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HL: Fachverband Halbleiterphysik

HL 50: Perovskite and photovoltaics IV (joint session HL/CPP)

HL 50.8: Vortrag

Mittwoch, 18. März 2020, 17:15–17:30, POT 251

Temperature-dependent high spatial-resolution spectroscopy to investigate NCs in single micelles — •Markus Schoger, Carola Lampe, Moritz Gramlich, and Alexander Urban — Nanospectroscopy Group, Department of Physics, Ludwig-Maximilians-Universität, Munich, Germany

Halide perovskite nanocrystals (NCs) have shown outstanding potential for light-emitting applications with high quantum yields and an emission wavelength tunable throughout the visible spectrum. Despite these impressive advances, they still suffer from several issues, which currently impede widespread commercialization. To enhance their stability, we recently introduced a colloidal synthesis, wherein the NCs are grown inside diblock copolymer micelles.1 These nanoreactors additionally provide a protective shell, limiting degradation and ion migration. In order to maximize their potential and enable optoelectronic integration, an in-depth understanding of the nanostructure structure and resulting properties on a single micelle level is critical. Here, we present temperature-dependent high spatial-resolution spectroscopy to investigate single micelle-encapsulated perovskite NCs in temperature intervals from 4 K up to room temperature to gain insight into their fundamental properties.

1 V. A. Hintermayr, C. Lampe, M. Low, J. Roemer, W. Vanderlinden, M. Gramlich, A. X. Bohm, C. Sattler, B. Nickel, T. Lohmuller, and A. S. Urban, Nano Lett. 19 (8), 4928 (2019).