Journal Article

PUBDB-2026-00198

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Orientation-Driven Chirality Funnels in Chiral Low-Dimensional Lead-Halide Perovskite Heterostructures

Liu, S. (Corresponding author)Extern*XFEL.EU* ; Zerhoch, J. ; Heindl, M. W. ; Zhang, C. ; Kodalle, T. ; Sun, K. ; Shcherbakov, A. ; Bodnar, S.Extern*XFEL.EU* ; Miah, M. ; Gholipoor, M. ; Jandl, C. ; Pöthig, A. ; Ballmann, J. ; Sharp, I. D. ; Müller-Buschbaum, P.Extern* ; Sutter-Fella, C. M. ; Paetzold, U. W. ; Deschler, F. (Corresponding author)Extern*XFEL.EU*

2025
ACS Publications Washington, DC

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Please use a persistent id in citations: doi:10.1021/jacs.5c05172

Abstract: Chiral hybrid metal-halide perovskites show low-symmetry crystal structures, large Rashba splitting, spin-filtering, and strong chiroptical activity. Circular dichroism and circularly polarized photoluminescence have been investigated in chiral perovskites with increasingly distorted chiral structures. Here, we report the fabrication of chiral (R/S)-EBAPbI3 (EBA = α-ethylbenzylamine) single crystals, which possess highly distorted octahedral structures with a high angle variance value of ∼68 degree2. Using control in the fabrication conditions, we transfer chiral single crystals to thin films and achieve different crystal orientation preferences that induce tunable chiroptical properties to their heterostructures with PbI2 nanodomains, which we characterize with in situ X-ray diffraction and grazing-incidence wide-angle X-ray scattering measurements. Using transient chiroptical spectroscopies, we resolve photoexcited charge carrier dynamics and chirality transfer processes in such heterostructures down to cryogenic temperatures. We observe rapid carrier transfer along the in-plane (002) facets in chiral perovskite phases to PbI2 nanostructures within the initial few picoseconds, while carrier transfer along the out-of-plane (002) facets occurs at a slower rate. This fast transfer process leads to high photoluminescence intensities and large degrees of circular polarization in the emission from PbI2 nanodomains at cryogenic temperatures. Our findings report a multidimensional chiral-achiral heterostructure which takes advantage of controllable chirality transfer and offers new routes for future spintronic and chiroptical applications.

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Contributing Institute(s):

1. DOOR-User (DOOR ; HAS-User)

Research Program(s):

1. 6G3 - PETRA III (DESY) (POF4-6G3) (POF4-6G3)
2. FS-Proposal: I-20230055 (I-20230055) (I-20230055)
3. DFG project G:(GEPRIS)390776260 - EXC 2089: e-conversion (390776260) (390776260)

Experiment(s):

1. PETRA Beamline P03 (PETRA III)

Appears in the scientific report 2025

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Database coverage:
; BIOSIS Previews ; Biological Abstracts ; Chemical Reactions ; Clarivate Analytics Master Journal List ; Current Contents - Life Sciences ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF >= 15 ; Index Chemicus ; JCR ; Nationallizenz ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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