Probing the nanoscale light emission properties of a CVD-grown MoS2 monolayer by tip-enhanced photoluminescence
作者： Yoshito Okuno , Ophélie Lancry , Agnès Tempez , Cristina Cairone , Matteo Bosi
DOI: 10.1039/C8NR02421A
关键词: Optoelectronics 、 Monolayer 、 Chemical vapor deposition 、 Molybdenum disulfide 、 Materials science 、 Microscopy 、 Light emission 、 Visible spectrum 、 Spectroscopy 、 Photoluminescence
摘要: Two-dimensional transition metal dichalcogenides are gaining increasing interest due to their promising optical properties. In particular, molybdenum disulfide (MoS2) which displays a band-gap change from indirect at 1.29 eV for bulk materials direct 1.8 the material monolayer. This particular effect can lead strong light interaction pave way new approach next generation of visible emitting devices. this work we show nanoscale variation emission properties by tip-enhanced photoluminescence microscopy and spectroscopy in MoS2 monolayer, grown chemical vapour deposition. The variations different effects depending on shape single layer, instance, concentration point defect an irregularly shaped flake presence terrace triangular Simultaneously, atomic force reveals indeed nanometric terrace, composed additional layer MoS2, PL intensity imaging shows localized decrease.
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