High Electrocatalytic Activity of VerticallyAligned Single-Walled CarbonNanotubes towards Sulfide RedoxShuttles
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.
Feng Hao Pei Dong Jing Zhang Yongchang Zhang Phillip E. Loya Robert H. Hauge Jianbao Li Jun Lou Hong Lin
State Key Laboratory of New Ceramics & Fine Processing, Department of Material Science and Engineeri Mechanical Engineering and Materials Science, Rice University, 6100 Main St, Houston, Texas77005, US The Richard E. Smalley Institute for Nanoscale Science and Technology, Rice University, 6100 Main St College of Materials Science and Chemical Engineering, Hainan University, Haikou 570228, P. R. China
国内会议
北京
英文
1-6
2012-09-05（万方平台首次上网日期，不代表论文的发表时间）