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Influences of Sr-Incorporated TiO2 Layer on the Photovoltaic Properties of Dye-Sensitized Solar Cells
- Influences of Sr-Incorporated TiO2 Layer on the Photovoltaic Properties of Dye-Sensitized Solar Cells
- Kim, Eun Seong; Kim, Dae-Hwan; Lee, Sang-Ju; Han, Yoon Soo
- DGIST Authors
- Kim, Dae-Hwan
- Issue Date
- Journal of Nanoscience and Nanotechnology, 16(3), 2760-2764
- Article Type
- Charge Recombinations; Doping (Additives); Dye-Sensitized Solar Cells (DSCs); Efficiency; Electron Collections; Open Circuit Voltage; Photo-Electrode; Photovoltaic Property; Power Conversion Efficiencies; Short-Circuit Photocurrent; Solar Cells; Solar Power Generation; Solutions; SrCl2; Surface Treatment; TiCl4; Titanium Dioxide
- Effects of a mixed overlayer composed of TiO2 and TiSrO3 on the performance of dye-sensitized solar cells (DSSCs) were investigated. The surface of TiO2 photoelectrode formed on F-doped SnO2 (FTO) was modified by soaking it in a TiCl4:SrCl2 mixed aqueous solution with various molar ratios and then calcining to produce the TiCl4:SrCl2-treated TiO2 photoelectrode (Ti:Sr-TiO2/FTO). The highest power conversion efficiency (PCE) was obtained from DSSC with Ti:Sr(7:3)-TiO2/FTO, which was prepared from the mixed solution with the molar ratio of 7:3 (TiCl4:SrCl2). An enhancement in short-circuit photocurrent (Jsc) and open-circuit voltage (Voc) of DSSC with Ti:Sr(7:3)-TiO2/FTO was achieved, compared to those of the reference device with Ti:Sr(10:0)-TiO2/FTO (i.e., TiO2-coated TiO2/FTO). The incorporation of the mixed overlayer on the nanoporous TiO2 photoelectorde led to an improvement in the electron collection efficiency by a prolonged electron lifetime, thereby increasing the Jsc value. The increase in Voc value of the device with Ti:Sr(7:3)-TiO2/FTO was due to the suppression of the charge recombination between injected electrons and I-3 ions. © 2016 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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