Laminate, organic thin-film solar cell, method for producing laminate, and method for producing organic thin-film solar cell

A laminate serving as a light-transmissive electrode layer and an electron transport layer of an organic thin-film solar cell including the light-transmissive electrode layer, the electron transport layer, an organic semiconductor layer, a hole transport layer and a collector electrode layer in this order, the laminate comprising:

• a member that serves as the light-transmissive electrode layer;
• and
• a titanium oxide layer that is disposed on the member serving as the light-transmissive electrode layer and serves as the electron transport layer,
• wherein the titanium oxide layer has a thickness of not less than 1.0 nm and not more than 60.0 nm, and the titanium oxide layer satisfies Condition 1 or Condition 2 below:
• Condition 1
• metallic indium and indium oxide are contained,
• InM/Ti is not less than 0.10 and not more than 0.25 in atomic ratio, and
• InOx/Ti is not less than 0.50 and not more than 10.00 in atomic ratio,
• where an elemental titanium content is represented by “Ti,” a metallic indium content is represented by “InM,” and an indium oxide content is represented by “InOx”;
• Condition 2
• metallic tin and tin oxide are contained,
• SnM/Ti is not less than 0.05 and not more than 0.30 in atomic ratio, and
• SnOx/Ti is not less than 0.50 and not more than 10.00 in atomic ratio,
• where an elemental titanium content is represented by “Ti,” a metallic tin content is represented by “SnM,” and a tin oxide content is represented by “SnOx.”