Regensburg 2022 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 25: Poster 1

HL 25.46: Poster

Wednesday, September 7, 2022, 18:00–20:00, P2

Time-Resolved Nanoscale X-ray Analysis to Investigate Luminescence Dynamics of Co in ZnO-Material Systems — •Adrian Nowotnick¹, Christian Plass¹, Valentina Bonino², Maurizio Ritzer¹, Lukas Jäger¹, Jaime Segura-Ruiz², Gema Martinez-Criado², and Carsten Ronning¹ — ¹Institut für Festkörperphysik, Friedrich-Schiller-Universität Jena, Max-Wien-Platz 1, 07743, Jena — ²ESRF - The European Synchrotron, 71 Avenue des Martyrs, 38043 Grenoble, France

High resolution synchrotron based methods like X-ray fluorescence (XRF) and X-ray exited optical luminescence (XEOL) are well established characterization techniques. A highly focused X-ray nanobeam at the ID16B-NA station of the European Synchrotron Radiation Facility provides an excellent spatial resolution of about 50nm. This enables compositional mapping of nanometerials. Uniquely, the beam line was equipped with a streak camera allowing analysis of the spectral dynamics of optical luminescence. Consequently, one can investigate the influence of elemental compositions and local environments on the emission properties of e.g. color centers in semiconductor nanomaterials. These are able to provide high quality single photon emitters, which have drawn a lot of interest in recent years. Simultaneous XRF and XEOL measurements of Co in ZnO systems were conducted and by analyzing the emitted X-ray fluorescence radiation together with the corresponding optical luminescence correlating maps were obtained. Additionally, the dynamic of the luminescence could be determined depending on the Cobalt concentration and the system morphology.