Single photon emission from graphene quantum dots at room temperature

Nature Communications
Shen ZhaoJean-Sébastien Lauret

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.

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Citations

Feb 27, 2019·Chemical Communications : Chem Comm·Tobias ScharlDirk M Guldi
Sep 7, 2019·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Shunwei ChenRuiqin Zhang
Dec 4, 2019·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Sven RodtTobias Heindel
Apr 10, 2020·Physical Chemistry Chemical Physics : PCCP·A N StarukhinV G Golubev
Jul 13, 2019·Nature Communications·Xin-Jing ZhaoYuan-Zhi Tan
Nov 30, 2019·Science·Federico LombardiLapo Bogani
Apr 25, 2020·Nanomaterials·Krzysztof TadyszakJacek K Wychowaniec
Sep 26, 2019·Advanced Materials·Yani ChenNedjma Bendiab
May 9, 2021·Photosynthesis Research·Matthew C DrummerKsenija D Glusac
Jul 27, 2021·ACS Nano·Surendra B AnantharamanDeep Jariwala
Dec 10, 2019·Journal of the American Chemical Society·Qiang ChenAkimitsu Narita
Feb 16, 2019·The Journal of Physical Chemistry Letters·Zhiqiang JiMilan Sykora
Aug 14, 2020·The Journal of Physical Chemistry Letters·Subhabrata GhoshAlexey I Chizhik
Oct 5, 2021·Materials Horizons·Giuseppe M PaternòGuglielmo Lanzani

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