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Low-Cost Nanoporous Cu2ZnSnS4 Thin-Film Counter Electrode for Dye-Sensitized Solar Cells

Title
Low-Cost Nanoporous Cu2ZnSnS4 Thin-Film Counter Electrode for Dye-Sensitized Solar Cells
Authors
Park, Si-NaeSung, Shi-JoonYang, Kee-JeongKang, Jin-KyuKim, Dae-Hwan
DGIST Authors
Sung, Shi-Joon; Yang, Kee-JeongKang, Jin-KyuKim, Dae-Hwan
Issue Date
2016-10
Citation
Journal of Nanoscience and Nanotechnology, 16(10), 10490-10494
Type
Article
Article Type
Article
Keywords
AnnealingAnnealing TemperaturesConversion EfficiencyCopperCounter ElectrodeCounter Electrode MaterialsCounter ElectrodesCu2ZnSnS4Dye-Sensitized Solar Cells (DSCs)EfficiencyElectro-Chemical ElectrodesElectrodesFilm PreparationNano-Porous MorphologiesNano-Structured MaterialsPhotovoltaic CharacteristicsPhotovoltaic PerformancePlatinumPower Conversion EfficienciesScanning Electron MicroscopySol-Gel ProcessSol-GelsSolar CellsSolar Power GenerationStructure and MorphologyThin-FilmsThin FilmX Ray Diffraction
ISSN
1533-4880
Abstract
The Cu2ZnSnS4 thin film is a well-known and promising electrode material to substitute for the expensive Pt counter electrode used in dye-sensitized solar cells. In this work, we have proposed a novel nanoporous Cu2ZnSnS4 thin film prepared by a simple and non-toxic process for use as the counter-electrode material. The Cu2ZnSnS4 thin film was easily prepared by a simple spin coating process using a sol-gel precursor that consists of metal chlorides and thiourea, followed by thermal annealing. By manipulating the thermal annealing conditions, a Cu2ZnSnS4 thin film with unique nanoporous morphology could be realized, and this film was very effective as the counter electrode owing to its large surface area. Because the size of Cu2ZnSnS4 nanograins was affected by the thermal annealing temperature, the scale of the nanoporous structures of the Cu2ZnSnS4 counter electrode, which significantly affects the photovoltaic characteristics of dye-sensitized solar cells, could be controlled by manipulating the annealing temperature. The structure and morphology of nanoporous Cu2ZnSnS4 thin films were characterized via X-ray diffraction and scanning electron microscopy analysis, and the photovoltaic performance of dye-sensitized solar cells based on the nanoporous Cu2ZnSnS4 counter electrode was also investigated. The nanoporous Cu2ZnSnS4 counter electrode exhibited a power conversion efficiency of 4.494% under 100 mW/cm2 AM 1.5 simulated light, Voc of 0.610 V, Jsc of 10.46 mA/cm2, and FF of 70.44%, and this power conversion efficiency was comparable to that of a conventional Pt counter electrode (5.719%) for the same device configuration. Copyright © 2016 American Scientific Publishers All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5074
DOI
10.1166/jnn.2016.13182
Publisher
American Scientific Publishers
Related Researcher
Files:
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Collection:
Convergence Research Center for Solar Energy1. Journal Articles


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