Unipolar bistable switching of organic non-volatile memory devices with poly(styrene-co-styrenesulfonic acid Na)

We demonstrated unipolar organic bistable memory devices with 8 × 8 cross-bar array type structure. The active material for the organic non-volatile memory devices is poly(styrene-co-styrenesulfonic acid Na) (PSSANa). From the electrical measurements of the PSSANa organic memory devices, we observed rewritable unipolar switching behaviors with a stable endurance and narrow cumulative probability. Also the PSSANa memory devices exhibited a uniform cell-to-cell switching with a high ON/OFF ratio of ∼10 ⁵ and good retention time of ∼10 ⁴ seconds without significant degradation.