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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Martin, Jaime
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024High Polymer Molecular Weight Yields Solar Cells with Simultaneously Improved Performance and Thermal Stabilitycitations
- 2024Using spatial confinement to decipher polymorphism in the organic semiconductor p-DTS(FBTTh2)2citations
- 2024Enhancing the conductivity and thermoelectric performance of semicrystalline conducting polymers through controlled tie chain incorporationcitations
- 2024Impact of Oligoether Side-Chain Length on the Thermoelectric Properties of a Polar Polythiophenecitations
- 2024On The Thermal Conductivity of Conjugated Polymers for Thermoelectricscitations
- 2024Enhancing the Electrical Conductivity and Long‐Term Stability of PEDOT:PSS Electrodes through Sequential Treatment with Nitric Acid and Cesium Chloridecitations
- 2024Enhancing the Conductivity and Thermoelectric Performance of Semicrystalline Conducting Polymers through Controlled Tie Chain Incorporation.
- 2023Impact of oxidation-induced ordering on the electrical and mechanical properties of a polythiophene co-processed with bistriflimidic acidcitations
- 2023Impact of Oligoether Side-Chain Length on the Thermoelectric Properties of a Polar Polythiophenecitations
- 2022Correlating Acceptor Structure and Blend Nanostructure with the Photostability of Nonfullerene Organic Solar Cellscitations
- 2021Physical Aging Behavior of a Glassy Polyethercitations
- 2021Improving molecular alignment and charge percolation in semiconducting polymer films with highly localized electronic states through tailored thermal annealingcitations
- 2020The Importance of Quantifying the Composition of the Amorphous Intermixed Phase in Organic Solar Cellscitations
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article
On The Thermal Conductivity of Conjugated Polymers for Thermoelectrics
Abstract
he 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.