Revealing the True Nature of Double‐Peak Emission in 2D Perovskite Single Crystals Using Polariton Waveguides

Year: 2025

Type: article

Abstract: In recent years, hybrid organic–inorganic perovskites have attracted great interest due to their intriguing properties, which make them ideal for a wide range of optoelectronic applications. This work provides new insights into the understanding of the structure‐property relationship in Dion–Jacobson perovskites and demonstrates that their exciton characteristics can be easily tuned through distortion of the crystalline lattice. Moreover, an explanation is offered for the double‐peak emission frequently observed in these materials, whose nature is widely debated in the literature. To investigate this, size‐controlled crystalline microwires are synthesised using a microfluidic‐assisted synthesis technique and integrated them into a nanophotonic device to explore their behaviour in the strong coupling regime. The findings unambiguously demonstrate that such anomalous emission is related to polariton modes arising from strong light‐matter interactions between the waveguided modes confined in perovskite microwires and perovskite excitons.

Source: Advanced Optical Materials

DOI: 10.1002/adom.202500299

Authors: Annalisa Coriolano, Anna Moliterni, Francesco Todisco, Laura Polimeno, Rosanna Mastria, Vincent Olieric, Carlotta Giacobbe, Milena De Giorgi, Dario Ballarini, Aurora Rizzo, Giuseppe Gigli, Cinzia Giannini, Ilenia Viola, Daniele Sanvitto, Luisa De Marco

Institutions: Istituto di Nanotecnologia, Institute of Crystallography, Paul Scherrer Institute, Swiss Light Source, European Synchrotron Radiation Facility, University of Salento, National Research Council, Sapienza University of Rome

Language: English

Topic: Perovskite Materials and Applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,880

Funders: European Commission, Fundação de Amparo à Pesquisa do Estado de São Paulo, Russian Foundation for Basic Research, Ministero dell’Istruzione, dell’Università e della Ricerca, Consiglio Nazionale delle Ricerche, Ministero degli Affari Esteri e della Cooperazione Internazionale, Regione Puglia, Ministero dell'Università e della Ricerca, HORIZON EUROPE European Innovation Council, NextGenerationEU

OpenAlex ID: W4411283468