Two‐Step Design Rule for Simultaneously High Conductivity and Seebeck Coefficient in Conjugated Polymer‐Based Thermoelectrics
Abstract The trade‐off between enhancing conductivity (σ) through doping while concurrently observing a reduction in the Seebeck coefficient (S) presents a key challenge in organic thermoelectrics. Here, a two‐step structural design strategy is developed, where the first step enhances the backbone p...
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Wiley
2025-01-01
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| Series: | Advanced Science |
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| Online Access: | https://doi.org/10.1002/advs.202409382 |
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| author | Zelong Li Wei Fu Dorothea Scheunemann Xiaoran Wei Maximilian Litterst Priya Mariam Viji Yong Cui Jianhui Hou Junhui Tang Ziqi Liang Zehua Qu Martijn Kemerink Ruiqian Guo Guangzheng Zuo |
| author_facet | Zelong Li Wei Fu Dorothea Scheunemann Xiaoran Wei Maximilian Litterst Priya Mariam Viji Yong Cui Jianhui Hou Junhui Tang Ziqi Liang Zehua Qu Martijn Kemerink Ruiqian Guo Guangzheng Zuo |
| author_sort | Zelong Li |
| collection | DOAJ |
| description | Abstract The trade‐off between enhancing conductivity (σ) through doping while concurrently observing a reduction in the Seebeck coefficient (S) presents a key challenge in organic thermoelectrics. Here, a two‐step structural design strategy is developed, where the first step enhances the backbone planarity which enhances the conductivity by an improved ordering of conjugated polymers (CPs). The second step, which is fluorination of the backbone, improves the Seebeck coefficient by the controlled induction of energetic disorder, stemming from the fluorine's disruption of the homogeneous electrostatic potential across the CP backbone. This strategy is applied to two series of donor‐acceptor (D‐A) types of CPs based on the BDT donor unit and BDD and TT as acceptor units, respectively. A maximum power factor (PF) over 155 (142.7 ± 12.7) µW m−1 K−2, coupled with S ≈202 (194.6 ± 7.6) µV K−1 is achieved, leading to up to 32‐fold enhancement of the PF compared to the initial non‐planar and non‐fluorinated polymer. This study provides valuable conceptual insights for designing CPs with high conductivity and Seebeck coefficient. |
| format | Article |
| id | doaj-art-6423090db76541a0a9d5d5b3c85b3da6 |
| institution | Kabale University |
| issn | 2198-3844 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advanced Science |
| spelling | doaj-art-6423090db76541a0a9d5d5b3c85b3da62025-01-09T11:44:46ZengWileyAdvanced Science2198-38442025-01-01121n/an/a10.1002/advs.202409382Two‐Step Design Rule for Simultaneously High Conductivity and Seebeck Coefficient in Conjugated Polymer‐Based ThermoelectricsZelong Li0Wei Fu1Dorothea Scheunemann2Xiaoran Wei3Maximilian Litterst4Priya Mariam Viji5Yong Cui6Jianhui Hou7Junhui Tang8Ziqi Liang9Zehua Qu10Martijn Kemerink11Ruiqian Guo12Guangzheng Zuo13Institute for Electric Light Sources School of Information Science and Technology Fudan University Shanghai 200433 P. R. ChinaInstitute for Electric Light Sources School of Information Science and Technology Fudan University Shanghai 200433 P. R. ChinaInstitute for Molecular Systems Engineering and Advanced Materials Heidelberg University Im Neuenheimer Feld 225 69120 Heidelberg GermanyInstitute for Electric Light Sources School of Information Science and Technology Fudan University Shanghai 200433 P. R. ChinaInstitute for Molecular Systems Engineering and Advanced Materials Heidelberg University Im Neuenheimer Feld 225 69120 Heidelberg GermanyInstitute for Molecular Systems Engineering and Advanced Materials Heidelberg University Im Neuenheimer Feld 225 69120 Heidelberg GermanyState Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaState Key Laboratory of Polymer Physics and Chemistry Beijing National Laboratory for Molecular Sciences CAS Research/Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 P. R. ChinaDepartment of Materials Science Fudan University Shanghai 200433 P. R. ChinaDepartment of Materials Science Fudan University Shanghai 200433 P. R. ChinaState Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular Science Fudan University Shanghai 200433 P. R. ChinaInstitute for Molecular Systems Engineering and Advanced Materials Heidelberg University Im Neuenheimer Feld 225 69120 Heidelberg GermanyInstitute for Electric Light Sources School of Information Science and Technology Fudan University Shanghai 200433 P. R. ChinaInstitute for Electric Light Sources School of Information Science and Technology Fudan University Shanghai 200433 P. R. ChinaAbstract The trade‐off between enhancing conductivity (σ) through doping while concurrently observing a reduction in the Seebeck coefficient (S) presents a key challenge in organic thermoelectrics. Here, a two‐step structural design strategy is developed, where the first step enhances the backbone planarity which enhances the conductivity by an improved ordering of conjugated polymers (CPs). The second step, which is fluorination of the backbone, improves the Seebeck coefficient by the controlled induction of energetic disorder, stemming from the fluorine's disruption of the homogeneous electrostatic potential across the CP backbone. This strategy is applied to two series of donor‐acceptor (D‐A) types of CPs based on the BDT donor unit and BDD and TT as acceptor units, respectively. A maximum power factor (PF) over 155 (142.7 ± 12.7) µW m−1 K−2, coupled with S ≈202 (194.6 ± 7.6) µV K−1 is achieved, leading to up to 32‐fold enhancement of the PF compared to the initial non‐planar and non‐fluorinated polymer. This study provides valuable conceptual insights for designing CPs with high conductivity and Seebeck coefficient.https://doi.org/10.1002/advs.202409382conductivityenergetic disorderfluorine substitutionorganic thermoelectricsseebeck coefficient |
| spellingShingle | Zelong Li Wei Fu Dorothea Scheunemann Xiaoran Wei Maximilian Litterst Priya Mariam Viji Yong Cui Jianhui Hou Junhui Tang Ziqi Liang Zehua Qu Martijn Kemerink Ruiqian Guo Guangzheng Zuo Two‐Step Design Rule for Simultaneously High Conductivity and Seebeck Coefficient in Conjugated Polymer‐Based Thermoelectrics Advanced Science conductivity energetic disorder fluorine substitution organic thermoelectrics seebeck coefficient |
| title | Two‐Step Design Rule for Simultaneously High Conductivity and Seebeck Coefficient in Conjugated Polymer‐Based Thermoelectrics |
| title_full | Two‐Step Design Rule for Simultaneously High Conductivity and Seebeck Coefficient in Conjugated Polymer‐Based Thermoelectrics |
| title_fullStr | Two‐Step Design Rule for Simultaneously High Conductivity and Seebeck Coefficient in Conjugated Polymer‐Based Thermoelectrics |
| title_full_unstemmed | Two‐Step Design Rule for Simultaneously High Conductivity and Seebeck Coefficient in Conjugated Polymer‐Based Thermoelectrics |
| title_short | Two‐Step Design Rule for Simultaneously High Conductivity and Seebeck Coefficient in Conjugated Polymer‐Based Thermoelectrics |
| title_sort | two step design rule for simultaneously high conductivity and seebeck coefficient in conjugated polymer based thermoelectrics |
| topic | conductivity energetic disorder fluorine substitution organic thermoelectrics seebeck coefficient |
| url | https://doi.org/10.1002/advs.202409382 |
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