Collective fluorescence of graphene quantum dots on a surface
Year: 2026
Type: article
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.
Source: Optical Materials Express
DOI: 10.1364/ome.583290
Authors: Hugo Levy-Falk, Suman Sarkar, Thanh Trung Huynh, Daniel Medina-Lopez, Lauren Hurley, Océane Capelle, Muriel Bouttemy, Gaëlle Trippé-Allard, Stéphane Campidelli, Loïc Rondin, Elsa Cassette, Emmanuelle Deleporte, Jean-Sébastien Lauret
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $1,843
Awards: Graphene quantum dots and nanoribbons for advanced optics, G2193896489, Nanographene for quantum technologies, Graphene Quantum Dot in Dielectric Nano-Cavity, Graphene Nanomeshes, G4995532701, Stable perovskites for solar cells, Paris-Saclay multidisciplinary Nano-Lab, Nanographen für Quantentechnologien
OpenAlex ID: W7129685877