| 초록 |
This study presents CuI as a transparent and foldable thermoelectric material which can be applied for thermoelectric generators. The thermoelectric properties of CuI thin films are optimized by iodine doping at specific doping concentration. The power factor of 0.1 at% iodine doped CuI thin film is optimized to be 798.9 μW m-1 K-2 with Seebeck coefficient of 194 μV K-1 and electrical conductivity of 212.3 S cm-1 which is 10 times higher than that of the undoped CuI thin film. Furthermore, thermal conductivity of the iodine doped CuI thin films is decreased to 0.46 W m-1 K-1, due to the introduction of heavy iodine and induced phonon scattering effect. Accordingly, we achieve a large thermoelectric figure of merit of ZT = 0.52 at 300 K for the iodine doped CuI thin films. We will also demonstrate a transparent and foldable TE generator based on the iodine doped CuI by spray printing process. |
