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Increased Photovoltaic Performance by the Optimized TiCl4 and AlCl3 Surface Treatment in Dye-Sensitized Solar Cells

Title
Increased Photovoltaic Performance by the Optimized TiCl4 and AlCl3 Surface Treatment in Dye-Sensitized Solar Cells
Authors
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
2014-12
Citation
Journal of Nanoscience and Nanotechnology, 14(12), 9247-9252
Type
Article
Article Type
Article
Keywords
AlCl3AluminumAluminum CoatingsDoping (Additives)Dye-Sensitized Solar Cells (DSCs)Electrochemical ImpedanceOpen Circuit VoltageOpen Circuit Voltage DecaysPhoto-ElectrodePhotovoltaic PerformancePower Conversion EfficienciesShort-Circuit PhotocurrentSolar CellsSurface TreatmentTiCl4Titanium Dioxide
ISSN
1533-4880
Abstract
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.
URI
http://hdl.handle.net/20.500.11750/2993
DOI
10.1166/jnn.2014.10115
Publisher
American Scientific Publishers
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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