Regensburg 2016 – wissenschaftliches Programm

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 30: Poster: Organic Electronics and Photovoltaics

CPP 30.30: Poster

Dienstag, 8. März 2016, 18:15–21:00, Poster B2

First Solution-Processed White OLEDs Exhibiting TTA Delayed Fluorescence — •Merve Welnhofer, Christian Töpel, Anne Köhnen, Jürgen Schelter, Dirk Hertel, and Klaus Meerholz — Department of Chemistry, University of Cologne, Luxemburger Str. 116, 50939 Cologne, Germany

In past decades organic light emitting diodes (OLED) have drawn much attention due to their superior properties over the established lighting and display technologies. Although OLEDs have already found their way into commercial products, a major drawback is loss of three quarters of electrically generated excitons due to radiationless relaxation from triplet excitons. One approach to solve is to collect the triplet excitons by energy transfer between two triplet excitons to generate a singlet exciton relax radiatively by means of triplet-triplet annihilation (TTA). So far many organic molecules revealing TTA with different emission wavelengths are reported however none of them was suitable for solution processable OLEDs. We report on the first solution processed TTA type multilayer OLEDs containing oxetane functionalized (crosslinkable) anthracene derivatives that are emitting in the blue, green, yellow and red wavelength region. To our knowledge these devices are the first fully solution-processed OLEDs revealing TTA delayed fluorescence (DF). Additionally, we used these materials to fabricate the first solution-processed white DF-OLEDs.