<em>Time-dependent Measurements for Characterizing Ionic Contribution of Thermoelectric Performance of Polymer/Ionic Liquid Structure</em>
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내용
Elctrochemical doping using organic electrochemical transistors (OECTs) offers a distinct advantage for investigating the thermoelectric (TE) performance of organic TE materials. This method allows precise tuning of the doping level by modulating the applied gate voltage. Therefore, electrochemical doping provides an easy way to study the TE performance of organic TE materials. While previous research has primarily focused on polymer doping, limited attention has been given to the influence of the ionic liquid (IL) on Seebeck coefficient. Here, our main goal is to investigate the effects of IL on TE performance when utilizing OECT for TE measurements. We conducted time-dependent measurements to study the contributions of ions and electrons in OECT. We observed that the polymer/IL structure enhances the Seebeck coefficient compared to the polymer without IL. This enhancement can be attributed to the uptake of ion pairs in the polymer matrix.