1. Organic
Nanoelectronics Laboratory, Department of Chemical Engineering, School
of Applied Chemical Engineering, Kyungpook National University, Daegu 41566, Republic of Korea
2. Priority
Research Center, Research Institute of Advanced Energy Technology, Kyungpook National University, Daegu 41566, Republic of Korea
3. Department
of Physics, Division of Mathematical, Physical and Life Sciences, University of Oxford, Oxford OX1 3PD, United Kingdom