JP2024504761A - 太陽電池及び太陽電池の製造方法 - Google Patents
太陽電池及び太陽電池の製造方法 Download PDFInfo
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Abstract
Description
110:第1光電変換部
120、130:第2光電変換部
110a:接合層
42:第1電極
44:第2電極
Claims (20)
- 太陽電池であって、
第1光電変換部と、第2光電変換部と、第1電極と、第2電極とを含み、
前記第1光電変換部は、ペロブスカイト化合物を含む光電変換層と、前記光電変換層の一方側に位置する第1輸送層と、前記光電変換層の他方側に位置する第2輸送層とを含み、
前記第2光電変換部は、前記第1光電変換部の前記第2輸送層の下部に位置するとともに、前記第1光電変換部とは異なる物質または構造を有し、
前記第1電極は、前記第1光電変換部の受光面となる面において前記第1光電変換部に電気的に接続され、
前記第2電極は、前記第2光電変換部の下部において前記第2光電変換部に電気的に接続され、
前記第1光電変換部の表面には、少なくとも1つの滴下痕を有する、ことを特徴とする太陽電池。 - 前記光電変換層は、第1厚さ以上に形成される、ことを特徴とする請求項1に記載の太陽電池。
- 前記第1厚さは、200nm~1μmを満たす、ことを特徴とする請求項2に記載の太陽電池。
- 前記光電変換層は、積層方向に均一な組成を有するように形成される、ことを特徴とする請求項1に記載の太陽電池。
- 前記第1光電変換部の一方の面の長さは、12~17cmである、ことを特徴とする請求項1に記載の太陽電池。
- 太陽電池の製造方法であって、
ペロブスカイト化合物を含む光電変換層と、前記光電変換層の一方側に位置する第1輸送層と、前記光電変換層の他方側に位置する第2輸送層とを含む第1光電変換部を形成するステップと、
前記第1光電変換部の一方の面に、前記第1光電変換部に電気的に接続された第1電極を形成し、前記第1光電変換部の他方の面に、前記第1光電変換部に電気的に接続された第2電極を形成する電極形成ステップと、を含み、
前記第1光電変換部を形成するステップは、
前記ペロブスカイト化合物を構成する第1物質から第1成膜を形成するステップと、
前記第1成膜上に、前記ペロブスカイト化合物を構成する第2物質をスプレーコーティングして第2成膜を形成するステップと、
一次熱処理を行って第1成膜及び第2成膜を拡散させて前記ペロブスカイト化合物を形成するステップと、
前記ペロブスカイト化合物上に残留する前記第2成膜の一部を除去するための洗浄を行うステップと、を含む、ことを特徴とする太陽電池の製造方法。 - 前記第1成膜を形成するステップは、前記第1物質を真空蒸着して前記第1成膜を形成する、ことを特徴とする請求項6に記載の太陽電池の製造方法。
- 前記第2成膜を形成するステップは、
第3物質を溶媒として前記第2物質を溶解してスプレー溶液を作製するステップと、
前記スプレー溶液を前記第1成膜に噴射して前記第2成膜を形成するステップと、を含む、ことを特徴とする請求項7に記載の太陽電池の製造方法。 - 前記スプレー溶液は、前記第1成膜に少なくとも1回以上塗布される、ことを特徴とする請求項8に記載の太陽電池の製造方法。
- 前記第3物質が、常温で所定の粘度以下の粘度を有するアルコール性溶媒である、ことを特徴とする請求項9に記載の太陽電池の製造方法。
- 前記第3物質は、前記第2成膜の洗浄ステップにおいて前記第2物質を除去する洗浄剤に含まれる、ことを特徴とする請求項10に記載の太陽電池の製造方法。
- 前記第2成膜の一部を除去する洗浄の後に、前記光電変換層に対して二次熱処理を行うステップをさらに含む、ことを特徴とする請求項6に記載の太陽電池の製造方法。
- 前記二次熱処理ステップは、前記一次熱処理ステップと同じ温度及び同じ時間内で行われる、ことを特徴とする請求項12に記載の太陽電池の製造方法。
- 前記第2成膜を形成するステップは、前記スプレーコーティングにより基板表面に滴下痕を形成し、かつ前記滴下痕の境界に凹凸を形成する、ことを特徴とする請求項13に記載の太陽電池の製造方法。
- 前記洗浄ステップにおいて前記滴下痕の境界での凹凸の高さが低くなる、ことを特徴とする請求項14に記載の太陽電池の製造方法。
- 前記滴下痕の直径は、0.1~1000μmを満たす、ことを特徴とする請求項15に記載の太陽電池の製造方法。
- 前記第2成膜は、前記第2成膜の厚さと前記第1成膜の厚さとの和が前記光電変換層の厚さよりも大きくなるように過剰に形成される、ことを特徴とする請求項6に記載の太陽電池の製造方法。
- 前記第1成膜は、前記光電変換層の厚さに対して0.3~0.8倍を有するように形成される、ことを特徴とする請求項6に記載の太陽電池の製造方法。
- 前記第1光電変換部を形成するステップの前に、さらに、
前記第1光電変換部とは異なる物質または構造を有する第2光電変換部を形成するステップを含み、
前記第2光電変換部を形成するステップは、
半導体基板上に、前記半導体基板に対して別体形成された第1半導体層からなる第1導電領域と、前記半導体基板に対して別体形成された第1半導体層からなる第2導電領域とを形成するステップを含む、ことを特徴とする請求項6に記載の太陽電池の製造方法。 - 前記第2光電変換部上に接合層を形成するステップをさらに含み、
前記第1光電変換部を形成するステップにおいて、前記接合層上に位置する前記第2輸送層を形成し、前記第2輸送層上に前記光電変換層を形成し、前記光電変換層上に前記第1輸送層を形成する、ことを特徴とする請求項19に記載の太陽電池の製造方法。
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