Printed electronics is a new technology envisioning the fabrication of electronic devices using printing methodologies instead of conventional photolitography employed in the silicon industry. In this presentation I will describe the design rationale, synthesis, characterization, of several organic semiconducting polymers for printed thin-film transistors (TFTs) and photovoltaic cells (OPVs) and understand their charge-transport characteristics as a function of the device architecture/interface modifications (Fig. 1). Particularly I will descibe the realization of organic thin-film transistors with electron mobilities ＞ 3 cm2/Vs for printed devices and ＞ 7 cm2/Vs for single crystal-based devices. Furthermore, OPV cell with efficiencies ＞9% are demonstrated. Finally, new materials for light emitting transistors will be presented.
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