Photoresponse and photo-induced memory effect in the organic field-effect transistor based on AlOX nanoparticles at the interface of semiconductor/dielectric

In this work, the photoresponse and photo-induced memory effect were demonstrated in an organic field-effect transistor (OFET) with semiconductor pentacene and SiO₂ as the active and gate dielectric layers, respectively. By inserting AlO_X nanoparticles (NPs) at the interface of pentacene/SiO₂, obvious enhancing photoresponse was obtained in the OFET with the maximum responsivity and photosensitivity of about 15 A/W and 100, respectively. Moreover, the stable photoinduced memory effect was achieved in the OFET, attributing to the photogenerated electrons captured by the interface traps of the AlO_X NPs/SiO₂.