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HL: Fachverband Halbleiterphysik

HL 5: Organic semiconductors I (joint session HL/CPP)

HL 5.1: Vortrag

Montag, 16. März 2020, 09:30–09:45, POT 112

Towards a plastic brain — •Matteo Cucchi, Hans Kleemann, Hsin Tseng, Alexander Lee, and Karl Leo — Dresden Integrated Center for Applied Physics and Photonic Materials (IAPP), Technische Universität Dresden, 01062 Dresden, Germany

Interconnectivity, fault tolerance and dynamic evolution of the circuitry have been long sought-after objectives of bio-inspired electronics and engineering. The massive parallelization of the neuronal circuitry grants the human brain superior efficiency and capabilities in cognitive learning and pattern recognition compared to digital, transistor-based machines. Here, we developed a technique to grow conductive networks and artificial synapses based on organic semiconductors. Their dendritic growth, stimulated by an AC signal, resembles the formation of new synapses in the nervous system (synaptogenesis). Moreover, their functions in saline solution emulate numerous brain features over multiple orders of magnitude in the time domain, such as learning, forgetting, time-dependent-spiking plasticity, and Pavlovian conditioning. We employ the artificial synapses to show a new device-concept capable of recognizing numerical patterns and explore possible pathways towards biocompatibility, neuroprosthetics and brain-inspired computing.