Affiliation: | 1. School of Materials Science and Engineering, Gwangju Institute of Science and Technology, Buk‐gu, Gwangju, South Korea;2. Korea Photonics Technology Institute, Buk‐gu, Gwangju, South Korea;3. Creative Future Research Laboratory, Electronics and Telecommunications Research Institute, Yuseong, Daejeon, South Korea;4. Department of Materials Science and Engineering, Korea University, Seongbuk‐gu, Seoul, South Korea |