17 research outputs found
Projekt AgeObstacleSim: Formalization and VR-based simulation of age-related obstacles - Ergebnisse aus der Formaliserung altersbedingter Hindernisse
Optical and magneto optical characterization of thin films of functionalized tetraphenylporphyrins
Dielectric function and magneto optical Voigt constant of Cu2O A combined spectroscopic ellipsometry and polar magneto optical Kerr spectroscopy study
Preparation of mesoscopic gold rings and split rings by selective wetting of the contact points between the spheres within colloidal crystals
Epitaxial growth and electronic properties of well ordered phthalocyanine heterojunctions MnPc F16CoPc
Long-term outcome for intrahepatic cholangiocellular carcinoma: Is stereotactic radiofrequency ablation the new standard of care?
Naphtalenediimide-based donor-acceptor copolymer prepared by chain-growth catalyst-transfer polycondensation: Evaluation of electron-transporting properties and application in printed polymer transistors
The semiconducting properties of a bithiophene-naphthalene diimide copolymer (PNDIT2) prepared by Ni-catalyzed chain-growth polycondensation (P1) and commercially available N2200 synthesized by Pd-catalyzed step-growth polycondensation were compared. Both polymers show similar electron mobility of ∼0.2 cm2 V-1 s-1, as measured in top-gate OFETs with Au source/drain electrodes. It is noteworthy that the new synthesis has several technological advantages compared to traditional Stille polycondensation, as it proceeds rapidly at room temperature and does not involve toxic tin-based monomers. Furthermore, a step forward to fully printed polymeric devices was achieved. To this end, transistors with PEDOT:PSS source/drain electrodes were fabricated on plastic foils by means of mass printing technologies in a roll-to-roll printing press. Surface treatment of the printed electrodes with PEIE, which reduces the work function of PEDOT:PSS, was essential to lower the threshold voltage and achieve high electron mobility. Fully polymeric P1 and N2200-based OFETs achieved average linear and saturation FET mobilities of >0.08 cm2 V-1 s-1. Hence, the performance of n-type, plastic OFET devices prepared in ambient laboratory conditions approaches those achieved by more sophisticated and expensive technologies, utilizing gold electrodes and time/energy consuming thermal annealing and lithographic steps. © 2014 the Partner Organisations