Thermoelectric enhancement in single organic radical molecules
| Autor: | Juan Hurtado-Gallego, Sara Sangtarash, Ross Davidson, Laura Rincón-García, Abdalghani Daaoub, Gabino Rubio-Bollinger, Colin J. Lambert, Vasily S. Oganesyan, Martin R. Bryce, Nicolás Agraït, Hatef Sadeghi |
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| Přispěvatelé: | UAM. Departamento de Física de la Materia Condensada |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Repositorio Institucional del Instituto Madrileño de Estudios Avanzados en Nanociencia instname Nano Letters, 2022, Vol.22(3) [Peer Reviewed Journal] Nanoletters |
| ISSN: | 1530-6984 |
| Popis: | Organic thermoelectric materials have potential for wearable heating, cooling, and energy generation devices at room temperature. For this to be technologically viable, high-conductance (G) and high-Seebeck-coefficient (S) materials are needed. For most semiconductors, the increase inSis accompanied by a decrease inG. Here, using a combined experimental and theoretical investigation, we demonstrate that a simultaneous enhancement ofSandGcan be achieved in single organic radical molecules, thanks to their intrinsic spin state. A counterintuitive quantum interference (QI) effect is also observed in stable Blatter radical molecules, where constructive QI occurs for ameta-connected radical, leading to further enhancement of thermoelectric properties. Compared to an analogous closed-shell molecule, the power factor is enhanced by more than 1 order of magnitude in radicals. These results open a new avenue for the development of organic thermoelectric materials operating at room temperature. |
| Databáze: | OpenAIRE |
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