Application of ZnO Nano-Rod and Nano-Film Bilayer Structure on Flexible Dye-Sensitized Solar Cells
| Autor: | Jun-Hao Fan, 范俊豪 |
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| Rok vydání: | 2013 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 101 In this study, the ZnO working electrode was prepared on ITO/PEN substrates by hydrothermal method and doctor-blade method in dye sensitized solar cell; the ZnO nano-rod was fabricated by hydrothermal method, and the ZnO nano-film was prepared by doctor blade method. The main purpose of the ZnO nano-rod is to collect photogenerated electrons and reduce the charge recombination, while the polydisperse ZnO nano-film is used as a light-scattering layer not only to improve the adsorption of the dye molecules, but also to enhance the absorption of the illumination light. The ZnO (nano rods/nano-film) bilayer structure was used as the working electrode of dye sensitized solar cell. In the SEM analysis, when the nano-film with thickness of 35 μm, the cell efficiency will achieve 2.61% in DSSC. It was found that the the nano-film with thickness of 30 μm, and the the nano-rod with length of 4.5 μm, the best cell efficiency will achieve 3.05% for the ZnO bilayer structure DSSC. In addition, the incident photon-to-current conversion efficiency (IPCE) from 44.6% increases to 53.4%. Electrochemical impedance spectroscopy (EIS) shows that the working electrode with thickness of 35 μm has the smallest RK, so there is the best efficiency for DSSC. In addition, the electrode life time in the bilayer structure electrode is larger than in the nano-film electrode. Thus, ZnO nano-rod and nano-film bilayer structure DSSC have superior electron transport property than ZnO nano-film DSSC. Keywords: ZnO ; nano-rod ; nano-film ; dye-sensitized solar cell |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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