Organic thin film solar cell

An organic thin film solar cell comprising:

• a pair of electrodes at least one of which has optical transparency;
• and
• a photoelectric conversion layer arranged between the pair of electrodes, wherein:
• the photoelectric conversion layer comprises a multilayer film formed by a first electron-donating organic semiconductor thin film and a first electron-accepting thin film which are alternately stacked,
• the first electron-donating organic semiconductor thin film is composed of organic semiconductor molecules in which cyclic compounds are bound in a linear fashion,
• the first electron-donating organic semiconductor thin film and the first electron-accepting thin film each have a film thickness of 10 nm or less,
• the organic semiconductor molecules are an acene-based molecule compound represented by the following formula (I):
• C6+4(n−1)H6+2(n−1) (1)
• where n represents an integer of 2 or more,
• the multilayer film of the photoelectric conversion layer includes a superlattice structure,
• the multilayer film further comprises an intermediate organic semiconductor layer provided between the first electron-donating organic semiconductor thin film and the first electron-accepting thin film,
• the intermediate organic semiconductor layer has a thickness of 2 nm to 4 nm,
• the intermediate organic semiconductor layer is a third electron-donating organic semiconductor thin film having a band gap smaller than the first electron-donating organic semiconductor thin film adjacent to the intermediate organic semiconductor layer.

An organic thin film solar cell comprising:

• a pair of electrodes at least one of which has optical transparency;
• and
• a photoelectric conversion layer arranged between the pair of electrodes, wherein:
• the photoelectric conversion layer comprises a multilayer film formed by a first electron-donating organic semiconductor thin film and a first electron-accepting thin film which are alternately stacked,
• the first electron-donating organic semiconductor thin film is composed of organic semiconductor molecules in which cyclic compounds are bound in a linear fashion,
• the first electron-donating organic semiconductor thin film and the first electron-accepting thin film each have a film thickness of 10 nm or less,
• the organic semiconductor molecules are an acene-based molecule compound represented by the following formula (I):
• C6+4(n−1)H6+2(n−1) (1)
• where n represents an integer of 2 or more,
• the multilayer film of the photoelectric conversion layer includes a superlattice structure,
• the multilayer film further comprises an intermediate organic semiconductor layer provided between the first electron-donating organic semiconductor thin film and the first electron-accepting thin film,
• the intermediate organic semiconductor layer has a thickness of 2 nm to 4 nm, and
• the intermediate organic semiconductor layer is an electron-accepting organic semiconductor thin film having a band gap smaller than the first electron-accepting thin film adjacent to the intermediate organic semiconductor layer.