Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 30: Poster: Organic Electronics and Photovoltaics
CPP 30.27: Poster
Dienstag, 8. März 2016, 18:15–21:00, Poster B2
Charge Transport in Donor-Acceptor Polymeric Systems under Electric Fields — •Anja Förster1,2, Florian Günther1,2,3, Sibylle Gemming2,3, and Gotthard Seifert1,2 — 1Theoretical Chemistry, TU Dresden, Dresden, Germany — 2Center for Advancing Electronics Dresden (cfaed), Dresden, Germany — 3Helmholtz-Zentrum Dresden-Rossendorf, Dresden, Germany
Printable and foldable organic transistors are meant to revolutionize electronic applications. However, in comparison to their silicon counterparts their performance is currently still lacking. Thus, we investigate possible options of improving the charge transport in donor-acceptor polymers via DFT calculations.
The first focus point is the influence of gate-induced electric fields. Here, we concentrate on the preferable orientation of diketopyrrolopyrrole-dithienylthieno[3,2-b]thiophene (DPPT-TT) inside the transistor. We further analyze if source-drain induced electric fields have to be taken into consideration when describing the transport in DPPT-TT. We show that strong electric fields are required to yield significant changes in the transport properties.
A second option to improve the charge transport process is to functionalize DPPT-TT via fluoroalkyl chains. Here, the fluorine atoms introduce dipole fields and electron withdrawing sites. We concentrate on finding the composition of fluoroalkyl chains that yields the highest improvement in the charge transport process.