1. Department of Materials Science and Engineering Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Korea
2. Department of Applied Chemistry Kyung Hee University Yongin, Gyeonggi 17104 Korea
3. Department of Electrical and Computer Engineering Big Data Institute Inter-University Semiconductor Research Center Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Korea
4. Department of Electrical and Computer Engineering Institute of Advanced Machines and Design Seoul National University 1 Gwanak-ro, Gwanak-gu Seoul 08826 Korea