Dresden 2017 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 64: Poster: Photovoltaics and Optics
HL 64.25: Poster
Mittwoch, 22. März 2017, 15:00–19:00, P1C
Electric field controlled dopant distribution in P3HT Films — •Marc-Michael Barf1,2, Christian Willig1,2,3, Lars Müller1,2,3, Robert Lovrincic1,2, and Wolfgang Kowalsky1,2,3 — 1IHF, TU Braunschweig — 2InnovationLab, Heidelberg — 3KIP, Heidelberg University
Doping of organic semiconductors has become a common method to improve the efficiency of devices like organic light emitting diodes, organic solar cells and more recently also organic field effect transistors. So far in most devices doping is used statically to increase the conductivity of certain regions and to create space charge layers at interfaces in order to enhance charge transport. Here, the drift of p-type dopants like 2,3,5,6-Tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ) in films of Poly(3-hexylthiophene-2,5-diyl) (P3HT) is actively used to operate a device. We control the drift of the dopants in devices such as simple memristors and thereby switch those on and off by shifting highly conductive regions within the device. We explore this mechanism for possible application in an organic field effect transistor.