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

Abstract

Poly(9, generally has a large Seebeck coefficient, and single-walled carbon nanotubes (SWCNTs) have high electrical conductivity. In this work, we prepared F8BT/SWCNT composites to combine the good Seebeck coefficient of the polymer and the excellent electrical conductivity of SWCNTs to achieve enhanced thermoelectric properties. For the composite materials, the maximum power factor of 1 μW mK −2 was achieved when the SWCNT content was 60%, with the maximum ZT value of 4.6 × 10 −4 . After ferric chloride was employed as the oxidative dopant for the composites, the electrical conductivity of the composites improved significantly. The maximum value of power factor (1.7 μW mK −2 ) was achieved when the SWCNT content was 60%, and the ZT value of 7.1 × 10 −4 was about 1.5 times as high as that of the composites with undoped F8BT.

Synthesis of Conjugated Polymers by Sustainable Suzuki Polycondensation in Water and under Aerobic Conditions

“…Working at 80 °C and in the presence of a 10 vol % amount of toluene (Table , entry 9), we obtained a M n of ∼27 kg/mol. This value is higher than that obtained in our control experiment and in line with the results described in the literature for similar SPCs in organic solvents. − On comparing the E-factor of our protocol (46) and the literature procedure (209), we find a difference by a factor of 4.5.…”

Polymer/Carbon Composites with Versatile Interfacial Interactions for High Performance Carbon‐Based Thermoelectrics: Principles and Applications

“…[41][42][43] Importantly, a higher degree of regioregularity is preferred to achieve better TE performances for nanocomposites. [42] In addition to the four well-known conjugated polymers, some other conjugated polymers, such as poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV), [44] poly(thiophene-3-[2-(2-methoxy-ethoxy)ethoxy]-2,5-diyl) (PMEET), [26] poly(diketopyrrolopyrrole−selenophene) (PDPPSe), [43d] poly(9,9-di-n-octylfluorene-alt-benzothiadiazol) (F8BT), [45] PTH, [46] dithiophene cyclopentadiene (DTC)-based polymers, [47] and poly-Schiff base, [48] have been discussed as polymer components in recent years. Notably, two types of conjugated polymers with innovative chemical structures, i.e., donor-acceptor (D-A) copolymers with high electron affinity [49] and CPEs with charged conjugated polymer chains, [33b] are emerging as next-generation polymer components due to the n-type nature of D-A copolymers after doping and the excellent solubility of CPEs in polar solvents.…”

Thermoelectric Energy Harvesters: A Review of Recent Developments in Materials and Devices for Different Potential Applications

“…Thermoelectric materials are able to directly convert heat into electrical energy when a temperature difference exists between the two ends of the material [22]. Thermoelectric devices are easily scalable for energy conversion and have no moving parts, which enables their application under any conditions, from smallscale synthesis to huge industrial facilities [23][24][25]. Many research groups have worked towards finding compounds with proper characteristics in order to generate an efficient thermoelectric effect, and nanomaterials seem to fit well with the target of these studies [26].…”