Thorough organic/Si nanostructure heterojunction provided by surfactant assisted PEDOT:PSS

In this work, water, isopropyl alcohol (IPA), and Zonyl fluorosurfactant are applied on PEDOT:PSS to try to improve PEDOT:PSS attachment on Si nanowires (SiNWs) thoroughly. After treatment, only Zonyl fluorosurfactant assisted PEDOT:PSS has thorough coating profiles on SiNWs. However, water and IPA diluted PEDOT:PSS only touch the top portion of SiNWs. Therefore, Zonyl-PEDOT:PSS/SiNW solar cells generate highest PCE of 10.87%, J_sc of 28.86 mA/cm², and FF of 71.75%. In comparison, the water-PEDOT:PSS/SiNW and IPA-PEDOT:PSS/SiNW devices have lower PCE of 9.22% and 8.66%, respectively.