Exploring Intra and Inter-Molecular Engineering of Thiophene-Based Derivative for the Development of Advanced Organic Semiconductors

(da caricare successivamente)

In recent decades, organic semiconductors have emerged as a promising alternative to traditional inorganic counterparts, largely due to their flexible design capabilities and the incorporation of functional side chains. These advancements have led to the commercialization of various technologies, although challenges remain in optimizing the efficiency of optoelectronic devices and harnessing the inherent advantages of organic materials, particularly in cost and processing. Within this context, this thesis explores molecular functionalization suitable for advanced photoresponsive organic semiconductors inclusive of light-driven molecular actuators. To this end, two lines of work were conducted: intramolecular engineering of the light-responsive azobenzene and the development of methods to enhance intramolecular interactions among πconjugated molecules. The first part of this thesis investigates the impact of meta-functionalization on azobenzene, incorporating electron-donating and electron-withdrawing groups. These modifications significantly influence the electronic properties and light-responsive behavior of the azobenzene systems. The second part focuses on the use of solid additives to manipulate molecular organization through hydrogen bonding and thiocarbonyl-molecular iodine adduct formation. Adjusting these intermolecular interactions enables fine-tuning of the physical and optoelectronic properties of organic semiconductors. The outcomes of this research provide a deeper understanding of the molecular mechanisms governing the behavior of light-responsive organic semiconductors. These findings pave the way for the design and development of novel organic semiconductor materials with enhanced functionality and efficiency. This work not only contributes to the theoretical framework of organic semiconductor research but also offers practical solutions for advancing the field of optoelectronics