Regensburg 2016 – wissenschaftliches Programm
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CPP: Fachverband Chemische Physik und Polymerphysik
CPP 47: Poster: Interfaces and Thin Films
CPP 47.2: Poster
Mittwoch, 9. März 2016, 18:15–21:00, Poster B2
Mesostructured ZnO scattering layers for OLED applications — •Lorenz Bießmann1, Christoph J. Schaffer1, Johannes Schlipf1, Volker Körstgens1, Sigrid Bernstorff2, and Peter Müller-Buschbaum1 — 1TU München, Physik-Department, LS Funktionelle Materialien, 85748 Garching, Germany — 2Elettra Sincrotrone Trieste, 34012 Basovizza, Italy
By now the internal quantum efficiency of organic light-emitting diodes (OLEDs) reached values close to 1 but the overall efficiency still suffers on the extraction of the photons from the device. For further improvements of the performance one can apply a scattering layer to the device. Besides the direct structuring of the substrate surface, the attachment of a transparent layer on the substrate is a very promising approach. With an optical band gap of 3.3 eV, ZnO is a suitable material for this method. In this work ZnO is used as an additional layer on a glass substrate to achieve scattering abilities. For this purpose a structure giving diblock copolymer template was combined with sol-gel chemistry for tailoring the ZnO scattering layer. This yields thin mesostructured films. The film morphology as probed by scattering techniques and SEM is related to the spectral response to gain a structure-function relationship.