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| Verfasst von: | Rodríguez-Martínez, Xabier [VerfasserIn]  |
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| | Saiz, Fernan [VerfasserIn] |
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| | Dörling, Bernhard [VerfasserIn] |
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| | Marina, Sara [VerfasserIn] |
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| | Guo, Jiali [VerfasserIn] |
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| | Xu, Kai [VerfasserIn] |
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| | Chen, Hu [VerfasserIn] |
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| | Martin, Jaime [VerfasserIn] |
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| | McCulloch, Iain [VerfasserIn] |
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| | Rurali, Riccardo [VerfasserIn] |
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| | Reparaz, Juan Sebastian [VerfasserIn] |
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| | Campoy-Quiles, Mariano [VerfasserIn] |
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| Titel: | On the thermal conductivity of conjugated polymers for thermoelectrics |
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| Verf.angabe: | Xabier Rodríguez-Martínez, Fernan Saiz, Bernhard Dörling, Sara Marina, Jiali Guo, Kai Xu, Hu Chen, Jaime Martin, Iain McCulloch, Riccardo Rurali, Juan Sebastian Reparaz, and Mariano Campoy-Quiles |
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| E-Jahr: | 2024 |
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| Jahr: | 25 June 2024 |
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| Umfang: | 15 S. |
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| Fussnoten: | Gesehen am 17.02.2025 |
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| Titel Quelle: | Enthalten in: Advanced energy materials |
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| Ort Quelle: | Weinheim : Wiley-VCH, 2011 |
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| Jahr Quelle: | 2024 |
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| Band/Heft Quelle: | 14(2024), 35 vom: Sept., Artikel-ID 2401705, Seite 1-15 |
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| ISSN Quelle: | 1614-6840 |
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| Abstract: | The thermal conductivity (κ) governs how heat propagates in a material, and thus is a key parameter that constrains the lifetime of optoelectronic devices and the performance of thermoelectrics (TEs). In organic electronics, understanding what determines κ has been elusive and experimentally challenging. Here, by measuring κ in 17 π-conjugated materials over different spatial directions, it is statistically shown how microstructure unlocks two markedly different thermal transport regimes. κ in long-range ordered polymers follows standard thermal transport theories: improved ordering implies higher κ and increased anisotropy. κ increases with stiffer backbones, higher molecular weights and heavier repeat units. Therein, charge and thermal transport go hand-in-hand and can be decoupled solely via the film texture, as supported by molecular dynamics simulations. In largely amorphous polymers, however, κ correlates negatively with the persistence length and the mass of the repeat unit, and thus an anomalous, albeit useful, behavior is found. Importantly, it is shown that for quasi-amorphous co-polymers (e.g., IDT-BT) κ decreases with increasing charge mobility, yielding a 10-fold enhancement of the TE figure-of-merit ZT compared to semi-crystalline counterparts (under comparable electrical conductivities). Finally, specific material design rules for high and low κ in organic semiconductors are provided. |
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| DOI: | doi:10.1002/aenm.202401705 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
kostenfrei: Volltext: https://doi.org/10.1002/aenm.202401705 |
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| | kostenfrei: Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/aenm.202401705 |
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| | DOI: https://doi.org/10.1002/aenm.202401705 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| Sach-SW: | conjugated polymers |
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| | design rules |
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| | molecular dynamics |
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| | organic thermoelectrics |
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| | thermal anisotropy |
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| | thermal conductivity |
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| K10plus-PPN: | 1917390149 |
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| Verknüpfungen: | → Zeitschrift |
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On the thermal conductivity of conjugated polymers for thermoelectrics / Rodríguez-Martínez, Xabier [VerfasserIn]; 25 June 2024 (Online-Ressource)
