Berlin 2018 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 46: Poster Session IV

CPP 46.27: Poster

Mittwoch, 14. März 2018, 11:00–13:00, Poster A

Optimization and Characterization of Blue OLEDs based on Molecular TADF Emitters — •Felix Klingert¹, Nikolai Bunzmann¹, Sebastian Weissenseel¹, Andreas Sperlich¹, Nikita Drigo², Mohammad Khaja Nazeeruddin², and Vladimir Dyakonov^1,3 — ¹Experimental Physics VI, Julius Maximilian University of Würzburg, 97074 Würzburg — ²Group for Molecular Engineering of Functional Materials, EPFL, CH-1951 Sion, Switzerland — ³Bayerisches Zentrum für Angewandte Energieforschung (ZAE Bayern), 97074 Würzburg

Realizing efficient and stable blue organic light emitting diodes (OLEDs) that meet display requirements has proven to be a challenging endeavor. Most organic molecules with a bandgap big enough to emit blue light suffer from either poor efficiency or a short lifespan. A modern approach of increasing efficiency is a process called thermally activated delayed fluorescence (TADF). Here, we fabricate blue OLEDs through thermal evaporation based on a molecular TADF emitter and characterize them by means of their current-electroluminescence-voltage characteristics, emission spectra and external quantum efficiency. From these measurements we draw conclusions about the electro-optical properties of the emitter molecules and their suitability as a material for blue OLEDs.