッタ部と並行するように、前記第1方向に長く伸びた背面電界部と、
前記エミッタ部に電気的に接続され、前記第1方向に長く伸びた第1電極と、
前記背面電界部に電気的に接続され、前記第1方向に長く伸びた第2電極とを含み、
前記第1電極の線幅は、前記第1方向に離隔された2地点で互いに異なるように形成され、
前記第2電極の線幅は、前記第1方向に離隔された2地点で互いに異なるように形成され、
前記第1電極の線幅と第2電極の線幅は、前記第1方向に交差する第2方向線上の離隔された2地点で互いに異なる、太陽電池。 - 前記第1電極は、前記第1方向に進行することにより、第1最大線幅を有する部分と前記第1最大線幅より小さい第1最小線幅を有する部分が繰り返し形成され、
前記第2電極は、前記第1方向に進行することにより、第2最大線幅を有する部分と前記第2最大線幅より小さい第2最小線幅を有する部分が繰り返し形成され、
前記第1電極の線幅は、前記第1最小線幅と前記第1最大線幅の間で漸進的に増加するか減少し、前記第2電極の線幅は、前記第2最小線幅と前記第2最大線幅の間で漸進的に増加するか減少する、請求項1に記載の太陽電池。 - 前記第1電極が前記第1最大線幅を有する部分と前記第2電極が前記第2最小線幅を有する部分は、前記第1方向と交差する第2方向に同じライン線上に位置し、
前記第1電極が前記第1最小線幅を有する部分と前記第2電極が前記第2最大線幅を有する部分は、前記第2方向に同一ライン線上に位置する、請求項2に記載の太陽電池。 - 前記第1電極の線幅が、前記第1最小線幅から前記第1最大線幅まで増加するとき、前記第1電極の線幅が増加する角は、前記第1方向に基づいて、5°〜85°の間である、請求項2に記載の太陽電池。
- 前記第2電極の線幅が、前記第2最小線幅から前記第2最大線幅まで増加するとき、前記第2電極の線幅が増加する角は、前記第1方向に基づいて、5°〜85°の間である、請求項4に記載の太陽電池。
- 前記第2電極の線幅が増加する角は、前記第1電極の線幅が増加する角より小さいか同じであり、
前記第1最大線幅は、前記第2最大線幅より大きく、前記第1最小線幅は、前記第2最小線幅と同じか、さらに大きい、請求項5に記載の太陽電池。 - 前記第1電極の平均線幅は、前記第2電極の平均線幅より大きく、
前記第2電極の平均線幅対比、前記第1電極の平均線幅の割合は、1:1.5〜3である、請求項2に記載の太陽電池。 - 前記第1電極から前記第1最小線幅対比、前記第1最大線幅の割合は、1:2〜10であり、
前記第2電極から前記第2最小線幅対比、前記第2最大線幅の割合は、1:2〜8である、請求項2に記載の太陽電池。 - 前記エミッタ部と前記背面電界部のそれぞれは、前記第1方向に進行することにより、線幅が均一であるストライプ形状である、請求項2に記載の太陽電池。
- 前記エミッタ部と前記背面電界部の内、いずれか1つの平均線幅は、残りの1つの平均線幅より大きい、請求項9に記載の太陽電池。
- 前記エミッタ部と前記背面電界部のそれぞれの線幅は、前記第1方向に進行することにより、漸進的に繰り返し変化する、請求項2に記載の太陽電池。
- 前記エミッタ部は、前記第1電極が前記第1最大線幅を有する部分において最大線幅を有し、前記第1電極が前記第1最小線幅を有する部分で最小線幅を有し、
前記背面電界部は、前記第2電極が前記第2最大線幅を有する部分で最大線幅を有し、前記第2電極が前記第2最小線幅を有する部分で最小線幅を有する、請求項11に記載の太陽電池。 - 半導体基板、及び前記半導体基板の背面に第1方向に長く伸びて形成された複数の第1、第2電極を含む複数の太陽電池と、
前記複数の太陽電池の内、互いに隣接する2つの太陽電池の内、いずれか1つの第1太陽電池に備えられた複数の第1電極と電気的に接続され、前記第1方向と交差する第2方向に長く伸びている複数の第1導電性配線と、残りの1つの第2太陽電池に備えられた複数の第2電極と電気的に接続され、前記第2方向に長く伸びている複数の第2導電性配線とを含み、
