JP2024082212A - 太陽電池及びその製造方法、光起電力モジュール - Google Patents
太陽電池及びその製造方法、光起電力モジュール Download PDFInfo
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Abstract
Description
比較例
図1に示すように、本願の実施例によって提供された太陽電池において、非金属パターン領域11の基板100表面が第1領域12と第2領域13を備え、第1領域12の基板100表面が金属パターン領域10の基板100表面よりも低く、第2領域13の基板100表面の高さが第1領域12の基板100表面の高さより低くなく、かつ金属パターン領域10の基板100表面の高さよりも高くなく、第1領域12と第2領域13の基板100にドーピング層120を設置し、基板100がドーピング層120の上面に露出し、金属パターン領域10の基板100表面に第1パッシベーションコンタクト構造110を設置する。比較例では、基板表面は平坦な表面であり、かつドーピング層は金属パターン領域の基板及び非金属パターン領域の基板に位置し、基板がドーピング層の上面に露出している。比較実験によって、本願の実施例と比較例のパラメータ比較を表1に示す。
Claims (22)
- 表面に金属パターン領域と非金属パターン領域を有する基板と、第1領域及び第2領域の基板内に位置するドーピング層と、前記金属パターン領域の基板表面を覆う第1パッシベーションコンタクト構造と、を含み、
前記非金属パターン領域は隣接する前記第1領域及び前記第2領域を含み、前記第2領域の前記第1領域から遠い側は前記金属パターン領域に隣接し、前記第1領域の基板表面は前記金属パターン領域の基板表面よりも低く、前記第2領域の基板表面は前記第1領域の基板表面より低くなく、かつ前記金属パターン領域の基板表面より高くなく、
前記基板がドーピング層の上面に露出しており、
前記第1パッシベーションコンタクト構造は、積層された少なくとも1層の第1トンネル層及び少なくとも1層の第1ドーピング導電層を含む、
ことを特徴とする太陽電池。 - 前記第1ドーピング導電層のドーピング元素と前記ドーピング層のドーピング元素は同族元素である、
ことを特徴とする請求項1に記載の太陽電池。 - 前記第1ドーピング導電層のドーピング元素濃度は前記ドーピング層のドーピング元素濃度以上である、
ことを特徴とする請求項2に記載の太陽電池。 - 前記第1ドーピング導電層のドーピング元素濃度は1×1019atoms/cm3~9×1020atoms/cm3であり、前記ドーピング層のドーピング元素濃度は1×1016atoms/cm3~1×1020atoms/cm3である、
ことを特徴とする請求項3に記載の太陽電池。 - 前記ドーピング層のドーピング元素の種類は前記基板のドーピング元素の種類と異なっている、
ことを特徴とする請求項3に記載の太陽電池。 - 前記ドーピング層のドーピング元素濃度は前記基板のドーピング元素濃度よりも大きい、
ことを特徴とする請求項5に記載の太陽電池。 - 前記第1領域の基板表面と前記第2領域の基板表面との間に第1挟角があり、前記第1挟角は90°~160°である、
ことを特徴とする請求項1に記載の太陽電池。 - 前記第2領域のドーピング層のドーピング元素濃度は、前記第1領域のドーピング層のドーピング元素濃度より小さくなく、かつ前記第1ドーピング導電層のドーピング元素濃度より大きくない、
ことを特徴とする請求項7に記載の太陽電池。 - 前記第1領域のドーピング層の前記第1ドーピング導電層に向かう側から、前記第1領域のドーピング層の前記第1ドーピング導電層から離れる側に向かう方向において、前記第2領域のドーピング層のドーピング元素濃度が次第に減少する、
ことを特徴とする請求項8に記載の太陽電池。 - 前記第2領域のドーピング層の前記第1ドーピング導電層に向かう側の表面のドーピング濃度と前記第2領域のドーピング層の前記第1ドーピング導電層から遠い側の表面のドーピング濃度との差は、1×1019atoms/cm3~8×1020atoms/cm3である、
ことを特徴とする請求項9に記載の太陽電池。 - 前記ドーピング層のシート抵抗は80ohm/sq~1000ohm/sqである、
ことを特徴とする請求項9に記載の太陽電池。 - 前記金属パターン領域の基板表面と前記第1領域の基板表面との高さの差は0.1μm~10μmである、
