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Regensburg 2019 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 40: Perovskite and Hybrid Photovolatics I (joint session HL/CPP)

HL 40.2: Vortrag

Donnerstag, 4. April 2019, 09:45–10:00, H36

Enhanced stability and optical properties of perovskite nanocrystals encapsulated in block copolymer micelles — •Hyowon Jeong, Carola Lampe, Moritz Gramlich, and Alexander S. Urban — Nanospectroscopy Group, Department of Physics, Ludwig-Maximilians-Universität München (LMU), Amalienstraße 54, 80799, Munich, Germany

Recently, lead halide perovskites in the form of colloidal nanocrystals (NCs) have emerged as promising candidates for use in light-emitting and photovoltaic devices. High photoluminescence quantum yields as well as size- and consequently band gap- tuning are enabled by a facile synthesis and the natural defect tolerance of the material. However, to exploit these fascinating properties, long-term stability of the NCs under different conditions is necessary. Here, a novel synthesis is introduced, where methylammonium lead iodide (MAPbI3) NCs are grown inside of micelles formed by block copolymers, which protect the NCs from the environment and greatly enhance their lifetime. In addition, the optoelectronic properties of the encapsulated NCs will be discussed based on single NC spectroscopy results.

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