Type

Journal Article

Authors

Umar Khan
Jonathan Coleman

Subjects

Physics

Topics
thin films thin film electrical conductivity single walled carbon nanotubes nanoscience materials poly styrene physics electrical properties

Thermoelectric behavior of organic thin film nanocomposites (2013)

Abstract Organic thin film nanocomposites, prepared by liquid-phase exfoliation, were investigated for their superior electrical properties and thermoelectric behavior. Single-walled carbon nanotubes (SWNT) were stabilized by intrinsically conductive poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) in an aqueous solution. The electrical conductivity (σ) was found to increase linearly as 20 to 95 wt % SWNT. At 95 wt % SWNT, these thin films exhibit metallic electrical conductivity (∼4.0 × 105 S m−1) that is among the highest values ever reported for a free-standing, fully organic material. The thermopower (S) remains relatively unaltered as the electrical conductivity increases, leading to a maximum power factor (S2σ) of 140 μW m−1 K−2. This power factor is within an order of magnitude of bismuth telluride, so it is believed that these flexible films could be used for some unique thermoelectric applications requiring mechanical flexibility and printability.
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Full list of authors on original publication

Umar Khan, Jonathan Coleman

Experts in our system

1
Umar Khan
Trinity College Dublin
Total Publications: 37
 
2
Jonathan Coleman
Trinity College Dublin
Total Publications: 217