| 초록 |
Recently, thermoelectric (TE) materials, which can directly convert thermal energy into electricity, have attracted great attention for auxiliary power systems. Especially, nanocomposite system using organic materials blending with carbon nanotube (CNT) has a potential for realizing high performance flexible TE generators by improving the electrical conductivity. In this study, we designed a novel approach to improve TE performance of conjugated polymer/CNT nanocomposites by controlling the energy level differnce at the interface between conjugated polymers and CNTs. The synthesized conjugated polymer based on diketopyrrolopyrrole efficiently facilitates charge carrier transfer from polymer to CNT by reducing the work function difference between polymer and CNT compared to P3HT polymer, which results in highly increased Seebeck coefficient. This results shows the significant of controlling the potential barrier between polymer and CNT for obtaining the high TE performance. |
