1. School of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
2. Engineering Research Center (ERC) for Flexible Thermoelectric Device Technology, Daejeon 34141, Republic of Korea
3. Tegway Co. Ltd., #711 National Nano Fab., 291 Daehak-ro, Yuseong, Daejeon 34141, Republic of Korea