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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

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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
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:
DateEvent
9 February 2022Published
24 January 2022Available
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:
Project/Grant IDRIOXX Funder NameFunder ID
MR/S015329/2UK Research and Innovationhttp://dx.doi.org/10.13039/100014013
ECF-2018-375Leverhulme Trusthttp://dx.doi.org/10.13039/501100000275
767187 “QuIET”H2020 Future and Emerging Technologieshttp://dx.doi.org/10.13039/100010664
EP/K0394/23/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
766853 “EFINED”H2020 Future and Emerging Technologieshttp://dx.doi.org/10.13039/100010664
PEJD-2019-POST/IND-16353Consejería de Educación e InvestigaciónUNSPECIFIED
PEJD-2019-POST/IND-16353European Social Fundhttp://dx.doi.org/10.13039/501100004895
P2018/NMT-4321Comunidad de Madridhttp://dx.doi.org/10.13039/100012818
MAT2017-88693-RMinisterio de Ciencia e InnovaciónUNSPECIFIED
EP/P007554/1[EPSRC] Engineering and Physical Sciences Research Councilhttp://dx.doi.org/10.13039/501100000266
CEX2018-000805-MMinisterio de Ciencia e InnovaciónUNSPECIFIED

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