DataVXThe Journal of Physical Chemistry LettersPaper
journal article·2025-10-02Open access

Emergence of Intrinsic One-Dimensional Excitons in Colloidal Bi13S18I2 Nanocrystals

Maximilian Lang, Kostas Fykouras, Markus Döblinger, Olivier Henrotte, Peter Müller-Buschbaum, Emiliano Cortés, Jacek K. Stolarczyk, Linn Leppert, Quinten A. Akkerman

The Journal of Physical Chemistry Letters· Volume 16· Issue 39
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Source abstract

Abstract

We present a synthesis method for colloidal nanocrystals exhibiting a one-dimensional Peierls-like distortion in the form of size-tunable colloidal and monodisperse Bi 13 S 18 I 2 nanorods. The Bi 13 S 18 I 2 nanorods exhibit an absorption onset around 1.6 eV and an excitonic transition around 1.1 eV. First-principles calculations demonstrate that this intrinsic excitonic transition originates from one-dimensional excitons localized in the Bi 2+ columns formed within the Bi 13 S 18 I 2 lattice. In these columns, a Peierls-like distortion results in Bi 2+ dimerization and the formation of a Peierls bandgap, which is intrinsic to Bi 13 S 18 I 2 . This work demonstrates an exciting approach to induce excitonic properties in semiconductors without relying on traditional quantum confinement strategies, as well as opportunities to explore the spontaneous inherent symmetry breaking in nanocrystals. The Bi 13 S 18 I 2 nanorods also highlight the important role of colloidal chemistry in the discovery of complex materials and their optical properties and motivate further exploration of metal chalcohalide nanocrystals.
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Research context

NanomaterialsElectronic materials

OpenAlex topics: Quantum Dots Synthesis And Properties · Perovskite Materials and Applications · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Chair for Photonics and Optoelectronics, Nano-Institute Munich, Department of Physics, Ludwig-Maximilians-Universität (LMU), Königinstraße 10, 80539 Munich, Germany

MESA+ Institute for Nanotechnology

University of Twente

Department of Chemistry, Ludwig-Maximilians-Universität München, Butenandtstrasse 5-13 (E), 81377 Munich, Germany

Nanoinstitute Munich, Faculty of Physics

Ludwig-Maximilians-Universität München

Technical University of Munich, TUM School of Natural Sciences, Department of Physics, Chair for Functional Materials, James-Franck-Str. 1, 85748 Garching, Germany

Smoluchowski Institute of Physics, Faculty of Physics, Astronomy and Applied Computer Science, Jagiellonian University, Lojasiewicza 11, 30-348 Krakow, Poland

Funding

Bundesministerium für Bildung und Forschung · Uniwersytet Jagiellonski w Krakowie · Deutsche Forschungsgemeinschaft · Center for NanoScience, Ludwig-Maximilians-Universität München · Centre for Nano and Soft Matter Sciences · H2020 Marie Sklodowska-Curie Actions · Bayerisches Staatsministerium für Bildung und Kultus, Wissenschaft und Kunst · Solar Technologies go Hybrid · Ludwig-Maximilians-Universität München · Nederlandse Organisatie voor Wetenschappelijk Onderzoek · Free State of Bavaria · Länder

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