Printed and organic electronics has generated growing interest over the last decade or so, based on the promise of low-cost, large area manufacturing of flexible electronics products that can be either sold as is or incorporated into other objects such as packaging or even textiles. The range of functions can include such areas as light emission in OLEDs [1], energy conversion in organic solar modules (OPV) [2], memories [3], radio frequency identification (RFID) [4], and sensors [5], for example, and some these applications, e.g. OLEDs and OPV, are already in the market, for example in mobile phone displays and bags with integrated solar battery chargers [6]. While there is a massive amount of literature on OLEDs, OPV and organic thin film transistors (OTFTs), rectifying diodes seem to have received less attention. However, rectifying diodes can be important components in RFID and can be used in other applications as well, e.g. display backplanes. At Tampere University of Technology we have been studying rectifying diodes made using only large-volume compatible processes such as gravure printing. In this talk we will present some of the key results of our work to date, especially on the effect of printing on interfaces and device performance and improvements in radio frequency rectification.
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