ことを特徴とする請求項7に記載の太陽電池。 - 前記第1パッシベーションコンタクト構造は、前記基板から離れた方向に沿って積層された複数のサブ第1パッシベーションコンタクト構造を含み、前記サブ第1パッシベーションコンタクト構造が、前記基板から離れた方向に沿って積層された前記第1トンネル層及び前記第1ドーピング導電層を含む、
ことを特徴とする請求項1に記載の太陽電池。 - 前記基板の前記第1パッシベーションコンタクト構造から遠い側の表面に位置する第2パッシベーションコンタクト構造をさらに備え、前記第2パッシベーションコンタクト構造は、積層された少なくとも1層の第2トンネル層と、少なくとも1層の第2ドーピング導電層と、を含む、
ことを特徴とする請求項1に記載の太陽電池。 - 前記ドーピング層の上面及び前記第1パッシベーションコンタクト構造の上面と側面に位置する第1パッシベーション層をさらに含む、
ことを特徴とする請求項1に記載の太陽電池。 - 第1電極をさらに含み、前記第1電極が前記第1パッシベーション層を貫通して前記第1ドーピング導電層と電気的に接続される、
ことを特徴とする請求項15に記載の太陽電池。 - 請求項1~16のいずれか1項に記載の太陽電池を複数接続してなる電池ストリングと、
前記電池ストリングの表面を覆うために用いられる封止層と、
前記封止層の前記電池ストリングから離れた表面を覆うために用いられるカバープレートと、を含む、
ことを特徴とする光起電力モジュール。 - 基板を提供することであって、前記基板は初期表面を有し、前記初期表面は金属パターン領域及び非金属パターン領域を備えることと、
前記基板の初期表面に前記基板から離れた方向に沿って順次積層された初期第1パッシベーションコンタクト構造及び誘電体層を形成することと、
前記誘電体層に第1開口を形成するように前記誘電体層に対してパターニング工程を行うことであって、前記第1開口が前記非金属パターン領域に正対することと、
前記非金属パターン領域の基板表面及び前記金属パターン領域の基板表面を形成するように、前記第1開口に沿って前記初期第1パッシベーションコンタクト構造及び前記非金属パターン領域の基板の初期表面をエッチングすることであって、前記非金属パターン領域の基板表面が隣接する第1領域と第2領域を備え、前記第2領域の基板表面が前記金属パターン領域の基板に隣接し、前記第1領域の基板表面が前記金属パターン領域の基板表面よりも低く、前記第2領域の基板表面が前記第1領域の基板表面よりも低くなくかつ前記金属パターン領域の基板表面より高くなく、残りの前記初期第1パッシベーションコンタクト構造が前記第1パッシベーションコンタクト構造を形成することと、
前記基板内にドーピング層を形成するように、前記第1領域及び前記第2領域の基板表面に対してドーピング工程を行うことと、
前記誘電体層を除去することと、を含む、
ことを特徴とする太陽電池の製造方法。 - 前記誘電体層に対してパターニング工程を行うことは、
前記非金属パターン領域の前記誘電体層を除去するようにレーザー工程で前記非金属パターン領域の誘電体層をレーザー加工し、前記第1開口を形成し、前記第1開口によって前記非金属パターン領域の前記初期第1パッシベーションコンタクト構造を露出させることを含む、
ことを特徴とする請求項18に記載の太陽電池の製造方法。 - 前記誘電体層に対してパターニング工程を行うことは、
前記金属パターン領域の誘電体層上面に前記金属パターン領域に正対するインク層を形成することと、前記非金属パターン領域の誘電体層を除去するように前記誘電体層を酸洗処理し、前記第1開口を形成し、前記第1開口によって前記非金属パターン領域の前記初期第1パッシベーションコンタクト構造を露出させることと、を含む、
ことを特徴とする請求項18に記載の太陽電池の製造方法。 - 前記第1領域及び前記第2領域の基板表面に対してドーピング工程を行うことは、
前記第1領域及び前記第2領域の基板内に前記ドーピング元素を拡散させ、あらかじめ設定された厚さを持つ初期ドーピング層を形成するように、前記第1領域及び前記第2領域の基板表面にドーピング元素を注入することと、
前記ドーピング層を形成するように、前記初期ドーピング層に対してアニール工程を行うことと、を含む、
ことを特徴とする請求項18に記載の太陽電池の製造方法。 - 前記第1領域のドーピング層の前記第1パッシベーションコンタクト構造に向かう側から、前記第1領域のドーピング層の前記第1パッシベーションコンタクト構造から離れた側に向かう方向において、前記第2領域のドーピング層のドーピング元素濃度が次第に減少する、
ことを特徴とする請求項21に記載の太陽電池の製造方法。
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