Photocontrolled organic field effect transistors based on the fullerene C₆₀ and spiropyran hybrid molecule

Photocontrolled organic field-effect transistors (OFETs) containing a hybrid compound of fullerene C₆₀ (n-semiconductor) with spiropyran (electrical conductivity photocontroller) as the active layer were fabricated for the first time. It was found that an OFET based on the hybrid compound, unlike the multilayer transistor (a device based on unmodified fullerene C₆₀ and spiropyran in different layers), has higher transfer characteristics (source-to-drain current), charge carrier mobility in the active layer, and response rate to external influence, which makes them promising materials for the manufacture of optical memory elements.