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Blended Conjugated Host and Unconjugated Dopant Polymers Towards N-type All-Polymer Conductors and High-ZT Thermoelectrics |
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| Authors: | Jinfeng Han Yufeng Jiang Emma Tiernan Connor Ganley Yunjia Song Taein Lee Arlene Chiu Patty McGuiggan Nicholas Adams Paulette Clancy Thomas P Russell Patrick E. Hopkins Susanna M. Thon John D. Tovar Howard E. Katz |
| Affiliation: | 1. Department of Materials Science and Engineering and Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 USA Contribution: Conceptualization (equal), Investigation (lead), Methodology (lead), Writing - original draft (lead);2. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA Contribution: Formal analysis (supporting), Methodology (supporting);3. Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904 USA Contribution: Formal analysis (supporting), Methodology (supporting), Writing - original draft (supporting);4. Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 USA Contribution: Formal analysis (supporting), Investigation (supporting), Writing - original draft (supporting);5. Department of Materials Science and Engineering and Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 USA Contribution: Investigation (supporting), Methodology (supporting);6. Department of Electrical and Computer Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 USA Contribution: Investigation (supporting), Methodology (supporting);7. Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 USA Contribution: Formal analysis (supporting), Funding acquisition (supporting), Investigation (supporting), Methodology (equal), Project administration (supporting), Supervision (equal), Writing - review & editing (supporting);8. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 USA Contribution: Formal analysis (supporting), Supervision (supporting);9. Department of Mechanical and Aerospace Engineering, University of Virginia, Charlottesville, VA 22904 USA Department of Materials Science and Engineering, University of Virginia, Charlottesville, VA 22904 USA Department of Physics, University of Virginia, Charlottesville, VA 22904 USA Contribution: Conceptualization (supporting), Methodology (equal), Supervision (supporting), Writing - review & editing (supporting);10. Department of Electrical and Computer Engineering, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 USA Contribution: Formal analysis (supporting), Methodology (supporting), Supervision (supporting);11. Department of Materials Science and Engineering and Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 USA Contribution: Investigation (supporting), Methodology (supporting), Supervision (supporting);12. Department of Materials Science and Engineering and Department of Chemistry, Johns Hopkins University, 3400 North Charles Street, Baltimore, MD 21218 USA |
| Abstract: | N-Type thermoelectrics typically consist of small molecule dopant+polymer host. Only a few polymer dopant+polymer host systems have been reported, and these have lower thermoelectric parameters. N-type polymers with high crystallinity and order are generally used for high-conductivity ( ) organic conductors. Few n-type polymers with only short-range lamellar stacking for high-conductivity materials have been reported. Here, we describe an n-type short-range lamellar-stacked all-polymer thermoelectric system with highest  of 78 S−1, power factor (PF) of 163 μW m−1 K−2, and maximum Figure of merit (ZT) of 0.53 at room temperature with a dopant/host ratio of 75 wt%. The minor effect of polymer dopant on the molecular arrangement of conjugated polymer PDPIN at high ratios, high doping capability, high Seebeck coefficient (S) absolute values relative to  , and atypical decreased thermal conductivity ( ) with increased doping ratio contribute to the promising performance. |
| Keywords: | All-Polymer Thermoelectrics Electrical Conductivity Power Factor Semiconducting Polymer ZT |