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Performance Enhancement of Dye-Sensitized Solar Cells with KMnO4-Modified Photoelectrodes

Title
Performance Enhancement of Dye-Sensitized Solar Cells with KMnO4-Modified Photoelectrodes
Authors
Ahn, HJ[Ahn, Hyo Jin]Lee, SW[Lee, Se Won]Sung, SJ[Sung, Shi-Joon]Lee, CH[Lee, Chang-Hyun]Kim, HM[Kim, Hwa-Min]Han, YS[Han, Yoon Soo]
DGIST Authors
Lee, SW[Lee, Se Won]
Issue Date
2016-10
Citation
Journal of Nanoscience and Nanotechnology, 16(10), 10420-10425
Type
Article
Article Type
Article
Keywords
Dye-Sensitized Solar Cells (DSCs)Electrochemical ImpedanceElectrodesElectrolytesOpen Circuit VoltageOpen Circuit Voltage DecaysPhoto-ElectrodePhoto-Injected ElectronsPotassium PermanganatePower Conversion EfficienciesRe-Configurable HardwareRecombinationShort-Circuit PhotocurrentSolar CellsTitanium Dioxide
ISSN
1533-4880
Abstract
In order to reduce the interfacial charge recombination between photoinjected electrons and triiodide ions in the electrolyte, a TiO2 surface was modified with potassium permanganate (PM). The PM-modified TiO2 electrodes were prepared by soaking the TiO2 films in an aqueous PM solution, and the resulting electrodes were applied to the photoanodes of dye-sensitized solar cells (DSSCs). The power conversion efficiency of a DSSC with a PM-modified TiO2 electrode was improved from that of the reference device without any modification, due to an enhancement in the open-circuit voltage (Voc), short-circuit photocurrent (Jsc), and fill factor (FF). By monitoring open-circuit voltage decay, electrochemical impedance, dark current, and UV-visible absorbance, it was revealed that the incorporation of the permanganate group on the TiO2 surface induced a longer electron lifetime because of the suppression of charge recombination between photoinjected electrons and I3 - ions, leading to the increase in Voc, Jsc, and FF. Copyright © 2016 American Scientific Publishers All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2183
DOI
10.1166/jnn.2016.13171
Publisher
American Scientific Publishers
Files:
There are no files associated with this item.
Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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