Regensburg 2016 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 90: Poster III
HL 90.22: Poster
Donnerstag, 10. März 2016, 16:00–19:00, Poster A
Improving electron injection and stability of metal electrodes in organic electronic devices with self-assembled monolayers on printing-relevant time-scales — •Sabina Hillebrandt1,2, Milan Alt2,3, Janusz Schinke2,4, Malte Jesper5, and Annemarie Pucci1,2 — 1Heidelberg University, KIP — 2InnovationLab GmbH, Heidelberg — 3Karlsruhe Instiute of Technology, LTI — 4TU Braunschweig, Inst. f. Hochfrequenztechnik — 5Heidelberg University, OCI
In organic semiconductor devices charge injection at the interface is important for the device performance. Charge injection can be improved by controlling the energy alignment at the interfaces, especially between metal contact and organic semiconductor. The thickness of these layers has to be very well defined to avoid any insulating or doping effects. Self-assembled monolayers (SAMs) in this case offer a beneficial way to produce such layers.
In our studies we work with molecules that allow a work function (WF) reduction of about 1.2eV on Gold and Silver contacts. Effects on the WF shift due to molecular orientation are investigated by IR reflection-absorption spectroscopy, the WF is investigated by Kelvin Probe measurements and photoelectron spectroscopy. Devices are fabricated focussing on printing feasibility and the improvement of device life time.