| 초록 |
Here we introduced the method to disperse conductive fillers, such as carbon nanotube (CNT), in polymer matrix to fabricate organic thermoelectric generators. Since CNTs are vulnerable to aggregation due to strong Van der Waals attraction between them, it can be said that well-dispersed CNTs in the polymer matrix is important to fabricate high performance thermoelectric generators. In order to resolve this issue, carboxylated polyvinyl alcohol (PVA-COOH) was used as both a polymer matrix and dispersant, well-dispersed CNTs in PVA-COOH matrix could be realized by forming covalent bond with amine-functionalized single-walled CNT by chemical reaction. As a result, thermoelectric generators consisting of well-dispersed CNTs showed high power factor of 275 μW/mK2 with free-standing property. Furthermore, the fabricated devices maintained their performance after 500 times of bending, which shows feasibility for flexible organic thermoelectric generator application. |
