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HL: Fachverband Halbleiterphysik
HL 13: Poster I
HL 13.38: Poster
Montag, 18. März 2024, 15:00–18:00, Poster E
Circular Dichroism and Polarized Emission in Bismuth doped Methylbenzylamine Lead Iodide 2D Perovskites — •Jan-Heinrich Littmann1, Henrik Spielvogel1, 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
Organic-inorganic metal-halide perovskites are intriguing research materials due to their remarkable semiconductor properties and the potential applications ranging from photovoltaics to solid-state lighting and detectors. The incorporation of chiral organic cations into lead halide perovskites showcased chiroptical activity as well as chirality-induced spin selectivity. These characteristics hold promise for applications in emitters and detectors of circularly polarized light. Performance can be further boosted via doping and alloying. However, heterovalent doping using Bi3+ is currently not fully understood due to intricate structure-property relationship. We investigate a Bi3+-doped methylbenzylamine lead iodide model compound specifically on circular dichroism and emission polarization. Additionally, the substitution of Pb2+ by Bi3+ introduces free charges that lead to additional defects and dopants. Our objective is to uncover how structural factors impact circular dichroism, aiming to provide insights for designing materials with elevated chiroptical activity.
Keywords: Semiconductor; Microspectroscopy; Doped Perovskites; Circular Dichroism; Chiroptical Activity