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Acta Phys. Chim. Sin.  2012, Vol. 28 Issue (03): 578-584    DOI: 10.3866/PKU.WHXB201201032
ELECTROCHEMISTRY AND NEW ENERGY     
Preparation of Single-Crystalline TiO2 Nanowires and Their Application in Flexible Dye-Sensitized Solar Cells
XIAO Yao-Ming, WU Ji-Huai, YUE Gen-Tian, LIN Jian-Ming, HUANG Miao-Liang, FAN Le-Qing, LAN Zhang
Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou 362021, Fujian Province, P. R. China
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Abstract  Single-crystalline TiO2 nanowires (SCTNWs) were prepared using a hydrothermal growth method. The (010) crystal face of the titania particles was eroded by NaOH solution to produce Na2Ti4O9 at high temperature and pressure. H2Ti4O9·H2O was generated after washing with distilled water and HCl, which was then linked to a wire by hydrogen bonding. Finally, sintering gave SCTNWs. The SCTNWs were characterized by transmission electron microscopy (TEM), selected area electron diffraction (SAED), energy-dispersive X-ray spectroscopy (EDS), and X-ray diffraction (XRD). The influence of hydrothermal growth time was investigated. A flexible photoanode was fabricated on Ti foil using a highly stable and uniform titania colloid including the SCTNWs. The photovoltaic performance of dye-sensitized solar cells (DSSCs) containing different contents of SCTNWs was evaluated using scanning electron microscopy (SEM), electrochemical impedance spectroscopy (EIS), ultraviolet-visible (UV-Vis) spectrophotometry, and photovoltaic tests. Under optimized conditions with 7.5% (w) SCTNW, a flexible DSSC with a lightto- electrical energy conversion efficiency of 6.48% was achieved under irradiation with simulated solar light with an intensity of 100 mW·cm-2.

Key wordsFlexible dye-sensitized solar cell      Titania      Nanowire      Hydrothermal method      Flexible photoanode     
Received: 18 October 2011      Published: 03 January 2012
MSC2000:  O644  
  O649  
Fund:  

The project was supported by the National High-Tech Research and Development Program of China (863) (2009AA03Z217) and National Natural Science Foundation of China (90922028, 51002053).

Corresponding Authors: WU Ji-Huai     E-mail: jhwu@hqu.edu.cn
Cite this article:

XIAO Yao-Ming, WU Ji-Huai, YUE Gen-Tian, LIN Jian-Ming, HUANG Miao-Liang, FAN Le-Qing, LAN Zhang. Preparation of Single-Crystalline TiO2 Nanowires and Their Application in Flexible Dye-Sensitized Solar Cells. Acta Phys. Chim. Sin., 2012, 28(03): 578-584.

URL:

http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/10.3866/PKU.WHXB201201032     OR     http://www.whxb.pku.edu.cn/Jwk_wk/wlhx/Y2012/V28/I03/578

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