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Thermoelectric enhancement in single organic radical molecules
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Hurtado-Gallego, Juan, Sangtarash, Sara, Davidson, Ross, Rincón-García, Laura, Daaoub, Abdalghani, Rubio-Bollinger, Gabino, Lambert, Colin J., Oganesyan, Vasily S., Bryce, Martin R., Agraït, Nicolás and Sadeghi, Hatef (2022) Thermoelectric enhancement in single organic radical molecules. Nano Letters, 22 (3). pp. 948-953. doi:10.1021/acs.nanolett.1c03698 ISSN 1530-6984.
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Official URL: https://doi.org/10.1021/acs.nanolett.1c03698
Abstract
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 in S is accompanied by a decrease in G. Here, using a combined experimental and theoretical investigation, we demonstrate that a simultaneous enhancement of S and G can 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 a meta-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.
| Item Type: | Journal Article | ||||||||||||||||||||||||||||||||||||
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| Subjects: | Q Science > QC Physics | ||||||||||||||||||||||||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Engineering > Engineering | ||||||||||||||||||||||||||||||||||||
| SWORD Depositor: | Library Publications Router | ||||||||||||||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Thermoelectricity, Energy harvesting, Thermoelectric materials, Molecules, Quantum electronics | ||||||||||||||||||||||||||||||||||||
| Journal or Publication Title: | Nano Letters | ||||||||||||||||||||||||||||||||||||
| Publisher: | American Chemical Society | ||||||||||||||||||||||||||||||||||||
| ISSN: | 1530-6984 | ||||||||||||||||||||||||||||||||||||
| Official Date: | 9 February 2022 | ||||||||||||||||||||||||||||||||||||
| Dates: |
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| Volume: | 22 | ||||||||||||||||||||||||||||||||||||
| Number: | 3 | ||||||||||||||||||||||||||||||||||||
| Page Range: | pp. 948-953 | ||||||||||||||||||||||||||||||||||||
| DOI: | 10.1021/acs.nanolett.1c03698 | ||||||||||||||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||||||||||||||
| Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||||||||||||||||||||||||||
| Date of first compliant deposit: | 9 March 2022 | ||||||||||||||||||||||||||||||||||||
| Date of first compliant Open Access: | 11 March 2022 | ||||||||||||||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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