1. School of Electrical Engineering and Computer Science, Gwangju Institute of Science and Technology, Gwangju, South Korea
2. Department of Nanobio Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju, South Korea
3. Department of Energy Engineering, Intelligent Electrical Safety, Power Semiconductor Concentration, KENTECH Institute of Energy Materials and Devices, Korea Institute of Energy Technology (KENTECH), Naju, South Korea