Dresden 2017 – scientific programme
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 33: Organic Photovoltaics and Electronics I (joint session CPP/DS/HL, organized by HL)
CPP 33.4: Talk
Wednesday, March 22, 2017, 10:15–10:30, POT 81
Charge carrier dynamics in polar organic metal-insulator-semiconductor diodes — •Alexander Hofmann1, Simon Züfle2, Theresa Linderl1, Thomas Zechel1, Lars Jäger1, Stephane Altazin2, Beat Ruhstaller2, and Wolfgang Brütting1 — 1Institute of Physics, University of Augsburg, 86135 Augsburg, Germany — 2ZHAW School of Engineering, Technikumstrasse 9, 8401 Winterthur, Switzerland
Polar organic materials such as tris-(8-hydroxyquinolate) aluminum (Alq3), whose strong permanent dipole moment leads to a pronounced accumulation of charge carriers at the interface, can take the role of an insulator in a metal insulator semiconductor (MIS) diode. Thus, classic wide-bandgap insulators are replaced with polar organic materials. MIS diodes in conjunction with impedance spectroscopy (IS) and charge extraction experiments (e.g. CELIV), however, represent an established device geometry to investigate charge carrier dynamics and dielectric material properties. From temperature dependent MIS-CELIV and IS on organic MIS diodes with different hole transport materials, we are able to independently determine the activation energy of hopping transport as well as the barrier for charge injection.