Abstract
A write-once read-many-times (WORM) memory device based on two layers of electroactive polymers sandwiched between an aluminum electrode and an indium-tin-oxide (ITO) electrode was fabricated. The electroactive polymer bilayer consisted of a conjugated copolymer film of 9,9-dihexylfluorene and Eu-complexed benzoate (P6FBEu) and a composite film of soluble self-aligned carbon nanotubes/polyaniline . At CNT contents above , the bilayer WORM memory device exhibited a low turn-on voltage of and a high ON/OFF current ratio of , in comparison to a turn-on voltage of and an ON/OFF current ratio of for the corresponding CNT-free bilayer device. The ON and OFF states endured up to read cycles at a read voltage of . The introduction of the composite film as an electroactive layer in the memory device has resulted in a reduction in switching voltage, as well as an increase in ON/OFF current ratio, compared to those of the CNT-free single-layer and bilayer devices.
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