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Improved performance of dye-sensitized solar cells with novel conjugated organic dye using aluminum oxide-coated nanoporous titanium oxide films

Title
Improved performance of dye-sensitized solar cells with novel conjugated organic dye using aluminum oxide-coated nanoporous titanium oxide films
Authors
Jo, Hyo JeongNam, Jung EunKim, Dae-HwanKang, Jin-Kyu
DGIST Authors
Kim, Dae-HwanKang, Jin-Kyu
Issue Date
2014-03-01
Citation
Journal of Power Sources, 249, 385-391
Type
Article
Article Type
Article
Keywords
AdsorptionAluminumAluminum Oxide BarriersAluminum OxidesDye-Sensitized Solar CellDye-Sensitized Solar Cells (DSCs)Dye AdsorptionElectro-Chemical Impedance Spectroscopy (EIS)ElectrodesElectron TunnelingIntensity Modulated Photocurrent Spectroscopy (IMPS)Intensity Modulated Photovoltage Spectroscopies (IMVS)Molar Extinction CoefficientOxide FilmsOxidesPhotoelectrochemical CellsPhotovoltaic PerformanceRutheniumSolar CellsTitaniumTitanium DioxideTitanium Oxide/Dye/Electrolyte InterfaceTunneling
ISSN
0378-7753
Abstract
This work introduces the TiO2/dye/electrolyte interface in the recombination and offers an interface treatment method using solution process for dye-sensitized solar cells (DSSCs). Solution-processed ultra-thin metal oxides introduce to treat the surface of mesoporous TiO2 to reduce the defect density and improve the electronic quality. Among the metal oxides, an Al2O3 barrier is incorporated into DSSCs as a carrier-recombination blocking layer. In all instances, the short-circuit current density increase and the dark current is suppressed after Al 2O3 deposition. The impact of the Al2O 3 barriers is also studied in devices employing different dyes. To compare the behavior of metal-free organic dyes and Ru dyes when Al 2O3 barrier layers are involved, the charge transfer between the dye and TiO2 electrodes, associated with interfacial electron injection, is investigated by Raman spectroscopy. The metal-free organic dye had a high molar extinction coefficient and better adsorption properties compare to Ru dye, which resulted in higher charge-collection efficiency. To verify the strategy, the DSSCs photovoltaic performances containing these dyes are compared using their current-voltage curves. Electrochemical impedance spectroscopy (EIS), Intensity Modulated Photocurrent Spectroscopy (IMPS), and Intensity Modulated photoVoltage Spectroscopy (IMVS) were used to further investigate the kinetics process of the TiO2 film electrodes. © 2013 Elsevier B.V. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5263
DOI
10.1016/j.jpowsour.2013.10.051
Publisher
Elsevier B.V.
Related Researcher
Files:
There are no files associated with this item.
Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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