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ISSN Online: 2377-424X

ISBN Print: 978-1-56700-474-8

ISBN Online: 978-1-56700-473-1

International Heat Transfer Conference 16
August, 10-15, 2018, Beijing, China

DOPING EFFECTS ON THERMAL TRANSPORT PROPERTIES OF PEDOT

Get access (open in a dialog) DOI: 10.1615/IHTC16.mpe.022461
pages 6045-6051

Аннотация

Organic semiconductors show potential applications due to their advantages of lightweight and flexibility. Doping plays a crucial role in optimizing electric properties. However, doping also has significant impact on thermal properties and remains to be investigated. Through molecular dynamics simulations, we unrevealed the doping effect on thermal transport in conjugated conductive polymer, poly(3,4-ethylenedioxythiophene), PEDOT. Doping improves the anisotropy of thermal conductivity in PEDOT by almost one order. Moreover, in the cases with doping, we surprisingly found that doping concentration has no effects on thermal transport. Doping reduces thermal conductivity along two inter-chain directions due to the weakened phonon coupling and reflection of heat flux. The microscopic mechanism is analyzed via vibrational properties, suggesting that the coulombic interactions lead to less anharmonic phonon scattering thus increase along-chain thermal conductivity. From the view of thermal transport, our work demonstrated that engineered doping could manipulate thermal transport in organic semiconductors.