Graphene Quantum Dots Doping of MoS2 Monolayers

Ziwei Li; Ruquan Ye; Rui Feng; Yimin Kang; Xing Zhu; James M Tour; Zheyu Fang

doi:10.1002/adma.201501888

Graphene Quantum Dots Doping of MoS2 Monolayers

Adv Mater. 2015 Sep 16;27(35):5235-40. doi: 10.1002/adma.201501888. Epub 2015 Aug 10.

Authors

Ziwei Li¹, Ruquan Ye², Rui Feng¹, Yimin Kang¹, Xing Zhu¹, James M Tour², Zheyu Fang^{1

3}

Affiliations

¹ State Key Lab for Mesoscopic Physics, School of Physics, Academy for Advanced Interdisciplinary Studies, Peking University, Beijing, 100871, China.
² Department of Chemistry, Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, 6100 Main Street, Houston, TX, 77005, USA.
³ Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.

PMID: 26255655
DOI: 10.1002/adma.201501888

Abstract

Graphene quantum dots (GQDs) interacting with molybdenum disulfide (MoS2 ) monolayers induce an effective photoexcited charge transfer at the interface. Both the photoluminescence (PL) and valley polarization of this GQDs/MoS2 heterostructure can be modulated under various doping charge densities. The photon-exciton interaction is used to explain and calculate the heterostructure PL control, and is further applied to the valley-polarization tuning.

Keywords: MoS2; charge transfer; doping; graphene quantum dots; heterostructures; photoluminescence.