Regensburg 2019 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 66: Organic Electronics and Photovoltaics V - Semiconducting Properties and Devices

CPP 66.7: Vortrag

Freitag, 5. April 2019, 11:45–12:00, H18

Electronic interactions in precursor solution of F4TCNQ doped P3HT polymers — •Vandana Tiwari1, Hong-Guang Duan1,2,3, Ajay Jha1, and R. J. Dwayne Miller1,3,41MPSD, Hamburg, Germany — 2I. Institut für Theoretische Physik, UH, Germany — 3CUI, Hamburg, Germany — 4University of Tornoto, Canada

Unraveling the favorable electronic interaction between dopant and polymer is the key to the success of molecular doping in organic semiconductors. Here we use two-dimensional electronic spectroscopy to explore the electronic dynamics of F4TCNQ-doped conducting polymer, P3HT in precursor solution mixtures. The electronic interactions among the ion-pairs formed in precursor solutions are captured in the form of off-diagonal peaks connecting the electronic states of polymer and dopant radicals. We have theoretically modeled our system to simulate the experimental data and achieve a quantitative picture of the Coulombic interaction between cation and anion radicals in solution. Our study reveals the heterogeneous electronic interactions that possibly serve as a seed for the structures in the spin-casted films.

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