Non-Blinking Luminescence from Charged Single Graphene Quantum Dots

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 35(2023), 40 vom: 07. Okt., Seite e2304074
1. Verfasser:	Fu, Wei (VerfasserIn)
Weitere Verfasser:	Yin, Jiefu, Cao, Huaqiang, Zhou, Zhongfu, Zhang, Junying, Fu, Jingjing, Warner, Jamie H, Wang, Cheng, Jia, Xiaofang, Greaves, G Neville, Cheetham, Anthony K
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2023
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article Auger recombination charged trions graphene quantum dots non-blinking single quantum dots

Beschreibung
Zusammenfassung:	© 2023 Wiley-VCH GmbH. Photoluminescence blinking behavior from single quantum dots under steady illumination is an important but controversial topic. Its occurrence has impeded the use of single quantum dots in bioimaging. Different mechanisms have been proposed to account for it, although controversial, the most important of which is the non-radiative Auger recombination mechanism whereby photocharging of quantum dots can lead to the blinking phenomenon. Here, the singly charged trion, which maintains photon emission, including radiative recombination and non-radiative Auger recombination, leads to fluorescence non-blinking which is observed in photocharged single graphene quantum dots (GQDs). This phenomenon can be explained in terms of different energy levels in the GQDs, caused by various oxygen-containing functional groups in the single GQDs. The suppressed blinking is due to the filling of trap sites owing to a Coulomb blockade. These results provide a profound understanding of the special optical properties of GQDs, affording a reference for further in-depth research
Beschreibung:	Date Revised 04.10.2023 published: Print-Electronic Citation Status Publisher
ISSN:	1521-4095
DOI:	10.1002/adma.202304074