Synaptic learning behavior based on a Ag/PEDOT:PSS/Ta memristor

In this paper, a memristor with structure of Ag/ PEDOT:PSS/ Ta was fabricated and measured at room temperature. The conductance of the device decreased continuously as the consecutive negative voltage scanning. But for positive voltage sweeping, the conductance value reduced initially then increased, which was quite different from previous reported experimental results. The relaxation phenomenon was observed under the consecutive voltage pulses, which can be used to achieve a synaptic learning behavior. It is found that the PEDOT:PSS layer was critical for the special characteristics.