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Inkjet Printed Large-Area Flexible Few-Layer Graphene Thermoelectrics

Juntunen, T and Jussila, H and Ruoho, M and Liu, S and Hu, G and Albrow-Owen, T and Ng, LWT and Howe, RCT and Hasan, T and Sun, Z and Tittonen, I (2018) Inkjet Printed Large-Area Flexible Few-Layer Graphene Thermoelectrics. Advanced Functional Materials, 28. ISSN 1616-301X

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© 2018 The Authors. Published by WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim Graphene-based organic nanocomposites have ascended as promising candidates for thermoelectric energy conversion. In order to adopt existing scalable printing methods for developing thermostable graphene-based thermoelectric devices, optimization of both the material ink and the thermoelectric properties of the resulting films are required. Here, inkjet-printed large-area flexible graphene thin films with outstanding thermoelectric properties are reported. The thermal and electronic transport properties of the films reveal the so-called phonon-glass electron-crystal character (i.e., electrical transport behavior akin to that of few-layer graphene flakes with quenched thermal transport arising from the disordered nanoporous structure). As a result, the all-graphene films show a room-temperature thermoelectric power factor of 18.7 µW m−1 K−2, representing over a threefold improvement to previous solution-processed all-graphene structures. The demonstration of inkjet-printed thermoelectric devices underscores the potential for future flexible, scalable, and low-cost thermoelectric applications, such as harvesting energy from body heat in wearable applications.

Item Type: Article
Uncontrolled Keywords: graphene inkjet printing large-area thermoelectrics
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 21 Mar 2018 20:06
Last Modified: 04 Mar 2021 03:45
DOI: 10.1002/adfm.201800480