Affiliation:
1. Department of Materials Science and Engineering National Taiwan University Taipei 10617 Taiwan
2. National Synchrotron Radiation Research Center Hsinchu 30076 Taiwan
3. Institute of Polymer Science and Engineering National Taiwan University Taipei 10617 Taiwan
4. Department of Organic Materials Science Graduate School of Organic Materials Science Yamagata University 4‐3‐16 Jonan Yonezawa Yamagata 992‐8510 Japan
5. Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei 10617 Taiwan
Abstract
AbstractThis study focuses on the fabrication of nanocomposite thermoelectric devices by blending either a naphthalene‐diimide (NDI)‐based conjugated polymer (NDI‐T1 or NDI‐T2), or an isoindigo (IID)‐based conjugated polymer (IID‐T2), with single‐walled carbon nanotubes (SWCNTs). This is followed by sequential process doping method with the small molecule 4‐(2,3‐dihydro‐1,3‐dimethyl‐1H‐benzimidazol‐2‐yl)‐N,N‐dimethylbenzenamine (N‐DMBI) to provide the nanocomposite with n‐type thermoelectric properties. Experiments in which the concentrations of the N‐DMBI dopant are varied demonstrate the successful conversion of all three polymer/SWCNT nanocomposites from p‐type to n‐type behavior. Comprehensive spectroscopic, microstructural, and morphological analyses of the pristine polymers and the various N‐DMBI‐doped polymer/SWCNT nanocomposites are performed in order to gain insights into the effects of various interactions between the polymers and SWCNTs on the doping outcomes. Among the obtained nanocomposites, the NDI‐T1/SWCNT exhibits the highest n‐type Seebeck coefficient and power factor of −57.7 µV K−1 and 240.6 µW m−1 K−2, respectively. However, because the undoped NDI‐T2/SWCNT exhibits a slightly higher p‐type performance, an integral p–n thermoelectric generator is fabricated using the doped and undoped NDI‐T2/SWCNT nanocomposite. This device is shown to provide an output power of 27.2 nW at a temperature difference of 20 K.
Funder
National Science and Technology Council
National Taiwan Normal University
Japan Society for the Promotion of Science
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
1 articles.
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