Effect of chlorphyll on P3TAA, PT and PPY thin films for the fabrication of organic solar cells

Abstract

In this project, single layer and double layer organic solar cells were fabricated from multi group organic materials; poly (3-thiophene acetic acid) (P3TAA), polythiophene (PT), polypyrrole (PPY) and chlorophyll (CHLO). Single layer thin films were deposited on indium tin oxide (ITO) coated glass substrate by using electrochemical impedance spectroscopy (EIS) and the second layer, CHLO thin film was deposited on top of conjugated polymers thin film by using spin coater, all at room temperature. Electrical properties and optical properties for both types of organic solar cells were studied and determined by four point probe method, two point probe method, both at dark and under different light intensity, and ultraviolet-visible (UV-Vis) spectroscopy respectively.