TY - JOUR
T1 - Thermoelectric behavior of organic thin film nanocomposites
AU - Moriarty, Gregory P.
AU - De, Sukanta
AU - King, Paul J.
AU - Khan, Umar
AU - Via, Michael
AU - King, Julia A.
AU - Coleman, Jonathan N.
AU - Grunlan, Jaime C.
PY - 2013/1/15
Y1 - 2013/1/15
N2 - 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.
AB - 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.
KW - PEDOT:PSS
KW - carbon nanotubes
KW - polymer thermoelectric
KW - power factor
KW - thermal conductivity
UR - http://www.scopus.com/inward/record.url?scp=84870908018&partnerID=8YFLogxK
U2 - 10.1002/polb.23186
DO - 10.1002/polb.23186
M3 - Article
AN - SCOPUS:84870908018
SN - 0887-6266
VL - 51
SP - 119
EP - 123
JO - Journal of Polymer Science, Part B: Polymer Physics
JF - Journal of Polymer Science, Part B: Polymer Physics
IS - 2
ER -