1. Center for Optoelectronic Materials and Devices, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
2. Department of Materials Science and Engineering, Research Institute of Advanced Materials, Seoul National University, Seoul 08826, Republic of Korea
3. Division of Nano and Information Technology, KIST School, Korea University of Science and Technology of Korea (UST), Seoul 02792, Republic of Korea
4. Advanced Institute of Convergence Technology, Seoul National University, Suwon 16229, Republic of Korea
5. Post-Silicon Semiconductor Institute, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea
6. Department of Materials Science and Engineering, YU-KIST Institute, Yonsei University, Seoul 03722, Republic of Korea