Vibronic effect and influence of aggregation on the photophysics of graphene quantum dots

Liu, Thomas; Tonnele, Claire; Zhao, Shen; Rondin, Loic; Elias, Christine; Medina-Lopez, Daniel; Okuno, Hanako; Narita, Akimitsu; Chassagneux, Yannick; Voisin, Christophe; Campidelli, Stephane; Beljonne, David und Lauret, Jean-Sebastien (2022): Vibronic effect and influence of aggregation on the photophysics of graphene quantum dots. In: Nanoscale, Bd. 14, Nr. 10: S. 3826-3833

Abstract

Graphene quantum dots, atomically precise nanopieces of graphene, are promising nano-objects with potential applications in various domains such as photovoltaics, quantum light emitters and bio-imaging. Despite their interesting prospects, precise reports on their photophysical properties remain scarce. Here, we report on a study of the photophysics of C96H24(C12H25) graphene quantum dots. A combination of optical studies down to the single molecule level with advanced molecular modelling demonstrates the importance of coupling to vibrations in the emission process. Optical fingerprints for H-like aggregates are identified. Our combined experimental-theoretical investigations provide a comprehensive description of the light absorption and emission properties of nanographenes, which not only represents an essential step towards precise control of sample production but also paves the way for new exciting physics focused on twisted graphenoids.

• Dokumententyp: Zeitschriftenartikel
• Fakultät: Physik
• Fakultätsübergreifende Einrichtungen: Center for NanoScience (CENS)
• Themengebiete: 500 Naturwissenschaften und Mathematik > 530 Physik ; 500 Naturwissenschaften und Mathematik > 500 Naturwissenschaften
• ISSN: 2040-3364
• Sprache: Englisch
• DFG: Gefördert durch die Deutsche Forschungsgemeinschaft (DFG) - 431450789