Dresden 2026 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 4: Perovskite and Photovoltaics: Synthesis and Performance
HL 4.1: Hauptvortrag
Montag, 9. März 2026, 09:30–10:00, POT/0251
X-ray nanodiffraction studies of lead-halide perovskite supercrystals — Jonas Hiller1, Robert Thalwitzer1, Ata Bozkurt1, Matheus Ferreira2, Richard Hodak1, Fabian Strauss1, Elke Nadler1, Gerard Hinsley3, Bihan Wang3, Kuan Hoon Ngoi3, Witold Rudzinski4, Ekaterina Kneschaurek1, Wojciech Roseker3, Michael Sprung3, Dmitry Lapkin1, Dmitry Baranov2, Frank Schreiber1, Ivan Vartanyants3, Marcus Scheele1, and •Ivan Zaluzhnyy1 — 1University of Tübingen — 2Lund University — 3Deutsches Elektronen-Synchrotron DESY — 4University of Krakow
We synthesize mechanically robust supercrystals built from cubic lead halide perovskite nanocrystals by a two-layer phase diffusion self-assembly with acetonitrile as the antisolvent. This method yields highly faceted thick supercrystals, which are robust enough to be picked up and relocated by microgrippers. We employed X-ray nanodiffraction together with high-resolution scanning electron microscopy and atomic force microscopy to reveal the structure of CsPbBr3, CsPbBr2Cl, and CsPbCl3 supercrystals and explain their unusual mechanical robustness. We show that the removal of organic ligands from perovskite nanocrystals results in a size gradient of the nanocrystals within the supercrystals.
Hiller et al., ACS Nano 19 (2025) 26117
Keywords: Supercrystal; X-ray; Perovskite; Superlattice; Diffraction