1Department of Physics and Centre for Plastic Electronics, Blackett Laboratory, Imperial College London, London, SW7 2AZ UK
2Dutch Polymer Institute (DPI), P.O. Box 902, 5600 AX, Eindhoven, the Netherlands
3Institute of Electronic Structure and Laser (IESL), Foundation for Research and Technology-Hellas (FORTH), Heraklion, 71003, Greece
4Materials Science & Technology Department University of Crete Heraklion 71003 Greece
5Institute of Chemical Engineering and High Temperature Processes (ICEHT), Foundation of Research and Technology Hellas (FORTH), Stadiou Strasse Platani, P.O. Box 1414, Patras, GR-265 04 Greece
6Center of Materials Technology and Photonics and Electrical Engineering Department, Technological Educational Institute (TEI) of Crete, Heraklion, 71004 Greece
7Physics Department, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
8Cornell High Energy Synchrotron Source, Wilson Laboratory, Cornell University, Ithaca, NY 14853, USA
9Materials Science and Engineering Division of Physical Sciences and Engineering King Abdullah University of Science and Technology Thuwal 23955–6900 Saudi Arabia
10Department of Materials and Centre for Plastic Electronics, Imperial College London, London Royal School of Mines, London, SW7 2AZ UK
