二氧化钛纳米管阵列制备及其在染料敏化太阳能电池中的应用

Fabrication of Highly-Oriented TiO_2 Nanotube Arrays and Its Application in Dye-Sensitized Solar Cells

以NH_4F的乙二醇溶液为电解液,采用阳极氧化法在钛板上制备二氧化钛纳米管阵列,通过调控氧化电压改变纳米管的长度和管径,得到了长度为10～45μm、管径为50～150nm的二氧化钛纳米管。分析了阳极氧化实验条件对TiO_2纳米管尺寸的影响,并研究了TiO_2纳米管阵列的尺寸对染料敏化太阳能电池(dye-sensitized solar cells,DSCs)性能的影响。结果表明:随着纳米管长度增加,表面积增大,电池的短路电流显著提高,光电转换效率也随之增大。基于TiO_2纳米管阵列的DSCs最高光电转换效率达到了2.27%。

TiO_2 nanotube arrays were fabricated by anodization of titanium foils in an ethylene glycol and NH_4F system.The dimensions of nanotubes were controlled by tailoring anodization voltage.Titania nanotube arrays with various lengths（10-45μm） and pore sizes（50-150 nm） were prepared.The effect of anodization voltage on the microstructural morphology of nanotubes and performance of dye sensitized solar cells（DSCs） based on the TiO_2 nanotube arrays was investigated.The experimental results show that the active surface area increases when the length of nanotubes is longer.The photocurrent and efficiency of DSCs enhanced with increasing anodization voltage,and a promising efficiency of 2.27%for DSCs based on anodized TiO_2 nanotube arrays was achieved.