1. Laboratory of Electronic Sensors, National TU of Athens, Zografou Campus, Athens 15780, Greece
2. Laboratory of Energy Systems, National and Kapodistrian University of Athens, Evia GR-34400, Greece
3. Department of Engineering, University of Campania “Luigi Vanvitelli”, Via Roma 29, 81031 Aversa, CE, Italy
4. Institute of Physics, SAS, Dúbravská Cesta 9, 845 11 Bratislava, Slovak Republic