1. Department
of Materials Science and Engineering, Pohang University of Science and Technology (POSTECH), 77 Cheongam-ro, Nam-gu, Pohang, Gyungbuk 790-784, Republic of Korea
2. Samsung Display Co., Ltd., 95
Samsung 2-ro, Giheung-gu, Yongin-city, Gyeonggi-Do 446-711, Republic of Korea