MoS 2

Molybdenum disulfide https://www.w3.org/1998/Math/MathML" display="inline"> MoS 2 is a two-dimensional (2D) dichalcogenide material that has properties similar to those of graphene. Recently, it has gained significant attention from researchers due to its unique electrical, optical, and mechanical characteristics, leading to applications in solar cells, photodetectors, light-emitting diodes (LEDs), supercapacitors, chemical sensors, mechanical lubricants, etc. The transformation from an indirect to a direct energy bandgap of 1.8 eV in its 2D monolayer form, compared to bulk, makes it a suitable candidate for optoelectronic devices and enables the development of ultrathin devices at the nanoscale. Moreover, owing to its high work function, the https://www.w3.org/1998/Math/MathML" display="inline"> MoS 2 thin layer enables efficient electron flow by aligning energy bands, thereby reducing surface recombination and improving carrier transport in both organic and inorganic solar cells. The chapter begins with an introduction to https://www.w3.org/1998/Math/MathML" display="inline"> MoS 2 material, its basic properties, and its various applications, such as in photovoltaics, chemical sensors, LEDs, and supercapacitors. Subsequently, the properties of https://www.w3.org/1998/Math/MathML" display="inline"> MoS 2 , such as its crystal structure and the origin of its optoelectronic properties, are discussed using the energy band structure. This chapter also reviews and compares various chemical and physical methods employed for the synthesis of 2D- https://www.w3.org/1998/Math/MathML" display="inline"> MoS 2 materials. The photovoltaic applications of https://www.w3.org/1998/Math/MathML" display="inline"> MoS 2 in photodetectors and solar cells are described in detail, addressing the challenges and issues with solar cells and discussing the potential applications of https://www.w3.org/1998/Math/MathML" display="inline"> MoS 2 material to improve the performance of perovskite, copper indium gallium selenide (CIGS), cadmium telluride (CdTe), and organic solar cell devices. Finally, it concludes by presenting insights into the challenges and strategies to overcome these issues and discusses future developments in the field of https://www.w3.org/1998/Math/MathML" display="inline"> MoS 2 materials. This chapter provides a comprehensive overview of https://www.w3.org/1998/Math/MathML" display="inline"> MoS 2 and its potential applications in optoelectronic devices, which will be valuable for researchers developing nanoscale devices.