1. Compentence Center Nanoelectronics and Photonics, TH Mittelhessen-University of Applied Sciences, Giessen, Germany
2. Department of Electronic Engineering, Universitat Rovira i Virgili, Tarragona, Spain
3. AdMOS GmbH, Frickenhausen, Germany
4. Research Group Organic Electronics, Max Planck Institute for Solid State Research, Stuttgart, Germany