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Incorporation of Potassium Water Glass on Photoelectrodes and Its Effects on the Performance of Dye-Sensitized Solar Cells

Title
Incorporation of Potassium Water Glass on Photoelectrodes and Its Effects on the Performance of Dye-Sensitized Solar Cells
Authors
Oh, JH[Oh, Ju Hee]Lee, SJ[Lee, Sang-Ju]Kim, DH[Kim, Dae-Hwan]Sung, SJ[Sung, Shi-Joon]Kang, CS[Kang, Cheon Su]Han, YS[Han, Yoon Soo]
DGIST Authors
Oh, JH[Oh, Ju Hee]; Lee, SJ[Lee, Sang-Ju]; Kim, DH[Kim, Dae-Hwan]
Issue Date
2015-11
Citation
Journal of Nanoscience and Nanotechnology, 15(11), 8854-8858
Type
Article
Article Type
Article
Keywords
Charge RecombinationsDye-Sensitized Solar Cells (DSCs)Electro-Chemical Impedance Spectroscopy (EIS)ElectrodesGlassOpen Circuit VoltageOpen Circuit Voltage DecaysPhoto-ElectrodePhotovoltaic EffectsPhotovoltaic PropertyPotassium Water GlassPower Conversion EfficienciesShort-Circuit PhotocurrentSolar CellsSolar Power GenerationSurface ModifierSurface ModifiersSurface TreatmentTitanium DioxideWater Glass
ISSN
1533-4880
Abstract
We applied potassium water glass (PWG) for a modification of photoelectrodes and investigated the effects of this modification on the photovoltaic properties of dye-sensitized solar cells (DSSCs). The PWG-modified TiO2 electrodes were prepared by soaking the TiO2 films in an aqueous PWG solution, and the resulting electrodes were applied to the photoanodes of DSSCs. Compared with a reference device with pristine TiO2 electrode, the power conversion efficiency of a DSSC with a PWG-modified TiO2 electrode was improved by about 26% because of the enhanced shortcircuit photocurrent (Jsc) and open-circuit voltage (Voc). Open-circuit voltage decay, electrochemical impedance spectroscopy, and dark current measurements revealed that the incorporation of PWG on the TiO2 surface led to a longer electron lifetime because of the suppression of charge recombination between injected electrons and I- 3 ions, which, compared with a reference device without surface modification, resulted in an increase in both Jsc and Voc. Copyright © 2015 American Scientific Publishers All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2825
DOI
10.1166/jnn.2015.11519
Publisher
American Scientific Publishers
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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