Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through Doping
In this study, a benzodithiophene (BDT)-based donor (D)–acceptor (A) polymer containing carbazole segment in the side-chain was designed and synthesized and the thermoelectric composites with 50 wt % of single walled carbon nanotubes (SWCNTs) were prepared via ultrasonication method. Strong interfac...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-06-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/12/7/1447 |
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| author | Zhongming Chen Mengfei Lai Lirong Cai Wenqiao Zhou Dexun Xie Chengjun Pan Yongfu Qiu |
| author_facet | Zhongming Chen Mengfei Lai Lirong Cai Wenqiao Zhou Dexun Xie Chengjun Pan Yongfu Qiu |
| author_sort | Zhongming Chen |
| collection | DOAJ |
| description | In this study, a benzodithiophene (BDT)-based donor (D)–acceptor (A) polymer containing carbazole segment in the side-chain was designed and synthesized and the thermoelectric composites with 50 wt % of single walled carbon nanotubes (SWCNTs) were prepared via ultrasonication method. Strong interfacial interactions existed in both of the composites before and after immersing into the 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F<sub>4</sub>TCNQ) solution as confirmed by UV-Vis-NIR, Raman, XRD and SEM characterizations. After doping the composites by F<sub>4</sub>TCNQ, the electrical conductivity of the composites increased from 120.32 S cm<sup>−1</sup> to 1044.92 S cm<sup>−1</sup> in the room temperature. With increasing the temperature, the electrical conductivities and Seebeck coefficients of the undoped composites both decreased significantly for the composites; the power factor at 475 K was only 6.8 μW m<sup>−1</sup> K<sup>−2</sup>, which was about nine times smaller than the power factor at room temperature (55.9 μW m<sup>−1</sup> K<sup>−2</sup>). In the case of doped composites, although the electrical conductivity was deceased from 1044.9 S cm<sup>−1</sup> to 504.17 S cm<sup>−1</sup>, the Seebeck coefficient increased from 23.76 μV K<sup>−1</sup> to 35.69 μW m<sup>−1</sup> K<sup>−2</sup>, therefore, the power factors of the doped composites were almost no change with heating the composite films. |
| first_indexed | 2024-03-10T18:50:37Z |
| format | Article |
| id | doaj.art-a582392d1ce94148a8ff8b32b1584879 |
| institution | Directory Open Access Journal |
| issn | 2073-4360 |
| language | English |
| last_indexed | 2024-03-10T18:50:37Z |
| publishDate | 2020-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Polymers |
| spelling | doaj.art-a582392d1ce94148a8ff8b32b15848792023-11-20T05:11:39ZengMDPI AGPolymers2073-43602020-06-01127144710.3390/polym12071447Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through DopingZhongming Chen0Mengfei Lai1Lirong Cai2Wenqiao Zhou3Dexun Xie4Chengjun Pan5Yongfu Qiu6School of Environment and Civil Engineering, Dongguan Cleaner Production Technology Center, Dongguan University of Technology, Dongguan 523808, ChinaShenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, ChinaSchool of Environment and Civil Engineering, Dongguan Cleaner Production Technology Center, Dongguan University of Technology, Dongguan 523808, ChinaShenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, ChinaSchool of Chemistry, Sun Yat-sen University, Guangzhou 510275, ChinaShenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, ChinaSchool of Environment and Civil Engineering, Dongguan Cleaner Production Technology Center, Dongguan University of Technology, Dongguan 523808, ChinaIn this study, a benzodithiophene (BDT)-based donor (D)–acceptor (A) polymer containing carbazole segment in the side-chain was designed and synthesized and the thermoelectric composites with 50 wt % of single walled carbon nanotubes (SWCNTs) were prepared via ultrasonication method. Strong interfacial interactions existed in both of the composites before and after immersing into the 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F<sub>4</sub>TCNQ) solution as confirmed by UV-Vis-NIR, Raman, XRD and SEM characterizations. After doping the composites by F<sub>4</sub>TCNQ, the electrical conductivity of the composites increased from 120.32 S cm<sup>−1</sup> to 1044.92 S cm<sup>−1</sup> in the room temperature. With increasing the temperature, the electrical conductivities and Seebeck coefficients of the undoped composites both decreased significantly for the composites; the power factor at 475 K was only 6.8 μW m<sup>−1</sup> K<sup>−2</sup>, which was about nine times smaller than the power factor at room temperature (55.9 μW m<sup>−1</sup> K<sup>−2</sup>). In the case of doped composites, although the electrical conductivity was deceased from 1044.9 S cm<sup>−1</sup> to 504.17 S cm<sup>−1</sup>, the Seebeck coefficient increased from 23.76 μV K<sup>−1</sup> to 35.69 μW m<sup>−1</sup> K<sup>−2</sup>, therefore, the power factors of the doped composites were almost no change with heating the composite films.https://www.mdpi.com/2073-4360/12/7/1447organic thermoelectric materialspolymer compositespower factor |
| spellingShingle | Zhongming Chen Mengfei Lai Lirong Cai Wenqiao Zhou Dexun Xie Chengjun Pan Yongfu Qiu Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through Doping Polymers organic thermoelectric materials polymer composites power factor |
| title | Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through Doping |
| title_full | Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through Doping |
| title_fullStr | Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through Doping |
| title_full_unstemmed | Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through Doping |
| title_short | Boosting the Power Factor of Benzodithiophene Based Donor–Acceptor Copolymers/SWCNTs Composites through Doping |
| title_sort | boosting the power factor of benzodithiophene based donor acceptor copolymers swcnts composites through doping |
| topic | organic thermoelectric materials polymer composites power factor |
| url | https://www.mdpi.com/2073-4360/12/7/1447 |
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