Thermoelectric Properties of Self-Assembled Thiophene Derivatives: Effect of Molecular Structure on Doping Efficiency and Fermi Level Alignment

Raveendran, Neethi; Ghosh, Tanwistha; Ignatious, Vijitha; Darshan, Vibhu; Jacob, Navin; Deb, Biswapriya; Vijayakumar, Chakkooth

doi:10.2139/ssrn.4330036

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“…4b) indicate peaks in the binding energy range of 196-202 eV, which originate from the FeCl 3 dopants. [61][62][63][64] When the FeCl 3 is dissolved in a solvent, it dissociates into FeCl…”

Section: Spectroscopic Analysesmentioning

confidence: 99%

Enhancing the thermoelectric performance of donor–acceptor conjugated polymers through dopant miscibility: a comparative study of fluorinated substituents and side-chain lengths

Ding,

Chen,

Liu

et al. 2024

J. Mater. Chem. A

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“…4b) indicate peaks in the binding energy range of 196-202 eV, which originate from the FeCl 3 dopants. [61][62][63][64] When the FeCl 3 is dissolved in a solvent, it dissociates into FeCl…”

Section: Spectroscopic Analysesmentioning

confidence: 99%

Enhancing the thermoelectric performance of donor–acceptor conjugated polymers through dopant miscibility: a comparative study of fluorinated substituents and side-chain lengths

Ding,

Chen,

Liu

et al. 2024

J. Mater. Chem. A

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“…Among them, poly (3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PE-DOT:PSS) is the most popular one mainly thanks to its solution processability and high TE properties. [11][12][13][14] Although an as-prepared PEDOT:PSS film from its aqueous solution exhibits a low Seebeck coefficients of 15-18 μV K −1 and low conductivity of less than 1 S cm −1 . [15,16] The TE properties can be improved through the enhancement of the conductivity, Seebeck coefficient, or both.…”

Section: Introductionmentioning

confidence: 99%

Great Enhancement in the Seebeck Coefficient of PEDOT:PSS by Polaron Level Splitting via π–π Overlapping with Nonpolar Small Aromatic Molecules

Li,

Shan,

Luo

et al. 2023

Adv Funct Materials

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Organic thermoelectric (TE) materials are regarded as the next‐generation TE materials because of their merits including low cost, high mechanical flexibility, and low intrinsic thermal conductivity. However, their Seebeck coefficient is usually quite low. Herein, a new strategy is demonstrated to greatly enhance the Seebeck coefficient of poly(3,4‐ethylenedioxy‐thiophene):poly(styrenesulfonate) (PEDOT:PSS), which is the most popular TE polymer, through polaron level splitting via π–π overlapping with nonpolar small aromatic molecules including anthracene, naphthalene, and pyrene. Although these aromatic molecules are neither oxidizing nor reducing agent, they can greatly enhance the Seebeck coefficient of PEDOT:PSS films pre‐treated with dimethyl sulfoxide, acid, or acid then base, while they do not lower the electrical conductivity too much. Through such a treatment with anthracene, the Seebeck coefficient can be up to 45.5 µV K−1, and the ZT value can be up to 0.27. The enhancement is ascribed to the splitting of the lower polaron energy level of PEDOT, which is induced by the π–π overlapping between the aromatic compounds and conjugated PEDOT. This can shift up the Fermi level, thereby enhancing the Seebeck coefficient.

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Thermoelectric Properties of Self-Assembled Thiophene Derivatives: Effect of Molecular Structure on Doping Efficiency and Fermi Level Alignment

Cited by 2 publications

References 0 publications

Enhancing the thermoelectric performance of donor–acceptor conjugated polymers through dopant miscibility: a comparative study of fluorinated substituents and side-chain lengths

Enhancing the thermoelectric performance of donor–acceptor conjugated polymers through dopant miscibility: a comparative study of fluorinated substituents and side-chain lengths

Great Enhancement in the Seebeck Coefficient of PEDOT:PSS by Polaron Level Splitting via π–π Overlapping with Nonpolar Small Aromatic Molecules

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