Journal
CHEMICAL ENGINEERING JOURNAL
Volume 421, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.127756
Keywords
Dye-sensitized solar cells; Plasmonic; Electron transport; Hybrid composite; Stability
Categories
Funding
- Canada Foundation for Innovation
- Natural Science and Engineering Research Council (NSERC) of Canada
- MPB Technologies Inc.
- Plasmionique Inc.
- NSERC
- Canada Research Chairs program
- Fonds de recherche du Quebec-Nature et technologies (FRQNT)
- UNESCO Chair MATECSS
- University of Electronic Science and Technology of China
- Qingdao University
- Natural Science Foundation of Shandong Province [ZR2018MB001]
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The study presents a method to enhance the performance of DSSCs by preparing a nanocomposite of functional gold nanoparticles and multiwall carbon nanotubes, which are embedded in mesoporous TiO2 films as photoanodes. The use of this nanocomposite resulted in a significant improvement in power conversion efficiency and short-circuit photocurrent density compared to control cells based on TiO2 alone. Additionally, DSSCs utilizing the TiO2/AuNP/MWCNT photoanode exhibited remarkable stability, retaining 92% of the initial power conversion efficiency value after continuous illumination for ten days.
Improving the conversion efficiency of dye-sensitized solar cells (DSSCs) requires enhancing the photogeneration of charge carriers as well as facilitating their transport to electrodes before charge recombination or quenching can occur. Here we describe a simple, fast and large-area scalable procedure for the preparation of a nanocomposite made of functional gold nanoparticles (AuNPs) and multiwall carbon nanotubes (MWCNTs) to improve the performance of DSSCs. We fabricated AuNP/MWCNT inlaid mesoporous TiO2 films as photoanodes in DSSCs, to improve crucial factors including light absorption, charge-carrier generation, collection and transport. By using a AuNP/MWCNT nanocomposite directly inlaid in TiO2 as the working electrode, a power conversion efficiency (PCE) of 6.61% and short-circuit photocurrent density (Jsc) of 12.26 mA cm-2 were obtained, representing an enhancement of -31% in PCE and -19% in Jsc compared to a control cell based on TiO2 alone. In addition, DSSCs based on the TiO2/AuNP/MWCNT photoanode remained remarkably stable compared with the control device, retaining 92% of the initial PCE value after ten days of continuous illumination.
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