title: High Electrocatalytic Activity of Vertically Aligned Single-Walled Carbon Nanotubes towards Sulfide Redox Shuttles.
abstract: Vertically aligned single-walled carbon nanotubes (VASWCNTs) have been successfully transferred onto transparent conducting oxide glass and implemented as efficient low-cost, platinum-free counter electrode in sulfide -mediated dye-sensitized solar cells (DSCs), featuring notably improved electrocatalytic activity toward thiolate/disulfide redox shuttle over conventional Pt counter electrodes. Impressively, device with VASWCNTs counter electrode demonstrates a high fill factor of 0.68 and power conversion efficiency up to 5.25%, 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 Ω towards aqueous polysulfide electrolyte commonly applied in quantum dots-sensitized solar cells (QDSCs), which is several orders of magnitude lower than that of a typical Pt electrode. Therefore, VASWCNTs counter electrodes are believed to be a versatile candidate for further improvement of the power conversion efficiency of other iodine-free redox couple based DSCs and polysulfide electrolyte based QDSCs.
authors.forename: Feng
authors.initials: F
authors.lastname: Hao
authors.forename: Pei
authors.initials: P
authors.lastname: Dong
authors.forename: Jing
authors.initials: J
authors.lastname: Zhang
authors.forename: Yongchang
authors.initials: Y
authors.lastname: Zhang
authors.forename: Phillip E
authors.initials: PE
authors.lastname: Loya
authors.forename: Robert H
authors.initials: RH
authors.lastname: Hauge
authors.forename: Jianbao
authors.initials: J
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Lou
authors.forename: Hong
authors.initials: H
authors.lastname: Lin