1. Department of Display Science and Engineering Hanyang University Seoul 04763 Republic of Korea
2. Department of Electronic Engineering Hanyang University Seoul 04763 Republic of Korea
3. Department of Chemical Engineering Hongik University Seoul 04066 Republic of Korea
4. Research and Development Center LG Display Company Paju 10845 Republic of Korea
5. Department of Materials Science and Engineering The University of Texas at Dallas Texas 75080 USA