Bandgap Widening of Phase Quilted, 2D MoS2 by Oxidative Intercalation

Sung Ho Song; Bo Hyun Kim; Duk-Hyun Choe; Jin Kim; Dae Chul Kim; Dong Ju Lee; Jung Mo Kim; Kee Joo Chang; Seokwoo Jeon

doi:10.1002/adma.201500649

Bandgap Widening of Phase Quilted, 2D MoS2 by Oxidative Intercalation

Adv Mater. 2015 May 27;27(20):3152-8. doi: 10.1002/adma.201500649. Epub 2015 Apr 13.

Authors

Sung Ho Song¹, Bo Hyun Kim¹, Duk-Hyun Choe², Jin Kim¹, Dae Chul Kim¹, Dong Ju Lee¹, Jung Mo Kim¹, Kee Joo Chang², Seokwoo Jeon¹

Affiliations

¹ Department of Materials Science and Engineering, Graphene Research Center of KI for the Nano Century, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea.
² Department of Physics, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea.

PMID: 25867545
DOI: 10.1002/adma.201500649

Abstract

Controllable bandgap widening from 1.8 to 2.6 eV is reported from oxidized MoS2 sheets that are composed of quilted phases of various MoSxOy flakes. The exfoliated flakes have large size (≥100 μm × 100 μm) sheets with average thickness of 1.7 nm. Remarkably, fine reversible tuning of the bandgap is achieved by postprocessing sulfurization of the MoSxOy sheets.

Keywords: 2D transition metal dichalcogenides; bandgap widening; intercalation compounds; molybdenum disulfide; photoluminescence.