Inkjet Printed Large-Area Flexible Few-Layer Graphene Thermoelectrics


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Authors
Juntunen, T 
Jussila, H 
Ruoho, M 
Liu, S 
Hu, G 
Abstract

jats:titleAbstract</jats:title>jats:pGraphene‐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 mjats:sup−1</jats:sup> Kjats:sup−2</jats:sup>, 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.</jats:p>

Description
Keywords
graphene, inkjet printing, large-area thermoelectrics
Journal Title
Advanced Functional Materials
Conference Name
Journal ISSN
1616-301X
1616-3028
Volume Title
28
Publisher
Wiley
Sponsorship
Engineering and Physical Sciences Research Council (EP/L016087/1)
Royal Academy of Engineering (RAEng) (10216/105)
EPSRC (EP/L016087/1) Royal Academy of Engineering (Graphlex)