INFLUENCE OF SUBSTRATE ON PHYSICAL PROPERTIES OF TRANSITION METAL COMPLEXES THIN FILMS

In order to exploit the potential of transition metal complexes in novel optoelectronic devices, it is crucial to gain thorough understanding of their interfacial electronic properties with conducting substrates and establish interconnection between structural and physical properties of transition metal complexes thin films on technologically important substrates. The thesis aims to establish the interconnection between structural and physical properties of tetrapyrrole complexes by underscoring the significance of intermolecular interactions, structural deformations and molecular order, providing useful insights for the creation and control of functional molecular films, crucial for the technological applications of organic semiconductors. A multi-technique characterization approach has been adopted approach based on electronic and absorption spectroscopies and structural diffraction techniques. Inverse photoemission spectroscopy has been utilized to highlight the influence of intermolecular interactions on unoccupied density of states as empty orbitals are more sensitive to the intermolecular interaction due to their higher delocalization around the macrocycle.