Inkjet Printed Large-Area Flexible Few-Layer Graphene Thermoelectrics

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Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2018-05-30
Major/Subject
Mcode
Degree programme
Language
en
Pages
Series
Advanced Functional Materials, Volume 28, issue 22
Abstract
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.
Description
| openaire: EC/H2020/645241/EU//TransFlexTeg | openaire: EC/FP7/631610/EU//GrabFast
Keywords
graphene, inkjet printing, large-area thermoelectrics
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Citation
Juntunen, T, Jussila, H, Ruoho, M, Liu, S, Hu, G, Albrow-Owen, T, Ng, L W T, Howe, R C T, Hasan, T, Sun, Z & Tittonen, I 2018, ' Inkjet Printed Large-Area Flexible Few-Layer Graphene Thermoelectrics ', Advanced Functional Materials, vol. 28, no. 22, 1800480 . https://doi.org/10.1002/adfm.201800480