Vertically aligned single-walled carbon nanotubes (VASWCNTs) have been successfully transferred ontotransparent conducting oxide glass and implemented as efficient low-cost, platinum-free counter electrodein sulfide –mediated dye-sensitized solar cells (DSCs), featuring notably improved electrocatalytic activitytoward thiolate/disulfide redox shuttle over conventional Pt counter electrodes. Impressively, device withVASWCNTs counter electrode demonstrates a high fill factor of 0.68 and power conversion efficiency up to5.25％, which is significantly higher than 0.56 and 3.49％ for that with a conventional Pt electrode. Moreover,VASWCNTs counter electrode produces a charge transfer resistance of only 21.22 V towards aqueouspolysulfide electrolyte commonly applied in quantum dots-sensitized solar cells (QDSCs), which is severalorders of magnitude lower than that of a typical Pt electrode. Therefore, VASWCNTs counter electrodes arebelieved to be a versatile candidate for further improvement of the power conversion efficiency of otheriodine-free redox couple based DSCs and polysulfide electrolyte based QDSCs.