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HL: Fachverband Halbleiterphysik

HL 76: Poster IIIC

HL 76.15: Poster

Donnerstag, 19. März 2020, 15:00–17:30, P2/4OG

Synthesis and nanoscale characterization of perovskite single crystals using scanning probe techniques — •Andrei Karabanov, Marianela Escobar, Vladimir V. Shvartsman, and Doru C. Lupascu — Institute for Materials Science and Center for Nanointegration Duisburg-Essen (CENIDE), University of Duisburg-Essen, Universitätsstraße 15, 45141 Essen, Germany

In the last ten years enormous efforts have been put into the research of hybrid perovskites as an absorbing material for solar cells. These materials show excellent photovoltaic properties not only in single, but also in tandem devices. However, the physical nature and the underlying mechanisms of such excellent photovoltaic performance are still unclear.

Here we report on solution growth of MAPbBr3 single crystals. We studied the effect of the precursor concentration and temperature on the crystal quality. We found that the high concentrations of precursor in dimethylformamide solvent (0.9-1 g/ml) and the temperature range of 40-50 °C are optimal to get good quality cubic-shaped MAPbBr3 crystals with the (110) orientation. The dielectric, ferroelectric, and photovoltaic properties of the crystals are studied in details both macroscopically and locally.