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Sunghyun Kim1 Choon Woo Lim2

1, Wonkwang University, Iksan, , Korea (the Republic of)
2, Hannam University, Daejeon, , Korea (the Republic of)

We investigated the effect of graphene quantum dots (GQDs) on the thermoelectric properties of free-standing poly(3,4-ethylene dioxythiophene):poly(styrenesulfonate) (.PEDOT:PSS) films. The electrical conductivity and Seebeck coefficient of the film containing 0.50 vol% GQDs are 164.60 S/cm and 34.85 µV/K, compared with 22.50 S/cm and 27.72 μV/K, respectively, for the pristine PEDOT:PSS film without GQDs. The power factor (PF) increased up to 22.37 μW/mK2, which is ~13 times higher than that (1.73 μW/mK2) of the pristine film through the selective dedoping of PEDOT by the chemical treatment. Thus, the improved PF is due to the optimized charge carrier concentration and increased Hall mobility by the morphological and structural evolution

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