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Improved Photovoltaic Properties of Dye-Sensitized Solar Cells with KNO3-Modified Photoelectrodes

Title
Improved Photovoltaic Properties of Dye-Sensitized Solar Cells with KNO3-Modified Photoelectrodes
Authors
Oh, JH[Oh, Ju Hee]Lee, SJ[Lee, Sang-Ju]Kim, DH[Kim, Dae-Hwan]Sung, SJ[Sung, Shi-Joon]Lee, MH[Lee, Min Ho]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), 8859-8863
Type
Article
Article Type
Article
Keywords
Charge RecombinationsDye-Sensitized Solar CellDye-Sensitized Solar Cells (DSCs)Electro-Chemical Impedance Spectroscopy (EIS)ElectrodesKNO3Open Circuit VoltageOpen Circuit Voltage DecaysPhoto-ElectrodePhotovoltaic PropertyPower Conversion EfficienciesRecombinationSolar CellsSolar Power GenerationSurface ModifierSurface ModifiersSurface TreatmentTitanium Dioxide
ISSN
1533-4880
Abstract
The surface of a TiO2 photoelectrode was modified through a dip-coating process using an aqueous potassium nitrate (KNO3) solution to increase the power-conversion efficiency of dye-sensitized solar cells (DSSCs). The KNO3-modified TiO2 electrode was applied to the photoanode of the DSSCs. The DSSC with the KNO3-modified TiO2 electrode exhibited a short-circuit current (Jsc) of 15.26 mA/cm2 and an open-circuit voltage (Voc) of 671 mV, compared with a Jsc of 13.74 mA/cm2 and Voc of 654 mV for a reference device with a pristine TiO2 electrode. The results in combination with relevant data from electrochemical impedance spectroscopy, open-circuit voltage decay, and dark current measurements revealed that the modification of the TiO2 surface using the surface modifier (KNO3) led to a longer electron lifetime by the suppression of the charge recombination between injected electrons and I-3 ions, resulting in an increase in both Jsc and Voc, compared with those of the reference device without surface modification. Copyright © 2015 American Scientific Publishers All rights reserved.
URI
http://hdl.handle.net/20.500.11750/2824
DOI
10.1166/jnn.2015.11520
Publisher
American Scientific Publishers
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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