Spray-coated PEDOT:OTf films: thermoelectric properties and integration into a printed thermoelectric generator

Abstract

<p>Spray-coated highly conductive PEDOT material proves efficient for the fabrication of printed thermoelectric generators.</p>

Printed Thermoelectrics

“…Reproduced with permission. [ 196 ] Copyright 2020, RSC. c) Origami screen printed PEDOT:PSS/TiS 2 :hexylamine‐complex module: i) 2D print layout for an origami TEG with 254 p‐legs (blue) and 253 n‐legs (yellow), ii) screen printed TEG, iii) first folding step stacking all columns plus one extra strip of substrate, iv) fully folded thermoelectric ribbon, v) thermoelectric ribbon creased at the fold lines, vi) fully folded thermoelectric generator fixed with a Kapton ribbon.…”

“…b) Spray printed PEDOT:OTf thermoelectric composite: i) picture of 312 spray-coated legs on a 25 µm thick polyimide foil, ii) 3D TEG composed of 156 linked and rolled thermocouples (R = 2.9 KΩ). Reproduced with permission [196]. Copyright 2020, RSC.…”

Thermal and electrical cross-plane conductivity at the nanoscale in poly(3,4-ethylenedioxythiophene):trifuoromethanesulfonate thin films

“…PEDOT:OTf thin films were prepared according to the procedure described elsewhere 9 on clean substrates (Si wafer covered with sputtered Ti/Au 20/200 nm). We have employed N,Ndimethylformamide (DMF) and N-methyl-2-pyrrolidone (NMP) as co-solvents in our precursor solution formulation in order to increase electrical conductivity as described by Yvenou et al 26 . See Section 1 of Supporting Information (SI) for the complete preparation procedure.…”

Progress of hybrid nanocomposite materials for thermoelectric applications

“…26 Additionally, the solution processability of conducting polymers at a low temperature has a great advantage in the large-scale production of hybrid nanocomposites. Therefore, the use of fascinating printing methods such as aerosol jet printing, 24 screen printing, 27,28 drop-casting, ink-jet printing, 29,30 spin coating, 31 slot-die coating, 32 spray coating, 33 and dispenser printing 34 makes it possible to fabricate fully flexible TE devices. For example, polyacetylene exhibits the highest thermoelectric properties with the highest power factor of 10 À4 W m À1 K À2 due to its excellent electrical conductivity among the conducting polymers, but its ageing and environmental instability exclude it from the TE list.…”