Origin of Improved Optical Quality of Monolayer Molybdenum Disulfide Grown on Hexagonal Boron Nitride Substrate

Yi Wan; Hui Zhang; Wei Wang; Bowen Sheng; Kun Zhang; Yilun Wang; Qingjun Song; Nannan Mao; Yanping Li; Xinqiang Wang; Jin Zhang; Lun Dai

doi:10.1002/smll.201502141

Origin of Improved Optical Quality of Monolayer Molybdenum Disulfide Grown on Hexagonal Boron Nitride Substrate

Small. 2016 Jan 13;12(2):198-203. doi: 10.1002/smll.201502141. Epub 2015 Nov 25.

Authors

Yi Wan^{1

2}, Hui Zhang¹, Wei Wang¹, Bowen Sheng^{1

2}, Kun Zhang¹, Yilun Wang¹, Qingjun Song¹, Nannan Mao³, Yanping Li¹, Xinqiang Wang^{1

2}, Jin Zhang³, Lun Dai^{1

2}

Affiliations

¹ State Key Lab for Mesoscopic Physics and School of Physics, Peking University, Beijing, 100871, P. R. China.
² Collaborative Innovation Center of Quantum Matter, Beijing, 100871, P. R. China.
³ Center for Nanochemistry, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing, 100871, P. R. China.

PMID: 26603599
DOI: 10.1002/smll.201502141

Abstract

Monolayer MoS2 is synthesized on hexagonal boron nitride (h-BN) flakes with a simple, high-yield method. Monolayer MoS2 on h-BN exhibits improved optical quality. Combining the theoretical and experimental analysis, it is concluded that the enhanced photoluminescence and Raman intensities of monolayer MoS2 probably originate from the relatively weak doping effect from the h-BN substrate rather than the optical interference effect.

Keywords: doping effects; hexagonal boron nitride substrates; monolayer molybdenum disulfide; photoluminescence; raman spectra.

Publication types

Research Support, Non-U.S. Gov't