1. School of Electrical EngineeringKorea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
2. TEGway Co. Daejeon 34141 Republic of Korea
3. Korea Institute of Energy Research (KIER) Daejeon 34129 Republic of Korea
4. Flexible Thermoelectric Device Technology Center Daejeon 34141 Republic of Korea