PEDOT:PSS-Doped Graphene Oxide as an Alternative to Hole Transport Material and Transparent Conducting Electrode

In this paper, the fabrication of PEDOT:PSS-doped graphene oxide (GO) as a hole transport conducting electrode has been discussed. GO has been synthesized by modified Hummer’s method. Formation of GO and structural changes in GO after PEDOT:PSS doping had been confirmed by Raman and XRD analyses. FESEM images depict the morphological changes in GO before and after doping. Bonds in the samples have been analyzed by FTIR. UV-Vis study shows that PEDOT:PSS-doped GO has good transparency in the visible region. Hall measurement indicates that the electrical conductivity in GO is due to the electron transport while the conductivity in PEDOT:PSS-doped GO is due to the hole transport. A new type of DSSC has been proposed with the fabricated hole transport PEDOT:PSS electrode without ITO. The working of the cell with the new hole transport electrode has been explained. Prepared electrodes have been used in the fabrication of DSSC, showing exciting initial results.