Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 20: Poster I
HL 20.24: Poster
Dienstag, 18. März 2025, 10:00–12:30, P3
Hysteretic Piezochromism in a two-dimensional perovskite — •Paul Steeger1, Mohammad Adnan1, Thorsten Deilmann2, Xiang Li3,4, Susanne Müller4, Katarzyna Skrzynska5, Michael Hanfland4, Efim Kolesnikov3, Jutta Kösters6, Theresa Block6, Robert Schmidt1, Ilya Kupenko3,4, Carmen Sanchez-Valle3, Vijaya Prakash7, Steffen Michaelis de Vasconcellos1, and Rudolf Bratschitsch1 — 1Physikalisches Institut Universität Münster — 2Institut für Festkörpertheorie Universität Münster — 3Institute für Mineralogie Universität Münster — 4Europäischer Synchrotron ESRF Grenoble — 5Institute of Earth Sciences University of Silesia — 6Institut für Anorganische und Analytische Chemie Universität Münster — 7Department of Physics IIT Dehli
Two-dimensional inorganic-organic hybrid perovskites hold potential for application in the field of optoelectronics. One representative of this class of materials is cyclohexenyl-eythylammonium lead-iodide (CHPI). Here, we present pressure-dependent optical absorption and emission spectra of CHPI. We find a strong change of the band gap when exerting pressure on the crystal using a diamond anvil cell. In contrast to other 2D perovskites the bandgap of CHPI undergoes a full hysteresis loop under pressure. To reveal the origin of the observed phenomena, we combine our optical experiments with DFT calculations as well as X-ray diffraction measurements under high pressure. Reference: Steeger et al., Hysteretic Piezochromism in a Lead Iodide-Based Two-Dimensional Inorganic-Organic Hybrid Perovskite. JACS 146, 23205 (2024)
Keywords: Perowskite; Hochdruck; 2D-Halbleiter