Applications of vertically oriented TiO2 micro-pillars array on the electrode of dye-sensitized solar cell |
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Authors: | TH Meen CJ Huang JK Tsai WR Chen LW Ji |
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Institution: | a Department of Electronic Engineering, National Formosa University, Hu-Wei, Yunlin 632, Taiwan, ROC b Department of Applied Physics, National University of Kaohsiung, Nan-Tzu, Kaohsiung 811, Taiwan, ROC c Department of Electrical Engineering, Hsiuping Institute of Technology, Dali City, Taichung 412, Taiwan, ROC d Electro-Optical and Materials Science, National Formosa University, Hu-Wei, Yunlin 632, Taiwan, ROC |
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Abstract: | In this research, dye-sensitized solar cells based on TiO2 micro-pillars fabricated by inductive couple plasma etcher were investigated by analyses of X-ray diffraction (XRD), scanning electron microscopy (SEM), contact angle, ultraviolet-visible absorption spectra (UV-vis), and current-voltage characteristics. X-ray diffraction patterns show that the TiO2 anatase phase forms while sintering at 450 °C for 30 min. The SEM images reveal that the diameter and height of TiO2 micro-pillars are about 3 and 0.8 μm, respectively. The measurements of contact angle between TiO2 micro-pillars and deionized water (DI water) reveal that the TiO2 micro-pillars is super-hydrophilic while annealed at 450 °C for 30 min.The absorption spectrum of TiO2 micro-pillars is better than TiO2 thin film and can be widely improved in visible region with N3 dye adsorbed. The results of current-voltage (I-V) characteristics analysis reveal that dye-sensitized solar cell with TiO2 micro-pillars electrode has better I-V characteristics and efficiency than TiO2 film electrodes. This result may be due to the annealed TiO2 micro-pillars applied on the electrode of dye-sensitized solar cell can increase the contact area between TiO2 and dye, resulting in the enhancement of I-V characteristics and efficiency for dye-sensitized solar cell. |
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Keywords: | A Microporous materials B Plasma deposition D Optical properties |
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