Solution-state doping-assisted aggregates for enhancing thermoelectric properties of an amorphous polymer
발표자
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초록
내용
Molecular doping is the performance-determining step for thermoelectric conjugated polymers. Although strongly oxidizing salt-type dopants effectively produce charge carriers in polymer chains, their poor solubility in the processing solvents leads to undesired precipitation and complicates the film fabrication process. Thus, it is important to develop a conjugated polymer that can be readily doped in a mixed solution using organic dopants. In this study, we synthesized amorphous but highly electron-rich polymers (PCTs). The amorphous polymers were heavily doped with the organic dopant F4TCNQ, and the resulting PCT:F4TCNQ complex formed an integer charge transfer complex and promoted the intermolecular ordering of PCT polymers. Notably, the PCT:F4TCNQ complex exhibited unique thermoelectric behaviors, with significantly increased power factors even in the presence of large quantities of F4TCNQ, reaching values 3.2-fold higher than those achieved with FeCl3 sequential doping.