Abstract:
This thesis presents a comprehensive investigation into the synthesis and fabrication
of heterostructures comprising transition metal dichalcogenides (TMDs) and lead
halide perovskite materials. The research focuses on exploring the growth mechanism,
material properties and the potential applications of heterostructures of these materials
in the field of optoelectronics.
The study begins with a thorough examination of the synthesis routes for TMDs and
perovskites, aiming to develop novel methods that enable the controlled growth of
these materials with good optical and electrical properties. Special emphasis is placed
on the synthesis of monolayer TMDs, leveraging growth promoters and optimizing
chemical vapor deposition parameters to achieve improved control and
reproducibility. Additionally, novel solvothermal methods are invented to grow lead
halide perovskites with ultra-low dark currents. The thesis also discusses a technique
to perform photolithography on water-soluble materials, enabling the fabrication of
electrical devices out of water-soluble CsPbBr 3 .
The final phase of the research focuses on the realization of heterostructures by
combining TMDs and perovskites. A Transfer technique was developed for the
successful transfer of 2D as well as perovskite materials. By employing this technique,
we successfully fabricated photodiodes and LEDs out of the TMD perovskite
heterostructures.
Overall, this thesis provides a comprehensive understanding of the synthesis and
fabrication of heterostructures involving TMDs and perovskites. The results obtained
demonstrate the potential for these heterostructures in optoelectronic applications,
including photodetectors, light-emitting diodes, and sensors. The research contributes
to the ongoing efforts in developing advanced materials and devices for the next
generation of optoelectronic technologies.
