STUDY OF TWO DIMENSIONAL MOLYBDENUM DISULFIDE BASED HYBRID HETEROSTRUCTURES FOR PHOTOVOLTAIC APPLICATIONS

Abstract

Developing novel heterostructures with high performance is essential to obtain efficient photovoltaic devices. The excellent properties of nano-materials based heterostructures provide unique opportunities to achieve highly efficient and ultrafast photovoltaic devices. The extraordinary properties of two-dimensional (2D) materials, such as the highest specific surface area, excellent mechanical flexibility, and better electronic and optoelectronic properties, can offer extensive opportunities in futuristic electronic devices. Nanostructured 2D materials are becoming a prominent asset in developing novel heterostructures for next-generation optoelectronic applications, including solar cell and photodetection applications. In recent years, enormous research has been done to design and develop photovoltaic devices based on nanostructure materials, to fulfill the energy requirement for current and next-generation. In this regard, molybdenum disulfide has recently received much attention from researchers as an excellent choice for photovoltaic applications due to its remarkable electrical, optical, mechanical, and optoelectronic properties along with excellent mechanical flexibility. Moreover, the absence of floating bonds on the surface of MoS2 thin film leads to minimum lattice mismatch, which supports better integration with hybrid dimensional inorganic semiconductors. In the current scenario, MoS2-based hybrid heterostructures have gotten enormous attention due to their unique physio-chemical properties. These properties make it an encouraging and promising candidate for versatile application purposes. In the current thesis work, various hybrid heterostructures have been fabricated by the combination of MoS2 with fluorescent quantum dots, oxide semiconductors, and insulating layers in some peculiar configurations. The fabricated heterostructures deliver promising pathways for the futuristic efficient solar cell and ultrafast and broad-range photodetection applications. The main objective of the present dissertation is to synthesize the various MoS2-based hybrid heterostructures having great potential in solar cell and photodetection applications.