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Megahertz Organic Thin-Film Transistors for Flexible Biomedical Systems


Project description

The goals of this project are the optimization of organic thin-film transistors (TFTs) and the advancement of organic-TFT-based analog and mixed-signal circuit design to enable the realization of low-power biomedical systems on flexible polymeric substrates. A special focus is on neural interfaces, such as cochlea implants. For this purpose, the factors that currently limit the cutoff frequencies of flexible low-voltage organic TFTs with channel lengths of 1μm to about 1MHz for p-channel TFTs and 100 kHz for n-channel TFTs will be investigated by numerical simulations. The results of these simulations will be used to optimize all critical aspects of the TFT fabrication process, such as channel length, gate overlap, semiconductor thickness and contact doping, with the goal of increasing the cutoff frequencies of both p-channel and n-channel organic TFTs fabricated on plastic substrates beyond 1MHz. By taking advantage of high-resolution stencil masks for the device fabrication, TFTs with channel lengths well below 1μm can be manufactured. The design of analog and mixed-signal circuits, including frequency mixers, analog filters, voltage stabilization circuits, electrical references and neural stimulators, will be supported by the development of optimized DC and AC device models. The entire wireless system will be integrated on a flexible polymeric substrate.

Start/End of project

01.10.2015 until 30.09.2018

Project manager

Prof. Dr.-Ing. Y. Manoli

Contact person

Jun.-Prof. Dr.-Ing. Matthias Kuhl
Phone:+49 (0) 761 / 203 - 67560


Dr. Hagen Klauk, Max Planck Institute for Solid State Research Privatdozentin Dr.-Ing. Susanne Scheinert, Technical University of Ilmenau


DFG SPP 1796 „FFlexCom“
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