Effect of Side Chain Substituent Volume on Thermoelectric Properties of IDT-Based Conjugated Polymers |
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| Authors: | De-Xun Xie Tong-Chao Liu Jing Xiao Jing-Kun Fang Cheng-Jun Pan Guang Shao |
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| Affiliation: | 1.School of Chemistry, Sun Yat-sen University, Guangzhou 510275, China; (D.-X.X.); (J.X.);2.Shenzhen Research Institute, Sun Yat-sen University, Shenzhen 518057, China;3.Shenzhen Key Laboratory of Polymer Science and Technology, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China; (T.-C.L.); (C.-J.P.);4.School of Chemical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China |
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| Abstract: | A p-type thermoelectric conjugated polymer based on indacenodithiophene and benzothiadiazole is designed and synthesized by replacing normal aliphatic side chains (P1) with conjugated aromatic benzene substituents (P2). The introduced bulky substituent on P2 is detrimental to form the intensified packing of polymers, therefore, it hinders the efficient transporting of the charge carriers, eventually resulting in a lower conductivity compared to that of the polymers bearing aliphatic side chains (P1). These results reveal that the modification of side chains on conjugated polymers is crucial to rationally designed thermoelectric polymers with high performance. |
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| Keywords: | organic thermoelectric materials conjugated polymers power factor |
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