Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 30: Poster: Organic Electronics and Photovoltaics
CPP 30.15: Poster
Dienstag, 8. März 2016, 18:15–21:00, Poster B2
Diffusion of p-type Dopants in Organic Semiconductors — •Dongxiang Wang1,2, Lars Müller2,3,4, Sebastian Beck2,4, Robert Lovrincic2,3, Uli Lemmer1,2, and Wolfgang Kowalskty2,3 — 1KSOP, Karlsruhe Institute of Technology, Germany — 2InnovationLab, Heidelberg, Germany — 3IHF, TU Braunschweig, Germany — 4KIP, Heidelberg University, Germany
Molecular doping of organic semiconductors is routinely applied in various devices such as organic light emitting diodes. Nevertheless, issues like the diffusion of dopants are still not solved for many material combinations. In this work, we investigate if this diffusion can be controlled to improve device performance. The starting device is a diode with two gold electrodes evaporated onto a substrate and the organic semiconductor material (P3HT) doped with certain p-type dopants such as F4TCNQ. Chlorobenzene is used as solvent for the solution-fabricating process. To get a general understanding of how dopant diffusion can be controlled, we start with an application of an electric field. Conductivity measurements as well as IR and UV-Vis spectroscopy are performed for the investigation. We show that the dopant distribution in the matrix material can indeed be controlled via an applied electric field. We will discuss how this effect can be utilized to improve the performance of an organic field effect transistor.