title: Liquid Exfoliated Graphene as Dopant for Improving the Thermoelectric Power Factor of Conductive PEDOT:PSS Nanofilm with Hydrazine Treatment.
abstract: Here, we fabricated a highly conductive poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate) (
  PSS) nanofilm via vacuum filtration with enhanced thermoelectric power factor by doping of liquid exfoliated graphene (GE) and hydrazine treatment. The effect of GE exfoliated in dimethylformamide (DMF) and N-methyl-2-pyrrolidone (NMP) on the electrical conductivity and thermopower of
  PSS was investigated. Although electrical conductivity decreased with increasing GE, thermoelectric power factors of
  PSS nanofilms were improved with 3 wt % GE in DMF (38.6 μW m(-1) K(-2)) and in NMP (28.0 μW m(-1) K(-2)) compared to pure
  PSS (11.5 μW m(-1) K(-2)). The mechanism of improvement was proposed to be the removal of PSS and the good interaction between PEDOT and GE. With hydrazine treatment, 3 wt % GE-doped
  PSS nanofilm (PG3) showed a further enhanced power factor of 53.3 μW m(-1) K(-2) (∼5 times higher than that of pristine
  PSS nanofilm). The effects of hydrazine containing concentration, treatment time, and temperature on the electrical conductivity and Seebeck coefficient of PG3 were investigated systematically. An estimated thermoelectric figure of merit (ZT) is 0.05 with the optimized power factor at room temperature.
authors.affiliation: Department of Physics, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
authors.forename: Jinhua
authors.initials: J
authors.lastname: Xiong
authors.affiliation: Department of Physics, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
authors.forename: Fengxing
authors.initials: F
authors.lastname: Jiang
authors.affiliation: Department of Physics, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Shi
authors.affiliation: Department of Physics, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
authors.forename: Jingkun
authors.initials: J
authors.lastname: Xu
authors.affiliation: Department of Physics, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
authors.forename: Congcong
authors.initials: C
authors.lastname: Liu
authors.affiliation: Department of Physics, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
authors.forename: Weiqiang
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Department of Physics, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
authors.forename: Qinglin
authors.initials: Q
authors.lastname: Jiang
authors.affiliation: Department of Physics, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
authors.forename: Zhengyou
authors.initials: Z
authors.lastname: Zhu
authors.affiliation: Department of Physics, Jiangxi Science and Technology Normal University, Nanchang 330013, China.
authors.forename: Yongjing
authors.initials: Y
authors.lastname: Hu
keywords: PEDOT:PSS; exfoliated graphene; hydrazine treatment; nanocomposite; power factor