Zinc oxide laminate for an 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 zinc oxide layer that is disposed on the member serving as the light-transmissive electrode layer and serves as the electron transport layer,
• wherein the zinc oxide layer has a Zn deposition amount of not less than 20.0 mg/m2 and not more than 120.0 mg/m2, and
• when, in the zinc oxide layer, an oxygen 1s spectrum obtained by X-ray photoelectron spectroscopy is separated into three peaks, an area of a peak in which a binding energy of a peak top is in a range of not less than 529.0 eV and less than 530.7 eV is represented by α, and an area of a peak in which a binding energy of a peak top is in a range of not less than 530.7 eV and less than 532.2 eV is represented by β, an S value represented by Formula (1) is not more than 0.90:
• S
• =
• β
• /
• (
• α
• +
• β
• )
• .
• (
• 1
• )