| 초록 |
A fully organic n-type thermoelectric (TE) materials were fabricated via a layer-by-layer method. In an effort to enhance TE properties in n-type organic thin films, hydrazine is introduced to the films where DWNT, stabilized by polyethylenimine, was alternately deposited with graphene, stabilized by polyvinylpyrrolidone. After doping these films for 5 min with hydrazine, electrical conductivity and Seebeck coefficient significantly increased. An 80 DWNT-PEI/graphene-PVP bilayer film (~320 nm in thickness) achieved a power factor as high as 380 µW m-1K-2 at room temperature. This result exhibited a two-fold improvement relative to that of un-doped films. The ability to engineer organic nanocomposites by effectively utilizing dopants, provides the possibility of realizing practical applications for high-performance, flexible, completely organic TE generators. |
