A new transistor based on organic materials has been developed by scientists at Linköping University. It has the ability to learn, and is equipped with both short-term and long-term memory. The work is a major step on the way to creating technology that mimics the human brain.
The transistor channel has not been constructed using the most common polymer used in organic electronics, PEDOT, but instead using a polymer of a newly-developed monomer, ETE-S, produced by Roger Gabrielsson, who also works at the Laboratory of Organic Electronics and is one of the authors of the article. ETE-S has several unique properties that make it perfectly suited for this application - it forms sufficiently long polymer chains, is water-soluble while the polymer form is not, and it produces polymers with an intermediate level of doping. The polymer PETE-S is produced in its doped form with an intrinsic negative charge to balance the positive charge carriers (it is p-doped).
The research has been financed by, among other sources, the Knut and Alice Wallenberg Foundation, Vinnova, the Swedish Research Council and the Swedish Foundation for Strategic Research.
An Evolvable Organic Electrochemical Transistor for Neuromorphic Applications, Jennifer Y Gerasimov, Roger Gabrielsson, Robert Forchheimer, Eleni Stavrinidou, Daniel T Simon, Magnus Berggren and Simone Fabiano, Linköping University, Advanced Science 2018. DOI 10.1002/advs.201801339
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