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Open Access Highly Accessed Nano Express

A cylindrical core-shell-like TiO2 nanotube array anode for flexible fiber-type dye-sensitized solar cells

Jiefeng Yu, Dan Wang, Yining Huang, Xing Fan, Xin Tang, Cong Gao, Jianlong Li, Dechun Zou* and Kai Wu*

Author Affiliations

BNLMS, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, China

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Nanoscale Research Letters 2011, 6:94  doi:10.1186/1556-276X-6-94

Published: 18 January 2011

Abstract

A versatile anodization method was reported to anodize Ti wires into cylindrical core-shell-like and thermally crystallized TiO2 nanotube (TNT) arrays that can be directly used as the photoanodes for semi- and all-solid fiber-type dye-sensitized solar cells (F-DSSC). Both F-DSSCs showed higher power conversion efficiencies than or competitive to those of previously reported counterparts fabricated by depositing TiO2 particles onto flexible substrates. The substantial enhancement is presumably attributed to the reduction of grain boundaries and defects in the prepared TNT anodes, which may suppress the recombination of the generated electrons and holes, and accordingly lead to more efficient carrier-transfer channels.