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Challenges and Progress in Organic RFID

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Organic and polymer logic is being pursued for low-cost and large-area applications. One of these applications may be low-cost, possibly disposable, RFID tags. Such RFID tags can, at a later stage, be equipped with sensors, turning them into “smart labels”. Such tags and labels would transmit information from a memory and/or a sensor to a base station. At IMEC , we presently focus on two aspects of this application. The first is the realization of circuit blocks that function at a reasonably low supply voltage and power. This will be needed to achieve sufficient reading distance for the tags. The second aspect concerns the generation and management of the power supply. In our approach, the tags are autonomous and passive, i.e. they do not include a battery. In that case, a rectifier is required to produce the supply voltage of the circuit from the received RF carrier. We fabricate rectifiers by integrating organic capacitors and vertical organic diodes. The diodes consist of a stack of Au/pentacene/Al. Recently, we have shown operation of organic-diode-based rectifiers at frequencies up to 50 MHz [1]. In this seminar, we will show the progress that has recently been achieved with these rectifiers. [1] S. Steudel et al., “50 MHz rectifier based on an organic diode”, Nat. Mater., vol. 4, no. 8, pp. 597-600 (2005)

This talk is part of the Optoelectronics Group series.

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