ELECTRICAL PROPERTIES, THICKNESS MEASUREMENT AND EFFICIENCY OF BILAYER ORGANIC SOLAR CELL USING GARCINIA MANGOSTANA LINN AND ALLAMANDA CATHARTICA LINN AS NATURAL DYE: A SUBSTRATE TREATMENT

Abstract

This paper describes the electrical conductivity, Hall effect study, thickness measurement and efficiency in bilayer hetero-junction organic solar cell (OSCs) using natural pigments from Mangosteen Pericarp (Garcinia mangostana Linn) and Yellow Bell (Allamanda cathartica Linn) Flower. In this work, Indium Tin oxide (ITO) glass as substrate was heated at 50˚C to 200˚C. The polymer used was Poly (3-Dodecylthiophene) (P3DT) thin film. The P3DT were deposited on the ITO substrate using electrochemistry method and spin coated technique at room temperature. The electrical conductivity of ITO deposited thin film was explored by four point probes (FPP) under dark and under light radiation (range of 10 Wm-2 to 200Wm-2). FPP data revealed that electrical conductivity was increased by the increment of light intensity and temperature of substrate. Then, the samples were examined using Hall Effect measurement to obtain the type of sample, Hall mobility, and highest charge carrier in the sample of OSCs. Both samples detected was N-type from Hall effect measurement. The efficiency detected in range of 0.013% to 0.211%.