Electrical conductivity of chlorophyll with polypyrrole thin film on indium tin oxide as P-N heterojunction solar cell

Abstract

This study was focused on the electrical conductivity for the combination of polypyrrole thin films and chlorophyll thin films by layered on indium tin oxide (ITO) substrate as p­ n hetero-junction solar cell. The polypyrrole thin films was deposited on the ITO substrate by using the Electrochemical Impedance Spectroscopy instrument (EIS) and chlorophyll thin films was deposited on the polypyrrole by using spin coater machine. Chlo+ PPY/ITO thin films were prepared with 15 difference thicknesses and each sample was prepared with 3 duplicates. The current and voltage of the thin films were measured by using four point probes under dark and different light intensity. The result of this work showed the polypyrrole thin film successful layered by chlorophyll on the ITO substrate with different thicknesses. The electrical conductivity under dark was measured by using four point probes. Four point probes with pyronometer and data logger was used to measure the electrical conductivity under different intensity of light. The electrical conductivity under dark was increased with the increasing the polypyrrole thicknesses but decreased with increasing chlorophyll thicknesses. The electrical conductivity under light intensity was increased with increasing the light intensity. The electrical conductivity under light was decreased with increasing CHLO and Polypyrrole thicknesses. As a conclusion, the thinnest PPY thin films with thinnest CHLO thin films are suitable combination to increase the electrical conductivity which is 0.152 Sm· 1.