Preparation of nano-crystal N-Zn/TiO_2 anode films and the effects of co-sensitization on the performance of dye-sensitized solar cells

• 来源期刊: 科学通报(英文版)
• 学科: 工学
• 年，卷（期）: 2011,（19）
• 页码范围: 2001-2008
• 页数: 8页
• 分类号: TM914.4
• 语种: 中文

摘要

A nano-crystal N–Zn/TiO 2 anode film was prepared using a combined technology. X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy and cyclic voltammetry characterizations showed that the two elements N and Zn were doped into nano-crystal TiO 2 successfully. This resulted in a strong redshift in the UV-Visible spectrum. UV-Visible measurements showed that the light absorption of N719 and P3OT were complementary and covered the entire visible region. This led to a high utilization of visible light. Solar cells based on the N–Zn/TiO 2 anode film were co-sensitized using P3OT and N719. The cells have a short-circuit current density of 7.91 mA/cm 2 , an open-circuit photovoltage of 0.659 V, and a photoelectric conversion efficiency of 2.64%. Also, the relationship among the N–Zn/TiO 2 -film anode's electric structure, the dye's LUMO, electrochemical impedance, and photoelectric conversion efficiency are discussed in the paper.