Abstract: An object of the present invention is to provide a photoelectric conversion element, a solar cell and a solar cell module with improved photoelectric conversion efficiency. The object is achieved with a photoelectric conversion element comprising a pair of electrodes, an active layer disposed between the electrodes and an electron extraction layer disposed between at least one of the electrodes and the active layer, wherein the active layer contains a copolymer having a repeating unit represented by General Formula (1) below, and the electron extraction layer contains a compound represented by General Formula (E1) below.

Abstract: There is provides a photoelectric conversion device material which can be used as an electrode buffer material for a solar cell or the like and can improve durability while maintaining the interaction with an electrode and mobility; a photoelectric conversion device using the photoelectric conversion device material; and a solar cell using the photoelectric conversion device. A photoelectric conversion device containing a buffer layer and an active layer, wherein the buffer layer contains a compound represented by the following general formula (I), the active layer contains an n-type semiconductor, and the n-type semiconductor is a compound having a solubility in toluene of 0.5% by weight or more at 25° C. and having an electron mobility of 1.0×10?6 cm2/Vs or more.