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Influences of Sr-Incorporated TiO2 Layer on the Photovoltaic Properties of Dye-Sensitized Solar Cells

Title
Influences of Sr-Incorporated TiO2 Layer on the Photovoltaic Properties of Dye-Sensitized Solar Cells
Authors
Kim, Eun SeongKim, Dae-HwanLee, Sang-JuHan, Yoon Soo
DGIST Authors
Kim, Dae-Hwan
Issue Date
2016-03
Citation
Journal of Nanoscience and Nanotechnology, 16(3), 2760-2764
Type
Article
Article Type
Article
Keywords
Charge RecombinationsDoping (Additives)Dye-Sensitized Solar Cells (DSCs)EfficiencyElectron CollectionsOpen Circuit VoltagePhoto-ElectrodePhotovoltaic PropertyPower Conversion EfficienciesShort-Circuit PhotocurrentSolar CellsSolar Power GenerationSolutionsSrCl2Surface TreatmentTiCl4Titanium Dioxide
ISSN
1533-4880
Abstract
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.
URI
http://hdl.handle.net/20.500.11750/5116
DOI
10.1166/jnn.2016.11060
Publisher
American Scientific Publishers
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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