A Chemically Doped Naphthalenediimide-Bithiazole Polymer for n-Type Organic Thermoelectrics

Wang S, Sun H, Erdmann T, Wang G, Fazzi D, Lappan U, Puttisong Y, Chen Z, Berggren M, Crispin X, Kiriy A, Voit B, Marks TJ, Fabiano S, Facchetti A (2018)

Publication Type: Journal article

Publication year: 2018

Journal

Advanced Materials Wiley

Book Volume: 30

Article Number: 1801898

Journal Issue: 31

DOI: 10.1002/adma.201801898

Abstract

The synthesis of a novel naphthalenediimide (NDI)-bithiazole (Tz2)-based polymer [P(NDI2OD-Tz2)] is reported, and structural, thin-film morphological, as well as charge transport and thermoelectric properties are compared to the parent and widely investigated NDI-bithiophene (T2) polymer [P(NDI2OD-T2)]. Since the steric repulsions in Tz2 are far lower than in T2, P(NDI2OD-Tz2) exhibits a more planar and rigid backbone, enhancing π–π chain stacking and intermolecular interactions. In addition, the electron-deficient nature of Tz2 enhances the polymer electron affinity, thus reducing the polymer donor–acceptor character. When n-doped with amines, P(NDI2OD-Tz2) achieves electrical conductivity (≈0.1 S cm−1) and a power factor (1.5 µW m−1 K−2) far greater than those of P(NDI2OD-T2) (0.003 S cm−1 and 0.012 µW m−1 K−2, respectively). These results demonstrate that planarized NDI-based polymers with reduced donor–acceptor character can achieve substantial electrical conductivity and thermoelectric response.

Involved external institutions

Max-Planck-Institut für Kohlenforschung (MPI KoFo) / Max Planck Institute for Coal Research DE Germany (DE) Linköpings universitet / Linköping University SE Sweden (SE) Flexterra US United States (USA) (US) Technische Universität Dresden DE Germany (DE) Northwestern University US United States (USA) (US) Leibniz-Institut für Polymerforschung Dresden e. V. DE Germany (DE)

How to cite

APA:

Wang, S., Sun, H., Erdmann, T., Wang, G., Fazzi, D., Lappan, U.,... Facchetti, A. (2018). A Chemically Doped Naphthalenediimide-Bithiazole Polymer for n-Type Organic Thermoelectrics. Advanced Materials, 30(31). https://doi.org/10.1002/adma.201801898

MLA:

Wang, Suhao, et al. "A Chemically Doped Naphthalenediimide-Bithiazole Polymer for n-Type Organic Thermoelectrics." Advanced Materials 30.31 (2018).

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