Research Abstract


High Electrocatalytic Activity of Vertically Aligned Single-Walled Carbon Nanotubes towards Sulfide Redox Shuttles

2012年4月16日 Scientific Reports 2 : 368 doi: 10.1038/srep00368


Feng Hao1, Pei Dong2, Jing Zhang2, Yongchang Zhang1, Phillip E. Loya2, Robert H. Hauge3, Jianbao Li4, Jun Lou2 & Hong Lin1

  1. 清华大学(中国)
  2. ライス大学 Mechanical Engineering and Materials Science(米国)
  3. ライス大学The Richard E. Smalley Institute for Nanoscale Science and Technology(米国)
  4. 海南大学(中国)
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.