Memory stabilities and mechanisms of organic bistable devices with a phase-separated poly( methylmethacrylate )/poly(3-hexylthiophene) hybrid layer

摘要

Organic bistable devices (OBDs) with a poly(methylmethacrylate) (PMMA)/poly(3-hexyl-thiophene) (P3HT) hybrid layer, acting as a charge storage region, formed by using a vertical phase self-separation method were fabricated. The current-voltage curves of the Al/ P3HT/PMMA/indium-tin-oxide devices exhibited current bistabilities with a maximum ON/OFF ratio of 1 × 10~4. The write-read-erase-read sequence results demonstrated the switching characteristics of the OBDs. The cycling endurance number of the ON/OFF switching for the OBD was above 1 × 10~5. The memory characteristics of the OBDs were attributed to trapping and detrapping processes of electrons into and out of the P3HT/ PMMA heterointerfaces.