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HL: Fachverband Halbleiterphysik

HL 7: Poster I

HL 7.35: Poster

Monday, March 27, 2023, 13:00–15:00, P2/EG

Optical spectroscopy on hBN-encapsulated perovskites — •Lisa Böhme, Eugen Klein, Rico Schwartz, Christian Klinke, and Tobias Korn — University of Rostock, Institute of Physics, 18059 Rostock, Germany

Perovskites shows promising optoelectronic properties that can be used in a wide range of technologies. For example, they play a central role in the development of more efficient and low-cost solar cells and are also used in LED or low-threshold lasers. However, they pose experimental challenges that need to be solved: perovskites degrade in contact with air and lose their attractive properties. A possibility to avoid this is encapsulation in hexagonal Boron Nitride (hBN). We have examined how lead-halogen perovskites with organic ligands can be encapsulated and whether they retain their stability. We use the Scotch-Tape method to exfoliate hBN crystals and deposit perovskite crystals on top using drop casting. To check the successful encapsulation of the perovskites, photoluminescence measurements were taken over different time periods and at different temperatures. Our measurements showed that the fully encapsulated perovskites remained stable for more than ten days.