Light Trapping in Dye Sensitized Solar Cells with Length-Modulated TiO2 Nanotubes
Highly oriented TiO2 nanotube (NT) arrays were fabricated by anodizing Ti foils. The morphology of the NT arrays was characterized by scanning electron microscope. By adjusting the anodization time, the lengths and diameters of TiO2 NT arrays changed from 6.7 to 19.5 μm, and 90 to 110 nm, respectively. As confirmed by X-ray diffraction and Raman spectra, the as-anodized TiO2 NTs were amorphous but transformed into anatase phase after annealing at 450℃ for 3 h. Reflectance spectrum of TiO2 NT arrays showed that NT layer of longer length lowered the reflectance in the visible spectrum because of light trapping effects of NTs, thus enhancing light harvesting of NTs. Dye-sensitized solar cells were fabricated using TiO2 NT arrays with different tube-lengths. Analysis of photocurrent density-voltage (J-V) characteristics showed that higher photoconversion efficiencies were achieved with longer NT lengths.
TiO2 Nanomaterials Solar energy materials Dye-sensitized solar cells
Cheng Shen Ling Shen Jie Yang Jianwei Shi Fei Xu Zhongquan Ma
SHU-SolarE R&D Lab, Department of Physics, Shanghai University, Shanghai 200444, China SHU-SolarE R&D Lab, Department of Physics, Shanghai University, Shanghai 200444, China Solar EnerTec
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
82-86
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）