CoS/Nanocarbon Composite as a Catalytic Counter Electrode for Improved Performance of Quantum Dot-Sensitized Solar Cells
CoS/nanocarbon (NC) composites were prepared via a one-pot hydrothermal method and were used as counter electrodes (CEs) in quantum dot-sensitized solar cells (QDSCs). The CoS/nanocarbon (NC) composite thin film CE has been prepared via a one-pot hydrothermal method. Addition of NC to the solution b...
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Series: | Journal of Nanomaterials |
Online Access: | http://dx.doi.org/10.1155/2019/2710712 |
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doaj-ad6201f98c1b4dfcbf7f3012a271d6402020-11-25T01:29:35ZengHindawi LimitedJournal of Nanomaterials1687-41101687-41292019-01-01201910.1155/2019/27107122710712CoS/Nanocarbon Composite as a Catalytic Counter Electrode for Improved Performance of Quantum Dot-Sensitized Solar CellsWen Yang0Yang Sun1Peizhi Yang2Xiaobo Chen3Key Laboratory of Education Ministry for Advance Technique and Preparation of Renewable Energy Materials, Yunnan Normal University, Kunming 650500, ChinaSchool of New Energy and Electronic Engineering, Yancheng Teachers University, Yancheng 224051, ChinaKey Laboratory of Education Ministry for Advance Technique and Preparation of Renewable Energy Materials, Yunnan Normal University, Kunming 650500, ChinaSchool of New Energy and Electronic Engineering, Yancheng Teachers University, Yancheng 224051, ChinaCoS/nanocarbon (NC) composites were prepared via a one-pot hydrothermal method and were used as counter electrodes (CEs) in quantum dot-sensitized solar cells (QDSCs). The CoS/nanocarbon (NC) composite thin film CE has been prepared via a one-pot hydrothermal method. Addition of NC to the solution before hydrothermal treatment led to a CoS/NC composite with a good dispersion of conducting NC. The nanoscaled CoS in the composite CE provides abundant catalytic sites, and the carbon particle framework also acts as highly conductive paths for fast charge transport from the counter electrode (highly catalytic CoS active sites) to the photoanode. The optimized CoS/NC composite CE showed a two-order decrease in the charge-transfer resistance, compared to the pure CoS CE. The TiO2/CdS/CdSe/ZnS-based QDSC using the optimized CoS/NC composite CE shows enhanced photovoltaic performance with a power conversion efficiency of 4.46% and good stability (94.8% retention after 100 h continuous illumination).http://dx.doi.org/10.1155/2019/2710712 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Wen Yang Yang Sun Peizhi Yang Xiaobo Chen |
spellingShingle |
Wen Yang Yang Sun Peizhi Yang Xiaobo Chen CoS/Nanocarbon Composite as a Catalytic Counter Electrode for Improved Performance of Quantum Dot-Sensitized Solar Cells Journal of Nanomaterials |
author_facet |
Wen Yang Yang Sun Peizhi Yang Xiaobo Chen |
author_sort |
Wen Yang |
title |
CoS/Nanocarbon Composite as a Catalytic Counter Electrode for Improved Performance of Quantum Dot-Sensitized Solar Cells |
title_short |
CoS/Nanocarbon Composite as a Catalytic Counter Electrode for Improved Performance of Quantum Dot-Sensitized Solar Cells |
title_full |
CoS/Nanocarbon Composite as a Catalytic Counter Electrode for Improved Performance of Quantum Dot-Sensitized Solar Cells |
title_fullStr |
CoS/Nanocarbon Composite as a Catalytic Counter Electrode for Improved Performance of Quantum Dot-Sensitized Solar Cells |
title_full_unstemmed |
CoS/Nanocarbon Composite as a Catalytic Counter Electrode for Improved Performance of Quantum Dot-Sensitized Solar Cells |
title_sort |
cos/nanocarbon composite as a catalytic counter electrode for improved performance of quantum dot-sensitized solar cells |
publisher |
Hindawi Limited |
series |
Journal of Nanomaterials |
issn |
1687-4110 1687-4129 |
publishDate |
2019-01-01 |
description |
CoS/nanocarbon (NC) composites were prepared via a one-pot hydrothermal method and were used as counter electrodes (CEs) in quantum dot-sensitized solar cells (QDSCs). The CoS/nanocarbon (NC) composite thin film CE has been prepared via a one-pot hydrothermal method. Addition of NC to the solution before hydrothermal treatment led to a CoS/NC composite with a good dispersion of conducting NC. The nanoscaled CoS in the composite CE provides abundant catalytic sites, and the carbon particle framework also acts as highly conductive paths for fast charge transport from the counter electrode (highly catalytic CoS active sites) to the photoanode. The optimized CoS/NC composite CE showed a two-order decrease in the charge-transfer resistance, compared to the pure CoS CE. The TiO2/CdS/CdSe/ZnS-based QDSC using the optimized CoS/NC composite CE shows enhanced photovoltaic performance with a power conversion efficiency of 4.46% and good stability (94.8% retention after 100 h continuous illumination). |
url |
http://dx.doi.org/10.1155/2019/2710712 |
work_keys_str_mv |
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