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Design of Novel Organic Thin Film Transistors for Wearable Nanoelectronics

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Final rept. 1 Sep 2008-31 Aug 2009

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This report results from a contract tasking Queen Mary University of London as follows This project aims to exploit macrocyclic compounds as electronic materials that are adaptable to production printing processes for thin film organic transistors with the ability to harness both electronic functionality and chemical and biosensing capabilities using surface modification. Phthalocyanine will be processed by solution printing methods, studying closely the morphology of the films under varying deposition parameters choice of solvent, viscosity, annealing for device optimisation. Novel electronic aspects of electropolymerisable and printable conjugated polymeric systems in varying mono through to multilayer thicknesses will be investigated studying i the effects of electric fields on charge transfer, charge separation, and recombination processes, ii the role of interfacial states on charge transport, iii the dependence of charge transport on supramolecular organisation, molecular aggregation and temperature annealing. The knowledge of in-plane and through plane conductivity will be useful for determining anisotropy in the transport mechanism. Low frequency current and voltage noise measurements will be carried out, providing quality assessment of the structures devised. Using advanced state of the art analytical facilities, nano-scale structural analysis of organised organic films includes the characterization of symmetry, size and orientation of grainsdomains with a view to correlating the physical properties of the films with micro-structural behaviour. A series of experiments will be performed to examine active life for electrical performance, chemical and environmental stability. Study of the phase diagram is necessary since the temperature effect and the electric field bias effect on the conductivity of the material may be correlated with phase transitions.

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  • Electrical and Electronic Equipment
  • Solid State Physics

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