Investigation Solvent type on Improvement (3, 4 ethylene dioxythiophene): (poly styrene sulfonate) Polymeric Membrane as Hole Transport Layer for Polymer Solar Cell
Paper ID : 1322-MST2015-FULL
sahar mahmodi *1, leila naji2, sholeh kazemifard2, zahra teymuri2
1qom,bajak street, farhangian2,mehr alley, mehr2,pelaque 13,second floor
2amirkabir university of technology
Membrane separation has immerged as a new technology in science with widely applications. One of the main and novel applications of membrane technology is power conversion systems. In this research, using of Hole Transporting Layer has been considered. The compound which used is (3, 4 ethylene dioxythiophene): (poly styrene sulfonate) = PEDOT: PSS as hole transporting layer that deposited on Indium Tin Oxide (ITO) as anode. The main role of hole transporting layer is blocking electron movement to anode electrode and in collecting and extracting positive carriers from active layer interface. The main defect of PEDOT: PSS film is its conductivity that shows value below 1SCm -1 which is lower than metal electrode. PSS (Polystyrene sulfonate) used as the counter anion for the PEDOT for charge balance and stabilizing PEDOT in solvent. The PEDOT chain attracts the PSS chain due to the columbic attraction. Main goal of this manuscript is improvement optical and electrical properties of PEDOT: PSS film with solvent treatment method and annealing process for this purpose. Polar solvents (ETOH, MeOH) or solvents with high dielectric constant (such as DMSO) have been used in this research. With using this method the conductivity of PEDOT: PSS film improved 150 times in comparison with the films without treatment. Fourier transforms infrared spectroscopy (FT-IR), Ultraviolet-Visible spectroscopy (UV-Vis), scanning electron microscopy (SEM), and measuring electrical resistance was carried out on different prepared films. Annealing effect has been considered too in temperature range from 80 to 280°C. According to the results, the most conductivity value has been reached in 15% DMSO mixture with water, and in 170°C the smoothest morphology has been gained.
Polymeric membrane, hole transport, improvement, polar solvent, annealing temperature
Status : Paper Accepted (Poster Presentation)