Berlin 2024 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 28: Poster III

CPP 28.7: Poster

Mittwoch, 20. März 2024, 11:30–13:30, Poster C

Characterization of Differently Substituted Imidazo[1,5-a](iso)quinoline Thin Films for Applications as OLED Emitters — •Aaron Pieper¹, Thomas Oel², Pascal Schweitzer¹, Carina Rössiger², Richard Göttlich², and Derck Schlettwein¹ — ¹Institut für Angewandte Physik, Justus-Liebig-Universität Gießen — ²Institut für Organische Chemie, Justus-Liebig-Universität Gießen

Imidazo-[1,5-a]-quinolines and -iso-quinolines are characterized by an emission in the blue range of the visible spectrum. This can be particularly interesting for applications as emitter molecules in OLEDs. We prepared thin films of differently substituted quinolines and iso-quinolines by physical vapor deposition in high vacuum. Their growth mode on technically relevant contact phases like poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and indium tin oxide (ITO) was studied by non-contact atomic force microscopy. Spectroscopic studies of these thin films were conducted to assess their luminescence and absorbance/excitation properties. First steps were taken to incorporate these materials into a simple OLED layer stack based on PEDOT:PSS as a hole injector and bathocuproine (BCP) as an electron transport layer.

Keywords: organic light emitting diode; luminescence; film growth; physical vapor deposition; spin coating