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Extensive study of optical contrast between bulk and nanoscale transition metal dichalcogenide semiconductors

Journal of Semiconductors 2021年第8期42卷 45-54页

作者： Ankush Parmar jashangeet kaur Manish Dev Sharma Navdeep Goyal Centre of Applied Sciences Department of PhysicsSector-14Panjab UniversityChandigarh 160014India Department of Physics G.G.D.S.D CollegeSector-32Chandigarh 160030India

A remarkable refinement in the optical behavior of two-dimensional transition metal dichalcogenides(TMDs)has been brought to light when cleaved from their respective *** atomically thin direct bandgap semiconductors are highly responsive to optical energy which proposes the route for futuristic photonic *** this manuscript,we have substantially focused on the optical study of MoS_(2)and WS_(2)nanosheets and comparative analysis with their bulk *** synthesis of nanosheets has been accomplished with liquid exfoliation followed by fabrication of thin films with drop-casting technique.X-ray diffraction and field emission scanning electron microscopy affirmed the morphology,whereas,UV-visible spectroscopy served as the primary tool for optical *** was observed that several parameters,like optical conductivity,optical band-gap energy *** enhanced statistics in the case of exfoliated nanosheets as compared to their respective *** researchers have touched upon this analysis for MoS_(2),but it is completely novel for WS_(2).We expect our work to clearly distinguish between the optical behaviors of nanoscale and bulk TMDs so as to intensify and strengthen the research related to 2D-layered materials for optoelectronic and photovoltaic applications.

关键词： transition metal dichalcogenides 2D layered materials optical properties liquid phase exfoliation thin films dropcasting

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