Xie Z B, Adams S, Blackwood D J, Wang J
Department of Materials Science and Engineering, National University of Singapore, Singapore 117574, Singapore.
Nanotechnology. 2008 Oct 8;19(40):405701. doi: 10.1088/0957-4484/19/40/405701. Epub 2008 Aug 21.
Ordered, closely packed, and vertically oriented titania nanotube arrays with lengths exceeding 10 µm were fabricated by anodization of titanium foils. The effects of anodization voltage and time on the microstructural morphology and the photovoltaic performance of dye sensitized solar cells based on the titania nanotube arrays were investigated. On increasing the anodization voltage or time, the increase in active surface area leads to enhanced photovoltaic currents and thereby an overall higher performance of the dye sensitized solar cells. The efficiency enhancement with rising anodization voltage exceeds the increase in the outer surface area of the nanotubes, indicating that the active surface area is further enlarged by a more accessible inner surface of the nanotube arrays grown with a higher anodization voltage. A promising efficiency of 3.67% for dye sensitized solar cells based on anodized titania nanotube arrays was achieved under AM1.5, 100 mW cm(-2) illumination.
通过对钛箔进行阳极氧化，制备出了有序、紧密排列且垂直取向、长度超过10微米的二氧化钛纳米管阵列。研究了阳极氧化电压和时间对基于二氧化钛纳米管阵列的染料敏化太阳能电池微观结构形态和光伏性能的影响。随着阳极氧化电压或时间的增加，活性表面积的增加导致光伏电流增强，从而使染料敏化太阳能电池的整体性能更高。随着阳极氧化电压升高效率的提高超过了纳米管外表面面积的增加，这表明通过在更高阳极氧化电压下生长的纳米管阵列更易接近的内表面，活性表面积进一步增大。在AM1.5、100毫瓦每平方厘米光照条件下，基于阳极氧化二氧化钛纳米管阵列的染料敏化太阳能电池实现了3.67%的可观效率。
