1. POSTECH
Organic Electronics Laboratory, Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 790-784, Republic of Korea
2. Department
of Chemistry, Centre for Plastic Electronics, Imperial College London, London SW7 2AZ, U.K.
3. Center
for Nanoscale Materials, Argonne National Laboratory, 9700 S. Cass Avenue, Lemont, Illinois 60439, United States
4. Department of Polymer Science & Engineering and Department of IT Convergence, Korea National University of Transportation, Chungju 380-702, Republic of Korea