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DS: Fachverband Dünne Schichten

DS 15: Organic semiconductors: Transistors and OLEDs (Jointly with HL, CPP)

DS 15.4: Talk

Tuesday, April 1, 2014, 14:45–15:00, POT 081

Controlling morphology of a Vertical Organic Transistor for enhanced current gain and very low operation voltages — •Felix Kaschura, Axel Fischer, Björn Lüssem, Daniel Kasemann, and Karl Leo — Institut für Angewandte Photophysik, Technische Universität Dresden, 01062 Dresden

Vertical Organic Triodes represent a novel transistor technology enabling high current densities without the need for expensive structuring techniques. These devices require a permeable base for highly efficient operation. Therefore, we place a morphology modifying gold layer underneath the organic semiconductor, which enhances charge carrier transmission and thus the current gain. We have further studied a geometry optimization of the device structure allowing to tune the built-in field of the device. This results in an increased transmission as the built-in field at the collector actively gathers charge carriers, as well as a very low minimum operation voltage - both desirable characteristics for practical applications.