Regensburg 2019 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
CPP: Fachverband Chemische Physik und Polymerphysik
CPP 37: Poster Session III
CPP 37.28: Poster
Mittwoch, 3. April 2019, 11:00–13:00, Poster B1
Excimer formation in carbazole-based host materials for OLEDs — •Eimantas Duda1, Alexander Rudnick1, Sergey Bagnich1, Daniel Wagner2, Peter Strohriegl2,3, and Anna Köhler1,3 — 1Soft Matter Optoelectronics, Department of Physics, University of Bayreuth, Germany — 2Macromolecular Chemistry I, Department of Chemistry, University of Bayreuth, Germany — 3ayreuth Institute of Macromolecular Research, University of Bayreuth, Germany
We present a detailed spectroscopic study on bipolar OLED host materials in solution and in neat film from 10K to room temperature. The hole-transporting part is based on the carbazole moiety, while the electron-transporting part is based on triazine moiety. We find that the tendency to excimer formation depends sensitively on the planarity of the molecule, counterintuitively with more excimer formation for the planar ones. Quantum chemical calculations indicate that this results from excited state localization onto the outer carbazole moiety for the non-planar compounds.