1. Department of Electro-Optical Engineering, National Taipei University of Technology, Taipei 106, Taiwan
2. Department of Chemistry, Photonic Materials Research Laboratory, NCU-Covestro Research Center, National Central University, Taoyuan 320, Taiwan
3. Institute of Organic and Polymeric Materials, National Taipei University of Technology, Taipei 106, Taiwan
4. National Synchrotron Radiation Research Center, Hsinchu 300, Taiwan
5. Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
6. Material & Chemical Research Laboratory, Industrial Technology Research Institute, Hsinchu 310, Taiwan