Theoretical Study of Optical and Electrical Properties of Organic Photovoltaic Cell PEDOT: PSS / P3HT: PCBM

Abstract: The mechanism and equivalent circuit model of organic photovoltaic cell were analyzed, and the simulation system of current-voltage (I-V) characteristics of organic photovoltaic cell was established by gpvdm software. Using numerical modeling we show that the increase in efficiency is caused by optical absorption in the pure polymer layer and hence efficient charge separation at the polymer bulk-heterojunction interface between the poly(3,4 ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and poly(3hexylthiophene): phenyl-C61-butyric acid methyl ester (P3HT:PCBM) layer. The effect of internal series resistance and shunt resistance on its I-V characteristics, open circuit voltage and short-circuit current was quantitatively simulated.

Keywords: Organic photovoltaic cells, P3HT, PEDOT, open circuit voltage, short-circuit current