Low pressure sulfurization and characterization of multilayer MoS2 for potential applications in supercapacitors. (15th July 2020)

• Record Type: Journal Article
• Authors: Ghosh, Sampad; Withanage, Sajeevi S.; Chamlagain, Bhim; Khondaker, Saiful I.; Harish, Sivasankaran; Saha, Bidyut Baran
• Is Part Of: Energy. Volume 203(2020)
• Publication Date: 2020-07-15
• Subjects: Molybdenum disulfide -- Sulfurization -- Supercapacitor -- Transition metal dichalcogenides; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2020.117918
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: The emergence of two-dimensional molybdenum disulfide (MoS2 ) has prompted enormous research attention as supercapacitor electrode materials due to their exciting electrochemical, electrical and mechanical properties. In this work, we present a low-pressure technique to grow multilayer MoS2 by sulfurization of molybdenum thin films at three different temperatures (700, 750 and 800 °C) to study the effect of growth temperatures on surface morphology, film thickness and film quality. Large area growth of MoS2 throughout the Si/SiO2 substrate was achieved at all the sulfurization temperature. The as-prepared MoS2 films were characterized by several techniques including X-ray diffraction, atomic force microscopy, scanning electron microscopy, Raman spectroscopy and photoluminescence spectroscopy. Although MoS2 is successfully grown at different temperatures, the surface morphology, thickness and crystallite size have varied significantly with temperature. Our results presented here will contribute towards the reproducible growth of large area MoS2 at the desired temperature for energy storage applications. Graphical abstract: Image 1 Highlights: Multilayer MoS2 is synthesized by sulfurization at different temperatures. This method facilitates large area growth of MoS2 and is highly scalable. Microstructures properties are characterized by several techniques. Morphology, thickness and crystallite size varied significantly with temperature.