Abschlussarbeiten - Master
Top-gate oFETs with printed SD-contacts
Art der Abschlussarbeit
Master
Autoren
- Afzal, Muhammad Najeeb
Betreuer
- Prof. Dr.-Ing. Andreas Richter
- Dr.-Ing. Matthias Plötner
Abstract
Organic field-effect transistors (OFETs) are the core switching element for future large area thin film electronics on plastics. In order to end up with completely printed devices, the source/drain-contacts need to printed, too. Compared to commonly vacuum deposited and lift-off patterned metallic gold electrodes printed contacts usually suffer from, comparatively wide spacing, edge and surface roughness, additional surface residues and sometimes worse work function alignment that reduce contact performance. This thesis work focuses on using ultrasonic fluid dispenser technology for printing OFETs. It elaborated upon the capabilities of this technology and showing that minimum channel length of 10-15 μm was achieved with line width of printed electrodes around 63-66 μm. Further, bottom-gate transistor on Si substrates were fabricated and characterized. OFETs with mobility of 1E-4, ION/IOFF ratio of 350 and Vth of 6 V were made. Top-gate OFETs were fabricated and characterized. Top-gate OFETs showed extremely low current values in the order of E-10. Further, OFETs on plastics substrate were attempted.
Schlagwörter
-
Berichtsjahr
2018