Regensburg 2022 – scientific programme

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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 12: Poster 1

CPP 12.72: Poster

Monday, September 5, 2022, 18:00–20:00, P1

Optically detected magnetic resonance of OLED materials using a confocal microscope — •Pascal Schady, Fabian Binder, Mona Löther, Vladimir Dyakonov, and Andreas Sperlich — Experimental Physics VI, Julius Maximilian University of Würzburg, 97074 Würzburg

Optically detected magnetic resonance (ODMR) is a specialized technique to investigate spin-dependent optical transitions in solids. This method is also applicable for examining photoluminescence characteristics of semiconducting organic materials which are becoming increasingly popular for, e.g. display applications. In typical ODMR setups a laser beam is guided into a microwave-cavity from one side while the emission spectrum of the sample is detected from the other. To improve upon that, we build a confocal microscope around the cavity, such that white light as well as a laser beam are guided through the cavity opening onto the sample, allowing us to locally excite sample spots while monitoring the laser spot and photoluminescence through a camera and photodetector. By implementing these upgrades we aim to enhance sensitivity while also enabling improved control over the investigated sample spot in order to highlight excited state spin physics processes of potential organic light emitting diode materials.