Characteristics of Dye-Sensitized Solar Cells with TiO2 Stripes |
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| Authors: | Wen-Feng Lai Pei-Ling Chao Xin-Yu Lin Yin-Pei Chen Jih-Hsin Liu Tz-Feng Lin Wei-Chou Hsu Chia-Yi Huang |
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| Affiliation: | 1.Institute of Microelectronics, National Cheng Kung University, Tainan 701, Taiwan;2.Department of Applied Physics, Tunghai University, Taichung 407, Taiwan; (P.-L.C.); (X.-Y.L.); (Y.-P.C.);3.Department of Electrical Engineering, Tunghai University, Taichung 407, Taiwan;4.Department of Fiber and Composite Materials, Feng Chia University, Taichung 407, Taiwan;5.Academy of Innovative Semiconductor and Sustainable Manufacturing, National Cheng Kung University, Tainan 701, Taiwan |
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| Abstract: | A TiO2 strip array with a thickness of 90 nm was fabricated by photolithography and physical vapor deposition. This work utilized the chemical and physical methods to fabricate the TiO2 strip array. A porous semiconductor layer made of TiO2 nanoparticles was coated on the TiO2 strip array. The TiO2 strip array has a one-dimensional protrusive structure. The energy conversion efficiency (4.38%) of a dye-sensitized solar cell (DSSC) with the TiO2 strip array exceeded that (3.20%) of a DSSC without a TiO2 strip array by 37%. In addition, this result was verified by the electrochemical impedance spectra of the two DSSCs. Therefore, the TiO2 strip array can be used to increase the energy conversion efficiencies of DSSCs. The large energy conversion efficiency of the DSSC with the TiO2 strip array arises from the large surface area of the one-dimensional protrusive structure and its specific electron transport paths. The DSSC with the TiO2 strip array has advantages of economical production cost, easy fabrication, and boosting energy conversion efficiency. |
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| Keywords: | dye-sensitized solar cell TiO2 stripe energy conversion efficiency surface area electron transport path |
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