In-situ fabrication and enhanced thermoelectric properties of carbon nanotubes filled poly(3,4-ethylenedioxythiophene) composites

Enhanced figure of merit of poly(9,9‐di‐n‐octylfluorene‐alt‐benzothiadiazole) and SWCNT thermoelectric composites by doping with FeCl3

“…It is widely accepted that conjugated polymers are basically insulated in their intrinsic state . Thus, most investigations of the thermoelectric properties of conjugated polymers are about the composites with conductive inorganic materials such as carbon nanotubes, graphite, and so forth . These composites are confirmed to possess both the advantages of polymers and inorganic materials for thermoelectric application.…”

Preparation and Thermoelectric Properties of Graphite/poly(3,4-ethyenedioxythiophene) Nanocomposites

“…This is about 30 times higher than that of pure PEDOT (0.1 µW/mK 2 ) prepared by the same procedure, and also much higher than those of a CB/PEDOT nanocomposite (0.96 µWm −1 K −2 with 2.52 wt % CB at 300 K) [16] and a graphite-PEDOT: PSS coated polyester fabric (0.025 µWm −1 K −2 with 15 wt % graphite content at 398 K) [20]. However, this value is lower when compared to the nanocomposites using graphene or carbon nanotube as fillers, for example, a graphene/PEDOT:PSS nanocomposite (11.09 µWm −1 K −2 with 2 wt % graphene at 300 K) [17], a rGO/PEDOT composite (5.2 µWm −1 K −2 with 16 wt% rGO at 300 K) [18], a MWCNT/PEDOT composite (25.9 µWm −1 K −2 with 26.5 wt % MWCNT at 300 K) [19], a PEDOT:PSS/graphene-iron oxide nanocomposite (51.93 µWm −1 K −2 with 95 wt % GINC at 300 K) [28], a graphene/PEDOT:PSS composite (53.3 µWm −1 K −2 with 3 wt % graphene at room temperature) [23], a SWCNT/PEDOT:PSS composite (300 µWm −1 K −2 with 74 wt % SWCNTs at room temperature) [24], and a CNT/PEDOT composite (1050 µWm −1 K −2 with 10.7 wt % CNTs at room temperature) [25]. The possible potential applications of our graphite/PEDOT nanocomposites can be used in the following aspects: wrist watches, remote wireless sensors, biomedical devices, etc.…”

“…Many researchers have used carbon materials, such as carbon nanotubes (CNTs) and graphene, as thermoelectrics in their own right [10] and as fillers for preparation of conducting polymer-based nanocomposites [10,[16][17][18][19][20][21][22][23][24][25], mainly because of their high electrical conductivity and excellent thermal stability [26,27]. For instance, we fabricated carbon black (CB)/poly (3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (PEDOT:PSS) composite films using a spin-coating process, and a power factor of 0.96 µWm −1 K −2 was obtained for the composite film with 2.52 wt % CB [16].…”

“…Furthermore, CNTs can be used as fillers. For example, Wang et al [19] fabricated multi-walled carbon nanotube (MWCNT)/PEDOT composites by in-situ oxidative polymerization, and a power factor of 25.9 µWm −1 K −2 , was obtained for the composites with 26.5 wt % MWCNTs at room temperature. Several examples of CNT-containing composites yield much higher power factors [24,25].…”

The Cross‐Linking Effect on the Thermoelectric Properties of Conjugated Polymer/Carbon Nanotube Composite Films

“…Pristine CPs showed characteristic peaks, the CC stretching vibration on the π–π conjugated backbone, at 1341 cm −1 ( P1 ) and 1333 cm −1 ( P2 ). The peak at 1440 cm −1 ( P1 ) and 1437 cm −1 ( P2 ) corresponds to the CC symmetssrical stretching mode of the thiophene units . In CP/SWCNT composites, CP's vibrational peaks were shifted 2−5 cm −1 , this shift may result from π–π interfacial interactions between CP and the SWCNTs .…”