Study of some physical and photovoltaic properties of organic semiconductor thin films

Abstract

Great intense studies have been made in recent years to understand the physical properties of organic semiconductors. They exhibit different properties compared to inorganic semiconductors, and present many advantages such as unlimited potential to be synthesized in new molecular structures, and capability of being processed inexpensively. Among these groups of materials, organic molecules with conjugated 1t electron systems, such as porphyrin molecules, have created a new class of materials that offer the possibility of implementing innovative applications in many modern applications. One of these materials is 5,10,15, 20-tetraphenyl -2JH, 23H- porphine iron (III) chloride (FeTPPCl). The present thesis is devoted to study some structural, optical and electrical transport properties of 5,10,15, 20-tetraphenyl -21H, 23H- porphine iron (III) chloride (FeTPPCI) m bulk and thin film forms.

Thin films of FeTPPCl were prepared by thermal evaporation technique. It was found that FeTPPCl compound in powder form is thermally stable up to 643 K and has a tetragonal structure with lattice constants of a= 13.53 A and c= 9.82 A and with space group (14/m, Z=2), while, the X-ray diffraction of the as-deposited and annealed films have amorphous structure.