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Transition metal dichalcogenides, such as molybdenum disulfide (MoS 2 ), show peculiar chemical/physical properties that enable their use in applications ranging from micro- and nano-optoelectronics to surface catalysis, gas and light detection, and energy harvesting/production. One main limitation to fully harness the potential of MoS 2 is given by the lack of scalable and low environmental impact synthesis of MoS 2 films with high uniformity, hence setting a significant challenge for industrial applications. In this work, we develop a versatile and scalable sol-gel-derived MoS 2 film fabrication by spin coating deposition of an aqueous sol on different technologically relevant, flexible substrates with annealing at low temperatures (300 °C) and without the need of sulfurization and/or supply of hydrogen as compared to cutting-edge techniques. The electronic and physical properties of the MoS 2 hin films were extensively investigated by means of surface spectroscopy and structural characterization techniques. Spatially homogenous nanocrystalline 2H-MoS 2 hin films were obtained exhibiting high chemical purity and excellent electronic properties such as an energy band gap of 1.35 eV in agreement with the 2H phase of the MoS 2 , and a density of states that corresponds to the n-type character expected for high-quality 2H-MoS 2 . The potential use of sol-gel-grown MoS 2 as the candidate material for electronic applications was tested via electrical characterization and demonstrated via the reversible switching in resistivity typical for memristors with a measured ON-OFF ratio ≥10 2 . The obtained results highlight that the novel low-cost fabrication method has a great potential to promote the use of high-quality MoS 2 in technological and industrial-relevant scalable applications.

Versatile and Scalable Strategy To Grow Sol–Gel Derived 2H-MoS2 Thin Films with Superior Electronic Properties: A Memristive Case

Versatile and Scalable Strategy To Grow Sol–Gel Derived 2H-MoS₂ Thin Films with Superior Electronic Properties: A Memristive Case