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Open Access Nano Express

Carbon nanotube counter electrode for high-efficient fibrous dye-sensitized solar cells

Shuqing Huang, Huicheng Sun, Xiaoming Huang, Quanxin Zhang, Dongmei Li, Yanhong Luo and Qingbo Meng*

Author affiliations

Key Laboratory for Renewable Energy, Key Laboratory for New Energy Materials and Devices, Institute of Physics (Beijing National Laboratory for Condensed Matter Physics), Chinese Academy of Sciences, Beijing, 100190, China

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Citation and License

Nanoscale Research Letters 2012, 7:222  doi:10.1186/1556-276X-7-222

Published: 17 April 2012

Abstract

High-efficient fibrous dye-sensitized solar cell with carbon nanotube (CNT) thin films as counter electrodes has been reported. The CNT films were fabricated by coating CNT paste or spraying CNT suspension solution on Ti wires. A fluorine tin oxide-coated CNT underlayer was used to improve the adherence of the CNT layer on Ti substrate for sprayed samples. The charge transfer catalytic behavior of fibrous CNT/Ti counter electrodes to the iodide/triiodide redox pair was carefully studied by electrochemical impedance and current-voltage measurement. The catalytic activity can be enhanced by increasing the amount of CNT loading on substrate. Both the efficiencies of fibrous dye-sensitized solar cells using paste coated and sprayed CNT films as counter electrodes are comparative to that using Pt wires, indicating the feasibility of CNT/Ti wires as fibrous counter electrode for superseding Pt wires.

Keywords:
Fibrous dye sensitized solar cells; Counter electrode; Carbon nanotubes; TiO2 nanotube arrays