1. Technology Reliability Team, OLED Business, Samsung Display Company, Limited, 181 Samsung-ro, Tangjeong-myeon, Asan-si 31454, Republic of Korea
2. Department of Semiconductor and Display Engineering, Sungkyunkwan University, Cheoncheon-dong 300, Jangan-gu, Suwon-si 16419, Republic of Korea
3. Department of Electrical and Computer Engineering, Sungkyunkwan University, Cheoncheon-dong 300, Jangan-gu, Suwon-si 16419, Republic of Korea