Dresden 2014 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 50: Organic semiconductors: Transistors and OLEDs (with CPP/DS)

HL 50.3: Vortrag

Dienstag, 1. April 2014, 14:30–14:45, POT 081

Lithographically processed vertical organic thin-film transistors (VOTFTs) — •Alrun Aline Günther1, Hans Kleemann2, Björn Lüssem3, Daniel Kasemann1, and Karl Leo11Institut für Angewandte Photophysik, TU Dresden, George-Bähr-Str. 1, 01069 Dresden Germany — 2Novaled AG, Tatzberg 49, 01307Dresden, Germany — 3Department of Physics, Kent State University, Kent, OH 44242, USA

Vertical organic transistors are a novel type of organic semiconductor devices, the first of such devices having been presented by Ma et al. in 2004[1]. The idea of this novel device concept is to overcome the limitations often faced in conventional organic thin-film transistors (OTFTs), where performance parameters (e.g. cut-off frequency or transconductance) are limited by the channel length of the OTFT. The VOTFT concept developed at IAPP[2] allows for downscaling of this channel length to the order of nanometres, while using a novel photolithography approach[3] to achieve patterning of the source electrode. In the present work, the effects of semiconductor film morphology and addition of dopant molecules are investigated for pentacene VOTFTs. It is expected that knowledge of such effects will give a more detailed insight into the fundamental functional principles of the device, as these are not yet well understood.

References [1] L. Ma et al, Appl. Phys. Lett. 85, 21 (2004) [2] H. Kleemann et al, Small, Epub ahead of print (2013) [3] H. Kleemann et al, Org. Elec. 13, 3 (2012)

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