From Event: SPIE Organic Photonics + Electronics, 2017
Thermoelectric generators (TEGs) transform heat to electricity without any movable parts. These devices are considered to be an important means of energy harvesting for wearables and sensor nodes for the Internet-of-Things (IoT). Organic semiconductors have recently demonstrated ZT-values approaching the same order of magnitude of those of the best established inorganic materials. Conjugated polymers as well as printable inorganic nanomaterials offer the unique advantage of being processable on printing machines. This opens a pathway for the fabrication of thermoelectric generators with unprecedented low costs thus enabling mass consumer applications. We have developed novel printable PEDOT formulations and a device layout which allow for a roll-to-roll printing process on ultrathin plastic foils. The TEGs are then subsequently fabricated by an automated folding process which allows to adapt the geometry of the devices such that the desired thermal resistance is optimum for the specific thermal boundary condition. Using this approach in combination with designed low power electronics forms the basis for several wireless sensor nodes.
Ulrich Lemmer, André Gall, Matthias Hecht, Silas Aslan, Frederick Lessmann, and Verena Schendel, "Hybrid electronic systems powered by printed thermoelectric generators (Conference Presentation)," Proc. SPIE 10366, Hybrid Memory Devices and Printed Circuits 2017, 103660B (Presented at SPIE Organic Photonics + Electronics: August 10, 2017; Published: 19 September 2017); https://doi.org/10.1117/12.2275383.5581151899001.
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