New one-pot poly(3,4-ethylenedioxythiophene): poly(tetrahydrofuran) memory material for facile fabrication of memory organic electrochemical transistors

Winther‐Jensen, Bjorn; Kolodziejczyk, Bartlomiej; Winther‐Jensen, Orawan

doi:10.1063/1.4900889

Cited by 21 publications

(18 citation statements)

References 23 publications

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“…In this work, we use volatile PEDOT:PSS devices in order to provide the simplest demonstration of global gating. Other PEDOT-based derivatives that exhibit memory phenomena 11 47 , can be used to introduce long-term-memory phenomena and lead to more complex network behaviours. Moreover, the performance of the architecture discussed here can be tuned through the use of anisotropic ionic conductors 48 as global electrolytes, which are expected to define spatial- or directional-dependent soft connection weights.…”

Section: Discussionmentioning

confidence: 99%

Neuromorphic device architectures with global connectivity through electrolyte gating

2017

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Information processing in the brain takes place in a network of neurons that are connected with each other by an immense number of synapses. At the same time, neurons are immersed in a common electrochemical environment, and global parameters such as concentrations of various hormones regulate the overall network function. This computational paradigm of global regulation, also known as homeoplasticity, has important implications in the overall behaviour of large neural ensembles and is barely addressed in neuromorphic device architectures. Here, we demonstrate the global control of an array of organic devices based on poly(3,4ethylenedioxythiophene):poly(styrene sulf) that are immersed in an electrolyte, a behaviour that resembles homeoplasticity phenomena of the neural environment. We use this effect to produce behaviour that is reminiscent of the coupling between local activity and global oscillations in the biological neural networks. We further show that the electrolyte establishes complex connections between individual devices, and leverage these connections to implement coincidence detection. These results demonstrate that electrolyte gating offers significant advantages for the realization of networks of neuromorphic devices of higher complexity and with minimal hardwired connectivity.

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Section: Discussionmentioning

confidence: 99%

Neuromorphic device architectures with global connectivity through electrolyte gating

2017

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“…that exhibited a hysteresis effect in their OECT characteristics. 57 The hysteresis was attributed to a conformational change of the polymer structure during redox cycling and was used to demonstrate a non-volatile memory device.…”

Section: Methodsmentioning

confidence: 99%

Organic electrochemical transistors

et al. 2018

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Organic electrochemical transistors (OECTs) leverage ion injection from an electrolyte into an organic semiconductor film to yield compelling advances in biological interfacing, printed logic circuitry and neuromorphic devices. Their defining characteristic is the coupling between electronic and ionic charges within the volume of an organic film. In this review we discuss the mechanism of operation and the 2 materials that are being used, overview the various form factors, fabrication technologies and proposed applications, and take a critical look at the future of OECT research and development.

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“…Using suitable PEDOT derivatives for the implementation of the OECT channel, the simple short-term functions can be further enhanced with long-term memory behavior. [ 42 ] Even though spatiotemporal correlation of different input spikes can be generated with multigated synaptic transistors, [ 17 ] the implementation of biological learning processes similar to STDP demands the development of OECTs with nonvolatile behavior. Multigated OECTs with long-term memory behavior can be used for the realization of STDP.…”

Section: Communicationmentioning

confidence: 99%