Berlin 2024 – wissenschaftliches Programm
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HL: Fachverband Halbleiterphysik
HL 13: Poster I
HL 13.37: Poster
Montag, 18. März 2024, 15:00–18:00, Poster E
Circular Dichroism and Polarized Emission in Bismuth doped Pyridyl-ethylamine Lead Iodide 2D Perovskites — •Henrik Spielvogel1, Jan-Heinrich Littmann1, Philip Klement1, Lukas Gümbel1, Satoko Fukumori2, Hirokazu Tada2, and Sangam Chatterjee1 — 1Institute of Experimental Physics I, JLU Gießen, Germany — 2Graduate School of Engineering Science, Osaka University, Japan
The incorporation of chiral organic cations into lead halide perovskites enables the resulting 2D system to exhibit properties such as chiroptical activity and chirality-induced spin selectivity allowing the generation and detection of circularly polarized light. Doping and alloying serve to modify and enhance the properties and performance of such materials. When doping with cations of differing charge to the constituting Pb2+ ions, defect creation is inevitable and the effects on chiroptical activity are not yet known due to complex structure-property relationships and experimental limitations.
Here, we present Bi2+-doped pyridyl-ethylamine lead iodide as a model compound for doped chiral lead iodide perovskites. Through polarization-resolved spectroscopy, we characterize the relationship between circular dichroism and structural factors. This analysis offers valuable insights for designing new materials with high chiroptical activity.
Keywords: Polarization; Circular Dichroism; Chiroptical Activity; Doped Perovskites; Chiral Organic Cations