High Electrocatalytic Activity of Vertically Aligned Single-Walled Carbon Nanotubes towards Sulfide Redox Shuttles.
High Electrocatalytic Activity of Vertically Aligned Single-Walled Carbon Nanotubes towards Sulfide Redox Shuttles.
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DOI：
10.1038/srep00368
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发表时间：
2012
影响因子：
4.6
通讯作者：
Lin, Hong
中科院分区：
文献类型：
--
作者：
Hao, Feng;Dong, Pei;Zhang, Jing;Zhang, Yongchang;Loya, Phillip E.;Hauge, Robert H.;Li, Jianbao;Lou, Jun;Lin, Hong
垂直排列的单壁碳纳米管（VASWCNT）已成功地转移到透明导电氧化物玻璃上并作为高效低成本的无铂对电极应用于硫化物介导的染料敏化太阳能电池（DSC）中，其特征在于相对于常规Pt对电极显著改善的对硫醇盐/二硫化物氧化还原梭的电催化活性。令人印象深刻的是，具有VASWCNTs对电极的器件表现出0.68的高填充因子和高达5.25%的功率转换效率，这显著高于具有常规Pt电极的0.56和3.49%。此外，VASWCNT对电极对通常应用于量子点敏化太阳能电池（QDSC）中的水性多硫化物电解质产生仅21.22 Ω的电荷转移电阻，这比典型的Pt电极低几个数量级。因此，VASWCNT对电极被认为是用于进一步改善其他基于无碘氧化还原对的DSC和基于多硫化物电解质的QDSC的功率转换效率的通用候选物。
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.
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