JPWO2018207859A1 - 光電変換装置およびそれを備える太陽電池モジュール - Google Patents
光電変換装置およびそれを備える太陽電池モジュール Download PDFInfo
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Abstract
Description
この発明の実施の形態によれば、光電変換装置は、半導体基板と、第1の非晶質半導体層と、第2の非晶質半導体層と、第1の電極と、第2の電極と、第1の配線と、第2の配線とを備える。半導体基板は、第1の導電型を有する。第1の非晶質半導体層は、半導体基板の一方の面に配置され、第1の導電型を有する。第2の非晶質半導体層は、半導体基板の一方の面に配置され、第1の導電型と反対の第2の導電型を有する。第1の電極は、第1の非晶質半導体層に電気的に接続される。第2の電極は、第2の非晶質半導体層に電気的に接続される。第1の配線は、導電性接着層を介して第1の電極の一部に接続され、第1の電極に電気的に接続される。第2の配線は、導電性接着層を介して第2の電極の一部に接続され、第2の電極に電気的に接続される。そして、第1の電極は、第1の非晶質半導体層に接して配置され、主成分が銀である第1の導電層と、第1の導電層と第1の配線との間に配置され、銀よりも酸化され易い金属からなる第2の導電層とを含む。また、第2の電極は、第2の非晶質半導体層に接して配置され、主成分が銀である第3の導電層と、第3の導電層と第2の配線との間に配置され、銀よりも酸化され易い金属からなる第4の導電層とを含む。第2の導電層は、第1の配線に面している部分を含み、第4の導電層は、第2の配線に面している部分を含む。
構成1において、第2の導電層が第1の配線に直接接している構成と、第4の導電層が第2の配線に直接接している構成との少なくとも1つの構成を有する。
構成1または構成2において、第2の導電層が第1の配線よりも酸化され易い金属からなる構成と、第4の導電層が第2の配線よりも酸化され易い金属からなる構成との少なくとも1つの構成を有する。
構成1から構成3のいずれかにおいて、第2の導電層が第1の配線よりも硬度の高い金属からなる構成と、第4の導電層が第2の配線よりも硬度の高い金属からなる構成との少なくとも1つの構成を有する。
構成1から構成4のいずれかにおいて、第2および第4の導電層は、ニッケルを主たる成分とする。
また、この発明の実施の形態による太陽電池モジュールは、構成1から構成5のいずれかに記載の光電変換装置を備える太陽電池モジュールである。
図1は、実施の形態1による光電変換装置の平面図である。図2は、図1に示す線II−II間における光電変換装置の断面図である。図3は、図1に示す線III−III間における光電変換装置の断面図である。図4は、図1に示す線IV−IV間における光電変換装置の断面図である。なお、図1は、光入射側と反対側から見た光電変換装置の平面図である。
図8は、実施の形態2による光電変換装置の平面図である。図9は、図8に示す線IX−IX間における光電変換装置の断面図である。図10は、図8に示す線X−X間における光電変換装置の断面図である。図11は、図8に示す線XI−XI間における光電変換装置の断面図である。なお、図8は、光入射側と反対側から見た光電変換装置の平面図である。
図12は、実施の形態3による太陽電池モジュールの平面図である。なお、図12は、光入射側から見た太陽電池モジュールの平面図である。
(実施例1)
実施例1は、実施の形態1に従って、光電変換装置を作製し、その特性の評価を行った。作製について、以下に具体的に説明する。
(実施例2)
実施例2は、実施の形態2に従って、光電変換装置を作製し、その特性の評価を行った。
(実施例3)
実施例3は、実施の形態2に従って、光電変換装置を作製し、その特性の評価を行った。
<比較例1>
比較例1として、導電層52,62を設けずに作製した。
その他は、実施例1と同様に作製した。
<比較例2>
比較例2として、比較例1に対して、導電層51,61の下に接着層としてチタンの層を5nm、設けて作製した。
その他は、実施例1と同様に作製した。
<比較例3>
比較例3として、導電性接着層7をライン状に設けて、半導体基板1全体において、電極5,6と配線82,83の対向面の重なり部分の、おおむね、80%以上の面積とした。
Claims (6)
- 第1の導電型を有する半導体基板と、
前記半導体基板の一方の面に配置され、前記第1の導電型を有する第1の非晶質半導体層と、
前記半導体基板の一方の面に配置され、前記第1の導電型と反対の第2の導電型を有する第2の非晶質半導体層と、
前記第1の非晶質半導体層に電気的に接続された第1の電極と、
前記第2の非晶質半導体層に電気的に接続された第2の電極と、
導電性接着層を介して前記第1の電極の一部に接続された第1の配線と、
導電性接着層を介して前記第2の電極の一部に接続された第2の配線とを備え、
前記第1の電極は、
前記第1の非晶質半導体層に接して配置され、主成分が銀である第1の導電層と、
前記第1の導電層と前記第1の配線との間に配置され、前記銀よりも酸化され易い金属からなる第2の導電層とを含み、
前記第2の電極は、
前記第2の非晶質半導体層に接して配置され、主成分が銀である第3の導電層と、
前記第3の導電層と前記第2の配線との間に配置され、前記銀よりも酸化され易い金属からなる第4の導電層とを含み、
前記第2の導電層は、前記第1の配線に面している部分を含み、
前記第4の導電層は、前記第2の配線に面している部分を含む、光電変換装置。 - 前記第2の導電層が前記第1の配線に直接接している構成と、前記第4の導電層が前記第2の配線に直接接している構成との少なくとも1つの構成を有する、請求項1に記載の光電変換装置。
- 前記第2の導電層が前記第1の配線よりも酸化され易い金属からなる構成と、前記第4の導電層が前記第2の配線よりも酸化され易い金属からなる構成との少なくとも1つの構成を有する、請求項1または請求項2に記載の光電変換装置。
- 前記第2の導電層が前記第1の配線よりも硬度の高い金属からなる構成と、前記第4の導電層が前記第2の配線よりも硬度の高い金属からなる構成との少なくとも1つの構成を有する、請求項1から請求項3のいずれか1項に記載の光電変換装置。
- 前記第2および第4の導電層は、ニッケルを主たる成分とする、請求項1から請求項4のいずれか1項に記載の光電変換装置。
- 請求項1から請求項5のいずれか1項に記載の光電変換装置を備える太陽電池モジュール。
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