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Increased Photovoltaic Performance by the Optimized TiCl4 and AlCl3 Surface Treatment in Dye-Sensitized Solar Cells
- Increased Photovoltaic Performance by the Optimized TiCl4 and AlCl3 Surface Treatment in Dye-Sensitized Solar Cells
- Oh, JH[Oh, Ju Hee]; Kim, DH[Kim, Dae-Hwan]; Lee, SJ[Lee, Sang-Ju]; Kwak, G[Kwak, Giseop]; Han, YS[Han, Yoon Soo]
- DGIST Authors
- Oh, JH[Oh, Ju Hee]; Kim, DH[Kim, Dae-Hwan]; Lee, SJ[Lee, Sang-Ju]
- Issue Date
- Journal of Nanoscience and Nanotechnology, 14(12), 9247-9252
- Article Type
- AlCl3; Aluminum; Aluminum Coatings; Doping (Additives); Dye-Sensitized Solar Cells (DSCs); Electrochemical Impedance; Open Circuit Voltage; Open Circuit Voltage Decays; Photo-Electrode; Photovoltaic Performance; Power Conversion Efficiencies; Short-Circuit Photocurrent; Solar Cells; Surface Treatment; TiCl4; Titanium Dioxide
- The surface of TiO2 photoelectrodes coated on F-doped SnO2 (FTO) was modified by soaking it in a TiCl4:AlCl3 mixed aqueous solution with various molar ratios, and then calcining to produce the TiCl4:AlCl3-treated TiO2 photoelectrode (Ti:Al-TiO2/FTO). The highest power conversion efficiency (PCE) was obtained from dye-sensitized solar cells (DSSC) with Ti:Al(5:5)-TiO2/FTO, which was prepared from the mixed solution with the molar ratio of 5:5 (TiCl4:AlCl3). PCE of DSSC with Ti:Al (5:5)-TiO2/FTO was improved by ca. 19.6%, compared to that of the reference device with Ti:Al (10:0)-TiO2/FTO (i.e., TiO2-coated TiO2/FTO) due to an enhancement in both short-circuit photocurrent (Jsc) and open-circuit voltage (Voc). A series of measurements such as UV-visible absorption, electrochemical impedance, open circuit voltage decay and dark current revealed that the increase in Jsc was attributed to the improvement of electron collection efficiency by a prolonged electron lifetime, and the suppression of the charge recombination between injected electrons and I-3 ions was found to increase the Voc value of the device with Ti:Al(5:5)-TiO2/FTO. Copyright © 2014 American Scientific Publishers All rights reserved.
- American Scientific Publishers
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- Convergence Research Center for Solar Energy1. Journal Articles
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