单晶二氧化钛纳米线的制备及其在柔性染料敏化太阳能电池中的应用

doi:10.3866/PKU.WHXB201201032

Abstract

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 words: Flexible dye-sensitized solar cell, Titania, Nanowire, Hydrothermal method, Flexible photoanode

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 Phys. -Chim. Sin. 2012, 28(03), 578-584. doi: 10.3866/PKU.WHXB201201032

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

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