Asymmetric and symmetric two-terminal PEDOT:PSS-electrolytic devices were fabricated and their electric response (current-voltage curve) was measured using an applied AC voltage source. The current-voltage curve for the symmetric devices was similar to a Bipolar Sigmoid function. By introducing asymmetry into the devices the current-voltage curve could be altered to resemble a linear ramp function. This work shows that the shape of the electrical response of these polymer devices can be used to implement activation transfer functions for artificial neurons, which are used to implement artificial neural networks.

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Keywords Activation functions, Artificial neuron, Conjugated polymer, Electro-ionic, PEDOT:PSS, Screen-printing
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Journal Organic Electronics: physics, materials, applications
Barrera Ramirez, E.A. (Eduardo A.), & McGarry, S. (2014). Geometric dependence in the electric response of electro-ionic polymer devices. Organic Electronics: physics, materials, applications, 15(6), 1131–1137. doi:10.1016/j.orgel.2014.03.014