Collective fluorescence of graphene quantum dots on a surface

Optical Materials Express 2026 Open access

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Authors: Hugo Levy-Falk, Suman Sarkar, Thanh Trung Huynh, Daniel Medina-Lopez, Lauren Hurley, Océane Capelle, Muriel Bouttemy, Gaelle Trippe-Allard, Stéphane Campidelli, Loïc Rondin, Elsa Cassette, Emmanuelle Deleporte
+1 more Js Lauret
DOI: 10.1364/ome.583290
Cited by: 1
References: 33

Abstract

This study explores the organization of graphene quantum dots on the surface of monocrystalline halide perovskite. We show that graphene quantum dots tend to aggregate on the surface of perovskite, unlike in solution or on other substrates, even at a very low concentration of the initial solution that should yield single-molecule samples. Spectral analysis on small clusters shows a back-and-forth dynamical transition between an uncoupled, monomer-like state and an excimer state. Following this “dance” between states,a drastic one-way increase in fluorescence intensity, combined with a shortening of the excited state lifetime, has been observed on some clusters. This behavior is related to the emission of a collective state that may be a consequence of the dynamical organization of graphene quantum dots under illumination on the surface of the perovskite.

Fields of Study & Subjects

Carbon and Quantum Dots Applications Graphene research and applications Plasmonic and Surface Plasmon Research

Publication details

Journal / source
Optical Materials Express
Publisher
Optica Publishing Group
Volume
16
Issue
7
Pages
2032–2032
Publication date
17 February 2026
Language
EN