Resistive-switching memory effect of hybrid structures with polyimide and SnO ₂ nanocrystals

Hybrid memory devices with polyimide and SnO ₂ nanocrystals on a ?exible polyethersulphone substrate have shown a memristor behavior from current-voltage (I-V) measurements. The resistive-switching effects with a current bistability appeared during cycling voltage sweeping within the range of ±4 V. This I -V switching effect might have originated from a resistance ?uctuation due to the charge trapping into the SnO ₂ nanocrystals as well as the oxygen vacancies of the ZnO layer and aluminum oxides that were formed between the polyimide and the interface of the Al gate electrode. In the bipolar resistance-switching behavior, the ratio of the high-and low-resistance state currents was about 3.7 × 10 ⁴ at 1 V.