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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%。
An ethylene glycol solution of NH_4F was used as an electrolyte to prepare a titania nanotube array by anodic oxidation. The length and diameter of the nanotubes were controlled by adjusting the oxidation voltage. The length of the nanotubes was 10 ~ 45μm and the diameter was 50 ~ 150nm of titanium dioxide nanotubes. The effects of the anodic oxidation conditions on the size of TiO 2 nanotubes were investigated. The effects of size of TiO 2 nanotube arrays on the performance of dye-sensitized solar cells (DSCs) were investigated. The results show that with the increase of nanotube length, the surface area increases, the short circuit current of the cell increases significantly, and the photoelectric conversion efficiency also increases. The maximum photoelectric conversion efficiency of DSCs based on TiO 2 nanotube arrays reached 2.27%.