Single photon emission from graphene quantum dots at room temperature

Shen Zhao, Julien Lavie, Loïc Rondin, Lucile Orcin-Chaix, Carole Diederichs, Philippe Roussignol, Yannick Chassagneux, Christophe Voisin, Klaus Müllen, Akimitsu Narita, Stéphane Campidelli and Jean-Sébastien Lauret ()
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Shen Zhao: Université Paris-Saclay
Julien Lavie: Université Paris-Saclay
Loïc Rondin: Université Paris-Saclay
Lucile Orcin-Chaix: Université Paris-Saclay
Carole Diederichs: PSL University
Philippe Roussignol: PSL University
Yannick Chassagneux: PSL University
Christophe Voisin: PSL University
Klaus Müllen: Max Planck Institute for Polymer Research
Akimitsu Narita: Max Planck Institute for Polymer Research
Stéphane Campidelli: Université Paris-Saclay
Jean-Sébastien Lauret: Université Paris-Saclay

Nature Communications, 2018, vol. 9, issue 1, 1-5

Abstract: Abstract Graphene being a zero-gap material, considerable efforts have been made to develop semiconductors whose structure is compatible with its hexagonal lattice. Size reduction is a promising way to achieve this objective. The reduction of both dimensions of graphene leads to graphene quantum dots. Here, we report on a single-emitter study that directly addresses the intrinsic emission properties of graphene quantum dots. In particular, we show that they are efficient and stable single-photon emitters at room temperature and that their emission wavelength can be modified through the functionalization of their edges. Finally, the investigation of the intersystem crossing shows that the short triplet lifetime and the low crossing yield are in agreement with the high brightness of these quantum emitters. These results represent a step-forward in performing chemistry engineering for the design of quantum emitters.

Date: 2018
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DOI: 10.1038/s41467-018-05888-w

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