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

Song, Sung Ho; Kim, Bo Hyun; Choe, Duk-Hyun; Kim, Jin; Kim, Dae Chul; Lee, Dong Ju; Kim, Jung Mo; Chang, Kee Joo et al. · Adv Mater · 2015

basic_science · Level V

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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.