biostudies-literatureUnknown11(60)Liu QA polypyrrole-cobalt sulfide composite counter electrode (CE) was prepared in this work. Firstly, polypyrrole (PPy) nanorods were prepared by an <i>in situ</i> polymerization method on FTO, then cobalt sulfide (CoS) nanoparticles were coated on PPy nanorods by the electrodeposition method. The DSSC with PPy-CoS CE exhibits superior photoelectric conversion efficiency than that based on platinum (Pt, one of common counter electrodes), which is 7.52%, improving more than 20% compared to Pt CE (6.19%). In addition, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements demonstrated that the PPy-CoS CE exhibited excellent catalytic performance for I₃ ^-/I^- solution.RSC advances38146-38151https://www.ebi.ac.uk/biostudies/studies/S-EPMC9044837biostudies-literatureFacile construction of a polypyrrole-cobalt sulfide counter electrode for low-cost dye-sensitized solar cells.PMC9044837Cheng CLiu QfalseFacile construction of a polypyrrole-cobalt sulfide counter electrode for low-cost dye-sensitized solar cells.A polypyrrole-cobalt sulfide composite counter electrode (CE) was prepared in this work. Firstly, polypyrrole (PPy) nanorods were prepared by an <i>in situ</i> polymerization method on FTO, then cobalt sulfide (CoS) nanoparticles were coated on PPy nanorods by the electrodeposition method. The DSSC with PPy-CoS CE exhibits superior photoelectric conversion efficiency than that based on platinum (Pt, one of common counter electrodes), which is 7.52%, improving more than 20% compared to Pt CE (6.19%). In addition, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) measurements demonstrated that the PPy-CoS CE exhibited excellent catalytic performance for I₃ ^-/I^- solution.2021-01-01T00:00:00Z2021 Nov2025-04-19T09:18:28.122Z2025-04-19T09:18:28.122ZS-EPMC90448373549805910.1039/d1ra06946b