[1
]Department of Electrical and Computer Engineering and Inter-University Semiconductor
Research Center; Seoul National University; 1 Gwanak-ro Gwanak-gu Seoul 08826 South
Korea
[2
]IoT Convergence Research Department; Electronics and Telecommunications Research Institute;
218 Gajeong-ro Yuseong-gu Daejeon 34129 South Korea
[3
]Department of Physics and Centre for Plastic Electronics; Imperial College London;
South Kensington Campus London SW7 2AZ UK
[4
]Chemistry Division; Los Alamos National Laboratory; Los Alamos NM 87545 USA
[5
]Soft I/O Interface Research Section; Electronics and Telecommunications Research Institute;
218 Gajeong-ro Yuseong-gu Daejeon 34129 South Korea
[6
]Departments of Electrical Science and Physics, Mathematical, Physical and Life Science
Division; University of Oxford; Oxford OX1 3PD UK