Pre-synaptic DC bias controls the plasticity and dynamics of three-terminal neuromorphic electrolyte-gated organic transistors. Issue 1 (1st March 2023)

• Record Type: Journal Article
• Authors: Rondelli, Federico; Salvo, Anna De; Sebastianella, Gioacchino Calandra; Murgia, Mauro; Fadiga, Luciano; Biscarini, Fabio; Lauro, Michele Di
• Is Part Of: Neuromorphic computing and engineering. Volume 3:Issue 1(2023)
• Publication Date: 2023-03-01
• Subjects: organic neuromorphic electronics -- electrolyte-gated organic transistor -- paired-pulse plasticity -- PEDOT:PSS; Neural networks (Computer science) -- Periodicals; Neural computers -- Periodicals; Neuromorphics -- Periodicals; 006.3
• DOI: 10.1088/2634-4386/acb37f
• Languages: English
• ISSNs: 2634-4386

Abstract

Abstract: The role of pre-synaptic DC bias is investigated in three-terminal organic neuromorphic architectures based on electrolyte-gated organic transistors—EGOTs. By means of pre-synaptic offset it is possible to finely control the number of discrete conductance states in short-term plasticity experiments, to obtain, at will, both depressive and facilitating response in the same neuromorphic device and to set the ratio between two subsequent pulses in paired-pulse experiments. The charge dynamics leading to these important features are discussed in relationship with macroscopic device figures of merit such as conductivity and transconductance, establishing a novel key enabling parameter in devising the operation of neuromorphic organic electronics.