Enhanced thermoelectric power factor of tensile drawn poly(3-hexylthiophene)
The thermoelectric power factor of a broad range of organic semiconductors scales with their electrical conductivity according to a widely obeyed power law, and therefore, strategies that permit this empirical trend to be surpassed are highly sought after. Here, tensile drawing of the conjugated pol...
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| Main Authors: | , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2019
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| In: |
ACS Macro Letters
Year: 2018, Volume: 8, Issue: 1, Pages: 70-76 |
| ISSN: | 2161-1653 |
| DOI: | 10.1021/acsmacrolett.8b00820 |
| Online Access: | Verlag, Volltext: https://doi.org/10.1021/acsmacrolett.8b00820
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| Author Notes: | Jonna Hynynen, Emmy Järsvall, Renee Kroon, Yadong Zhang, Stephen Barlow, Seth R. Marder, Martijn Kemerink, Anja Lund, and Christian Müller |
| Summary: | The thermoelectric power factor of a broad range of organic semiconductors scales with their electrical conductivity according to a widely obeyed power law, and therefore, strategies that permit this empirical trend to be surpassed are highly sought after. Here, tensile drawing of the conjugated polymer poly(3-hexylthiophene) (P3HT) is employed to create free-standing films with a high degree of uniaxial alignment. Along the direction of orientation, sequential doping with a molybdenum tris(dithiolene) complex leads to a 5-fold enhancement of the power factor beyond the predicted value, reaching up to 16 μW m-1 K-2 for a conductivity of about 13 S cm-1. Neither stretching nor doping affect the glass transition temperature of P3HT, giving rise to robust free-standing materials that are of interest for the design of flexible thermoelectric devices. |
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| Item Description: | Published online 2018 Dec 26 Gesehen am 26.11.2019 |
| Physical Description: | Online Resource |
| ISSN: | 2161-1653 |
| DOI: | 10.1021/acsmacrolett.8b00820 |