Impact of scaling to the resistive switching effect in organic polymer – based structures

Abstract

The resistive switching effect has been studied in a set of organic polymer - based structures of a different composition and size scale from macro to micro. It is shown that scaling down reduces both the threshold switching voltage Vth and the respective effective electric field Eth. Furthermore, introduction of metal micro particles into a macro scale polymer matrix provides the same effect. Therefore the metal particle incorporation may be regarded as an alternative method of effective scaling, depending on an application. Switching speed of less than 15 ns, threshold voltage Vth ~ (2 – 25) V, 105 cycle endurance, no significant moisture dependence and high retention time 3.5 months for scaled down samples aswell as for metal doped macro samples have been demonstrated. These characteristics are suitable for constructing memory devices. The switching effect mechanisms are discussed.

In situ impedance spectroscopy of filament formation by resistive switches in polymer based structures

“…We performed RSE studies of materials based on commercially available polymer polystyrene, which is an isolating material and is soluble in organic solvents. As we showed before 8 , composite structures based on polystyrene allow to increase structure conductivity and to essentially reduce RSE voltage without deterioration of other characteristics. It was shown that introduction of nanoparticles into active matrix leads to enhancement of RSE reproducibility and lowers energy consumption 15 .…”

“…RSE is a drastic resistance change that occurs under application of critical electric field to a sample. RSE based on organic materials is nonvolatile, fast (switching time is less than 10 ns); has 10 5 cycles endurance, slow degradation and high scalability potential 8 . Moreover a possibility to achieve RSE between more than two states was demonstrated, which allows new possibilities for practical application 9 .…”