Molecular Doping of a Naphthalene Diimide–Bithiophene Copolymer and SWCNTs for n-Type Thermoelectric Composites

Ye Liu; Diego Rosas Villalva; Anirudh Sharma; Mohammed Haque; Derya Baran

doi:10.1021/acsami.0c16740

Molecular Doping of a Naphthalene Diimide–Bithiophene Copolymer and SWCNTs for n-Type Thermoelectric Composites

Ye Liu, Diego Rosas Villalva, Anirudh Sharma, Mohammed Haque, Derya Baran

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Abstract

Molecular doping is a powerful tool to tune the thermoelectric (TE) properties of solution-processed semiconductors. In this work, we prepared a binary composite and effectively doped both of its constituents, that is, naphthalene diimide–bithiophene copolymers (PNDI2OD-T2) and single-walled carbon nanotubes (SWCNTs), by a 1H-benzimidazole derivative (N-DMBI). The doped composites show an n-type character and an in-plane TE figure of merit (ZT), exceeding the values obtained with the doped polymers. The use of SWCNTs consistently results in a higher σ with a maximum value above 102 S/cm, resulting in the highest power factor of 18.1 μW/mK2 for an SWCNT loading of 45.5 wt %. Furthermore, an SWCNT content up to 9 wt % does not compromise the low thermal conductivity of the polymer matrices, leading to a ZT value of 0.0045. The n-type composites show good solution processability and relatively stable Seebeck coefficients upon air exposure for 8 months.

Original language	English (US)
Journal	ACS Applied Materials & Interfaces
DOIs	https://doi.org/10.1021/acsami.0c16740
State	Published - Dec 29 2020

Bibliographical note

KAUST Repository Item: Exported on 2021-01-04
Acknowledged KAUST grant number(s): CRG2018-3737., OSR-2018-CARF/CCF-3079, OSR-CRG2018-3737
Acknowledgements: This report is based upon the work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award no. OSR-CRG2018-3737. A.S. greatly acknowledges the financial support from King Abdullah University of Science and Technology (KAUST) award OSR-2018-CARF/CCF-3079.

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title = "Molecular Doping of a Naphthalene Diimide–Bithiophene Copolymer and SWCNTs for n-Type Thermoelectric Composites",

abstract = "Molecular doping is a powerful tool to tune the thermoelectric (TE) properties of solution-processed semiconductors. In this work, we prepared a binary composite and effectively doped both of its constituents, that is, naphthalene diimide–bithiophene copolymers (PNDI2OD-T2) and single-walled carbon nanotubes (SWCNTs), by a 1H-benzimidazole derivative (N-DMBI). The doped composites show an n-type character and an in-plane TE figure of merit (ZT), exceeding the values obtained with the doped polymers. The use of SWCNTs consistently results in a higher σ with a maximum value above 102 S/cm, resulting in the highest power factor of 18.1 μW/mK2 for an SWCNT loading of 45.5 wt %. Furthermore, an SWCNT content up to 9 wt % does not compromise the low thermal conductivity of the polymer matrices, leading to a ZT value of 0.0045. The n-type composites show good solution processability and relatively stable Seebeck coefficients upon air exposure for 8 months.",

author = "Ye Liu and Villalva, {Diego Rosas} and Anirudh Sharma and Mohammed Haque and Derya Baran",

note = "KAUST Repository Item: Exported on 2021-01-04 Acknowledged KAUST grant number(s): CRG2018-3737., OSR-2018-CARF/CCF-3079, OSR-CRG2018-3737 Acknowledgements: This report is based upon the work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award no. OSR-CRG2018-3737. A.S. greatly acknowledges the financial support from King Abdullah University of Science and Technology (KAUST) award OSR-2018-CARF/CCF-3079.",

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AU - Liu, Ye

AU - Villalva, Diego Rosas

AU - Sharma, Anirudh

AU - Haque, Mohammed

AU - Baran, Derya

N1 - KAUST Repository Item: Exported on 2021-01-04 Acknowledged KAUST grant number(s): CRG2018-3737., OSR-2018-CARF/CCF-3079, OSR-CRG2018-3737 Acknowledgements: This report is based upon the work supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under Award no. OSR-CRG2018-3737. A.S. greatly acknowledges the financial support from King Abdullah University of Science and Technology (KAUST) award OSR-2018-CARF/CCF-3079.

PY - 2020/12/29

Y1 - 2020/12/29

N2 - Molecular doping is a powerful tool to tune the thermoelectric (TE) properties of solution-processed semiconductors. In this work, we prepared a binary composite and effectively doped both of its constituents, that is, naphthalene diimide–bithiophene copolymers (PNDI2OD-T2) and single-walled carbon nanotubes (SWCNTs), by a 1H-benzimidazole derivative (N-DMBI). The doped composites show an n-type character and an in-plane TE figure of merit (ZT), exceeding the values obtained with the doped polymers. The use of SWCNTs consistently results in a higher σ with a maximum value above 102 S/cm, resulting in the highest power factor of 18.1 μW/mK2 for an SWCNT loading of 45.5 wt %. Furthermore, an SWCNT content up to 9 wt % does not compromise the low thermal conductivity of the polymer matrices, leading to a ZT value of 0.0045. The n-type composites show good solution processability and relatively stable Seebeck coefficients upon air exposure for 8 months.

AB - Molecular doping is a powerful tool to tune the thermoelectric (TE) properties of solution-processed semiconductors. In this work, we prepared a binary composite and effectively doped both of its constituents, that is, naphthalene diimide–bithiophene copolymers (PNDI2OD-T2) and single-walled carbon nanotubes (SWCNTs), by a 1H-benzimidazole derivative (N-DMBI). The doped composites show an n-type character and an in-plane TE figure of merit (ZT), exceeding the values obtained with the doped polymers. The use of SWCNTs consistently results in a higher σ with a maximum value above 102 S/cm, resulting in the highest power factor of 18.1 μW/mK2 for an SWCNT loading of 45.5 wt %. Furthermore, an SWCNT content up to 9 wt % does not compromise the low thermal conductivity of the polymer matrices, leading to a ZT value of 0.0045. The n-type composites show good solution processability and relatively stable Seebeck coefficients upon air exposure for 8 months.

UR - http://hdl.handle.net/10754/666790

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DO - 10.1021/acsami.0c16740

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JO - ACS Applied Materials & Interfaces

JF - ACS Applied Materials & Interfaces

ER -

Molecular Doping of a Naphthalene Diimide–Bithiophene Copolymer and SWCNTs for n-Type Thermoelectric Composites

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