前記第1電極の線幅は、前記第1電極の第1方向線上の内、前記第1導電性配線と交差する地点と前記第2導電性配線と交差する地点で互いに異なるように形成され、
前記第2電極の線幅は、前記第2電極の第1方向線上に位置する前記第1導電性配線と交差する地点と前記第2導電性配線と交差する地点で互いに異なるように形成され、
前記第2方向に沿って、第1導電性配線や第2導電性配線と交差する地点で、前記第1電極の線幅と前記第2電極の線幅が互いに異なる、太陽電池モジュール。 - 前記第1電極の線幅は、前記第1電極の前記第1方向線上の内、前記第1導電性配線と交差して電気的に接続される地点で最大線幅を有し、前記第2導電性配線と交差して絶縁される地点で最小線幅を有し、
前記第2電極の線幅は、前記第2電極の前記第1方向線上の内、前記第1導電性配線と交差し、絶縁される地点で、最小線幅を有し、前記第2導電性配線と交差して電気的に接続される地点で最大線幅を有する、請求項13に記載の太陽電池モジュール。 - 前記第2電極の最小線幅対比、前記第1電極の最大線幅の割合は、1:2〜10である、請求項14に記載の太陽電池モジュール。
- 前記第1電極の最小線幅対比、前記第2電極の最大線幅の割合は、1:2〜8である、請求項14に記載の太陽電池モジュール。
- 前記第2電極の最小線幅対比、前記第1電極の最大線幅の割合は、前記第1電極の最小線幅対比、前記第2電極の最大線幅の割合と互いに異なる、請求項14に記載の太陽電池モジュール。
- 前記第1、第2電極のそれぞれは、前記最大線幅と前記最小線幅の間で線幅が漸進的に増加するか減少する、請求項14に記載の太陽電池モジュール。
- 前記複数の太陽電池は、
第1導電型を有する前記半導体基板と反対の第2導電型の不純物がドーピングされ、第1方向に長く伸びたエミッタ部と、前記半導体基板より前記第1導電型の不純物を高濃度にドーピングされ、前記エミッタ部と並行するように、前記第1方向に長く伸びた背面電界部とを備え、
前記エミッタ部に接続される前記第1電極の最大線幅は、前記背面電界部に接続される前記第2電極の最大線幅より大きい、請求項14に記載の太陽電池モジュール。 - 前記背面電界部に接続される前記第2電極の最小線幅は、前記エミッタ部に接続される前記第1電極の最小線幅より小さい、請求項14に記載の太陽電池モジュール。
- 前記エミッタ部に接続される前記第1電極の平均線幅は、前記背面電界部に接続される前記第2電極の平均線幅より大きい、請求項14に記載の太陽電池モジュール。
- 前記第1電極は、前記第1導電性配線との間に導電性接着剤を介して電気的に接続され、前記第2導電性配線との間には絶縁層によって絶縁され、
前記第2電極は、前記第2導電性配線との間に導電性接着剤を介して電気的に接続され、前記第1導電性配線との間には前記絶縁層によって絶縁される、請求項13に記載の太陽電池モジュール。 - 前記エミッタ部の線幅と前記背面電界部の線幅は、前記第1方向に沿って均一したり、前記エミッタ部の線幅と前記背面電界部の線幅は、前記第1方向に沿って前記第1、第2電極の線幅の変化に対応して増加するか減少する、請求項13に記載の太陽電池モジュール。
- 前記第1太陽電池に接続された複数の第1導電性配線と前記第2太陽電池に接続された複数の第2導電性配線は、互いに重畳されて接続されたり一体に形成される、請求項13に記載の太陽電池モジュール。
- 前記第1太陽電池に接続された複数の第1導電性配線と前記第2太陽電池に接続された複数の第2導電性配線は、前記第1、第2太陽電池との間で、前記第1方向に長く伸びたインターコネクタに共通に接続される、請求項13に記載の太陽電池モジュール。
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