Structure and photovoltaic properties of ZnO nanowire for dye-sensitized solar cells |
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Authors: | Kao Ming-Cheng Chen Hone-Zern Young San-Lin Lin Chen-Cheng Kung Chung-Yuan |
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Affiliation: | Department of Electronic Engineering, Hsiuping University of Science and Technology, Taichung, 412, Taiwan. kmc@mail.hust.edu.tw. |
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Abstract: | Aligned ZnO nanowires with different lengths (1 to approximately 4 μm) have been deposited on indium titanium oxide-coated glass substrates by using the solution phase deposition method for application as a work electrode in dye-sensitized solar cells (DSSC). From the results, the increases in length of zinc oxide (ZnO) nanowires can increase adsorption of the N3 dye through ZnO nanowires to improve the short-circuit photocurrent (Jsc) and open-circuit voltage (Voc), respectively. However, the Jsc and Voc values of DSSC with ZnO nanowires length of 4.0 μm (4.8 mA/cm2 and 0.58 V) are smaller than those of DSSC with ZnO nanowires length of 3.0 μm (5.6 mA/cm2 and 0.62 V). It could be due to the increased length of ZnO nanowires also resulted in a decrease in the transmittance of ZnO nanowires thus reducing the incident light intensity on the N3 dye. Optimum power conversion efficiency (η) of 1.49% was obtained in a DSSC with the ZnO nanowires length of 3 μm. |
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Keywords: | ZnO Nanowires DSSC Open-circuit voltage |
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