1. Centre
for Plastic Electronics, Department of Physics, Blackett Laboratory, Imperial College London, London SW7 2AZ, United Kingdom
2. Plastic Logic Ltd., 34 Cambridge Science Park, Cambridge CB4 0FX, United Kingdom
3. School
of Physics and Astronomy, Cardiff University, Queens Buildings, The Parade, Cardiff CF24 3AA, United Kingdom
4. Masdar Institute of Science and Technology,
P.O. Box 54224, Abu Dhabi, United Arab Emirates