Study of some physical properties of organic dye thin films and photovoltaic application

Abstract

This thesis represents an experimental study for physical properties of organic dye. This thesis consists of five chapters, conclusion and list of references. The thesis begins with a short theoretical background about the field of organic semiconductors, Electronic structure of organic semiconductors, Absorption process and finally the theory of organic photovoltaic solar cell. Then it represented a brief overview of the experimental techniques used in this thesis. It describes the basic of the conventional thermal evaporation (vacuum deposition) techniques, the configuration of the sample preparation, the film thickness measurement methods , the techniques that used to determine the molecular structure, i.e. X-ray diffraction pattern (XRD), Scanning electron microscope and Fourier transform infrared spectroscopy (FT-IR) Techniques, the techniques that used to determine the optical properties usually the Spectrophotometric measurement of transmittance (T) and reflectance (R) at normal incidence light, the cyclic voltammetry technique, the technique used to determine the value of the HOMO-LUMO gap, current-voltage (I-V) measurement and capacitance-voltage (C-V) measurement.