Organic semiconductor composition, organic semiconductor element, and their manufacturing method

A semiconductor element which is a photosensor comprising an organic semiconductor layer and two or more electrodes contacting it or an organic thin-film transistor comprising a support, a gate electrode and a gate insulation layer provided on the support, an organic semiconductor layer provided on the gate insulation layer, and a source electrode and a drain electrode each contacting the organic semiconductor layer, wherein the organic semiconductor layer contains an organic semiconductor composition comprising particles of a metal, an inorganic oxide, an inorganic nitride or polymers and an organic semiconducting compound chemically combined through a substituent with the particles.