Citation: 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[J]. Acta Physico-Chimica Sinica, ;2012, 28(03): 578-584. doi: 10.3866/PKU.WHXB201201032 shu

Preparation of Single-Crystalline TiO₂ Nanowires and Their Application in Flexible Dye-Sensitized Solar Cells

1.
Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou 362021, Fujian Province, P. R. China

Received Date: 18 October 2011
Available Online: 3 January 2012

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.
- Flexible dye-sensitized solar cell,
- Titania,
- Nanowire,
- Hydrothermal method,
- Flexible photoanode
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Preparation of Single-Crystalline TiO₂ Nanowires and Their Application in Flexible Dye-Sensitized Solar Cells