JP5850055B2 - 太陽電池と該太陽電池の製造方法 - Google Patents
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- H01L31/0248—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies
- H01L31/0352—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their shape or by the shapes, relative sizes or disposition of the semiconductor regions
- H01L31/035236—Superlattices; Multiple quantum well structures
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- H01L31/035209—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by their semiconductor bodies characterised by their shape or by the shapes, relative sizes or disposition of the semiconductor regions comprising a quantum structures
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Description
2、25 陰極
3、23 電子輸送層
4、24 量子ドット配列層
5、26 量子ドット層
6、27 正孔輸送層
7、28 陽極
8a、8b、29a、29b 取出電極
11 伝導帯
12 価電子帯
Claims (15)
- 量子ドットの集合体からなる量子ドット層が、電子輸送層と正孔輸送層との間に介在され、前記量子ドット層で太陽光を吸収する太陽電池であって、
陰極が基板上に形成されると共に、前記陰極の主面上に前記電子輸送層、グラフェン系材料からなる量子ドット配列層、前記量子ドット層、前記正孔輸送層、及び透光性材料からなる陽極が順次形成され、かつ前記陽極の少なくとも一部が表面露出するように該陽極上に取出電極が形成され、
前記量子ドット層は、前記量子ドットがシリコンクラスター粒子で形成されると共に、該シリコンクラスター粒子が三次元的に周期配列されてなり、
前記シリコンクラスター粒子は、平均粒径が3nm以下であり、前記シリコンクラスター粒子同士の粒子間距離が1nm以下であることを特徴とする太陽電池。 - 前記基板は、石英ガラス、無アルカリガラス、ホウケイ酸ガラス、アルミナ、ガリウム砒素、シリコン及びシリコンカーバイドを含む群から選択される材料で形成されることを特徴とする請求項1記載の太陽電池。
- 前記電子輸送層は、n型シリコン系材料で形成されていることを特徴とする請求項1又は請求項2記載の太陽電池。
- 量子ドットの集合体からなる量子ドット層が、電子輸送層と正孔輸送層との間に介在され、前記量子ドット層で太陽光を吸収する太陽電池であって、
前記電子輸送層が、単結晶又は多結晶のn型シリコン系基板で形成され、
前記電子輸送層の一方の主面上にグラフェン系材料からなる量子ドット配列層、前記量子ドット層、前記正孔輸送層、及び透光性材料からなる陽極が順次形成され、かつ前記陽極の少なくとも一部が表面露出するように該陽極上に取出電極が形成されると共に、前記電子輸送層の他方の主面上に陰極が形成され、
前記量子ドット層は、前記量子ドットがシリコンクラスター粒子で形成されると共に、該シリコンクラスター粒子が三次元的に周期配列されてなり、
前記シリコンクラスター粒子は、平均粒径が3nm以下であり、前記シリコンクラスター粒子の粒子間距離が1nm以下であることを特徴とする太陽電池。 - 前記電子輸送層の前記他方の主面に所定パターンの絶縁膜が形成されると共に、
前記陰極は、一部が前記電子輸送層に接合するように前記絶縁膜を介して前記他方の主面側に形成されていることを特徴とする請求項4記載の太陽電池。 - 前記量子ドット層は、価電子帯と伝導帯との間の中間エネルギー準位を有する多重エネルギー準位構造を備えていることを特徴とする請求項1乃至請求項5のいずれかに記載の太陽電池。
- 前記正孔輸送層は、p型シリコン系材料で形成されていることを特徴とする請求項1乃至請求項6のいずれかに記載の太陽電池。
- 前記陰極は、Alを主成分とすると共に、Nd、Ta、及びCuから選択された少なくとも1種の不純物を含有し、
かつ、前記不純物の含有量は、0.01〜3at%であることを特徴とする請求項1乃至請求項7のいずれかに記載の太陽電池。 - 前記陽極は、酸化物透明導電膜、グラフェン、及びナノワイヤの網状組織からなる透明導電膜のうちのいずれかで形成されていることを特徴とする請求項1乃至請求項8のいずれかに記載の太陽電池。
- 量子ドットの集合体からなる量子ドット層を、電子輸送層と正孔輸送層との間に介在させ、前記量子ドット層で太陽光を吸収する太陽電池の製造方法であって、
基板表面に陰極を形成した後、該陰極の表面に電子輸送層を形成し、
次いで、前記電子輸送層の表面にグラフェン系材料からなる量子ドット配列層を形成し、
次いで、平均粒径が3nm以下のシリコンクラスター粒子を、粒子間距離が1nm以下となるように、前記量子ドット配列層の表面に三次元的に周期配列させて前記量子ドット層を形成し、
その後、前記量子ドット層の表面に正孔輸送層を形成し、
次いで、透光性材料からなる陽極を前記正孔輸送層の表面に形成し、
さらに、前記陽極の少なくとも一部が表面露出するように該陽極上に取出電極を形成することを特徴とする太陽電池の製造方法。 - 前記電子輸送層をn型シリコン系材料で形成することを特徴とする請求項10記載の太陽電池の製造方法。
- 量子ドットの集合体からなる量子ドット層を、電子輸送層と正孔輸送層との間に介在させ、前記量子ドット層で太陽光を吸収する太陽電池の製造方法であって、
単結晶又は多結晶のn型シリコン系基板を電子輸送層とし、
前記電子輸送層の表面にグラフェン系材料からなる量子ドット配列層を形成し、
平均粒径が3nm以下のシリコンクラスター粒子を、粒子間距離が1nm以下となるように前記量子ドット配列層の一方の主面上に三次元的に周期配列させて前記量子ドット層を形成し、
次いで、前記量子ドット層の表面に正孔輸送層を形成し、
その後、透光性材料からなる陽極を前記正孔輸送層の表面に形成し、
さらに、前記陽極の少なくとも一部が表面露出するように該陽極上に取出電極を形成する一方、
前記電子輸送層の他方の主面上に陰極を形成し、前記電子輸送層と前記陰極とを接合させることを特徴とする太陽電池の製造方法。 - 前記電子輸送層の前記他方の表面に所定パターンの絶縁膜を形成した後、一部が前記電子輸送層と接合するように前記絶縁膜の表面に前記陰極を形成することを特徴とする請求項12記載の太陽電池の製造方法。
- 前記量子ドット層を形成した後の一連の処理を、200℃以下の処理温度で行うことを特徴とする請求項10乃至請求項13のいずれかに記載の太陽電池の製造方法。
- 前記正孔輸送層をp型シリコン系材料で形成することを特徴とする請求項10乃至請求項14のいずれかに記載の太陽電池の製造方法。
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