Abstract

The present invention aims to provide an organic thin-film solar cell that has a high photoelectric conversion efficiency and excellent durability. The present invention is an organic thin-film solar cell including a photoelectric conversion layer, wherein the photoelectric conversion layer includes a portion containing a sulfide of a Group 15 element in the periodic table and an organic semiconductor portion contacting with each other, and the organic semiconductor portion comprises an organic semiconductor, the organic semiconductor comprising a polythiophene derivative, a phthalocyanine derivative, a naphthalocyanine derivative, or a benzoporphyrin derivative.

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