DSC光阳极TiO_2纳米管的生长机理及光电性能研究

Formation Mechanism and Photoelectric Performance of TiO_2 Nanotube Arrays Prepared by Anodic Oxidation Method of Dye Sensitized Solar Sell's Anode

本文采用阳极氧化法在不同电解液条件下制备染料敏化太阳能电池光阳极Ti O2纳米管,通过SEM观察纳米管阵列薄膜的形貌,探究Ti O2纳米管的形成机制;采用德国IM6ex电化学工作站,检测其光照开路电位;组装成DSC后,采用Newport太阳模拟器,Keithley2400数字源表测试其I-V曲线。结果表明:分别在0.12%HF、0.24%HF和0.36%HF的三种溶液中制得的Ti O2纳米管管径d0.36>d0.24>d0.12。Ti O2纳米管管径的生成分为三个阶段:阻挡层生成阶段,纳米管形成阶段和纳米管稳定阶段.在0.88wt%NH4F醇水混合溶液种中20V恒压下电解4h得到的Ti O2纳米管薄膜光照开路电位差△Voc=0.074V,组装成DSC得到的Voc=0.66V,Isc=2.1m A,FF=0.38,η=0.53%。

Thin films of TiO2 nanotube arrays for the preparation of dye sensitized solar cells were fabricated by anodic oxidation method in different electrolyte solution. The morphology of the film were observed by scanning electronic microscope （SEM） , and to explain the formation mechanism of TiO2 nanotubes arrays. The illumination open circuit potential were characterized by German IM6ex electrochemical workstation. The I- V curve were characterized by Newport solar simulator, Keithley2400 AVO meter. The results show that TiO2 nano tube diameter was d0. 36 〉 d0.24 〉d0. 12, in0.12% HF, 0.24%HF and 0.36% HF solution. The generation of TiO2 nanotube arrays are divided into three stages： the formation stage of the barrier layer, the formation stage of the nanotubes and the stability of the nanotubes. The TiO2 nanotube film light open circuit potential difference Voc = 0. 074V at 20V in alcohol 0.88wt% NH4F water mixed solution for 4h, assembled into DSC V∝ =0.66V, Isc =2. 1mA, FF =0.38, η =0.53%.