JP6029023B2 - 太陽電池、太陽電池モジュール及び太陽電池の製造方法 - Google Patents
太陽電池、太陽電池モジュール及び太陽電池の製造方法 Download PDFInfo
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Description
(太陽電池1aの構成)
図1に示されるように、太陽電池1aは、受光面10a及び裏面10bを有する光電変換部10を有する。光電変換部10は、基板11を備えている。基板11は、半導体材料からなる。基板11は、例えば、結晶シリコンなどの結晶半導体等により構成することができる。基板11は、一の導電型を有する。具体的には、本実施形態では、基板11の導電型がn型である例について説明する。
次に、太陽電池1aの製造方法の一例について説明する。
図2は、第1の実施形態における太陽電池モジュールの略図的断面図である。図2に示されるように、太陽電池モジュール2は、太陽電池1aを備えている。太陽電池1aは、樹脂封止材30によって封止されている。樹脂封止材30の受光面10a側には、受光面側保護部材31が配されている。一方、樹脂封止材30の裏面10b側には、裏面側保護部材32が配されている。
図3は、第2の実施形態における太陽電池1bの略図的断面図である。図3に示されるように、第2の実施形態における太陽電池1bは、第1の実施形態における太陽電池1aと、光電変換部10の構成において異なる。以下、本実施形態における光電変換部10の構成について説明する。
図4は、第3の実施形態における太陽電池1cの略図的断面図である。図4に示されるように、太陽電池1cでは、絶縁層23がp側電極21p及びn側電極22nよりも突出している。絶縁層23が、樹脂等の弾性体により構成されている。このため、図5に示されるように、複数の太陽電池1cを積層した場合、隣り合う太陽電池1cに接触するのは、弾性体により構成された絶縁層23のみである。太陽電池1cの絶縁層23以外の部分が隣り合う太陽電池1cに接触することが抑制されている。従って、樹脂シート等を介在させずに複数の太陽電池1cを積層した場合であっても、太陽電池1cが損傷することを抑制することができる。その結果、太陽電池1cの保存が容易となり、太陽電池モジュール2の製造コストも低減し得る。
図6は、第4の実施形態における太陽電池1dの略図的断面図である。太陽電池1cでは、絶縁層23がp側電極21p及びn側電極22nの形成前に形成される。それに対して、太陽電池1dでは、絶縁層23がp側電極21p及びn側電極22nの形成後に形成される。このような場合であっても第3の実施形態において説明した効果と同様の効果が奏される。
2…太陽電池モジュール
10…光電変換部
10a…受光面
10b…裏面
10bn…n型表面
10bp…p型表面
11…基板
12n…半導体層
13…反射抑制層
14p…半導体層
17…第1のシード層
18…第2のシード層
21p…p側電極
22n…n側電極
23…絶縁層
23a…絶縁層の表面
30…樹脂封止材
Claims (7)
- 一主面にp型表面とn型表面とを有する光電変換部と、
前記p型表面の上に配され、めっき膜を含むp側電極と、
前記p型表面と前記p側電極との間に配された第1のシード層と、
前記n型表面の上に配され、めっき膜を含むn側電極と、
前記n型表面と前記n側電極との間に配された第2のシード層と、
前記p側電極と前記n側電極との間に配されており、隣り合う前記第1のシード層の端部と前記第2のシード層の端部とに跨がって設けられ、表面が凸状である絶縁層と、
を備える、太陽電池。 - 前記光電変換部は、
半導体材料からなる基板と、
前記基板の一主面の上に配されており、前記p型表面を構成しているp型アモルファスシリコン層と、
前記基板の一主面の上に配されており、前記n型表面を構成しているn型アモルファスシリコン層と、
を有する、請求項1に記載の太陽電池。 - 前記絶縁層が弾性体により構成されており、
前記絶縁層が前記p側電極及びn側電極から突出している、請求項1または2に記載の太陽電池。 - 請求項1〜3のいずれか一項に記載の太陽電池と、
前記太陽電池を封止している樹脂封止材と、
を備え、
前記絶縁層が樹脂を含む、太陽電池モジュール。 - 一主面にp型表面とn型表面とを有する光電変換部を準備する工程と、
前記p型表面の上に第1のシード層を形成すると共に、前記n型表面の上に第2のシード層を形成する工程と、
前記第1のシード層及び前記第2のシード層を形成した後に、前記光電変換部の一主面の前記p型表面と前記n型表面との境界部の上に、前記p型表面が露出した部分と、前記n型表面が露出した部分とが区画され、隣り合う前記第1のシード層の端部と前記第2のシード層の端部とに跨がるように絶縁層を形成する工程と、
前記絶縁層を形成した後に、めっき法により、前記p型表面の上にp側電極を形成すると共に、前記n型表面の上にn側電極を形成する工程と、
をさらに備える、太陽電池の製造方法。 - 前記絶縁層を、表面が凸状となるように形成する、請求項5に記載の太陽電池の製造方法。
- 前記絶縁層をエポキシ樹脂を含むレジスト材料により形成する、請求項5または6に記載の太陽電池の製造方法。
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