Organic thin-film solar cells

An organic thin film solar cell having improved photoelectric conversion efficiency. An embodiment of an organic thin film solar cell 100 includes a first electrode 102, an electron transport layer 103 comprising a metal oxide, a photoelectric conversion comprising a self-assembled monolayer 104, p-type semiconductor and the n-type semiconductor It comprises a layer 105 and a second electrode 106,. Self-assembled monolayer is formed of a material containing a fullerene-containing compound having an adsorptive group to the fullerene part and a metal oxide consisting of a fullerene or a fullerene derivative. The fullerene part an adsorptive group, a divalent aromatic hydrocarbon group, and the main chain carbon single bonds have been one or more 18 or less chain structure, or the oxygen some of the carbon, nitrogen, and which is attached via a divalent organic group having a backbone substituted with at least one element selected from the group consisting of sulfur. .FIELD 1