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High-performance printable electrolytes for dye-sensitized solar cells

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Abstract

High-performance quasi-solid-state electrolytes with printable characteristics are developed herein for dye-sensitized solar cells (DSSCs). The printable electrolytes are prepared based on a 3-methoxypropionitrile liquid electrolyte containing I/I3 redox couples. Poly(ethylene oxide) (PEO) and poly(vinylidene fluoride) (PVDF) are utilized as agents to regulate the viscosity and properties of the electrolyte pastes; furthermore, TiO2 nanoparticles are used as a filler to enhance the performance of the electrolytes. The results show that PEO is a required material to prepare the electrolyte pastes for operation by a printing process. However, if only PEO is utilized, the conversion efficiency of the corresponding cell (7.65%) is much lower than that of the liquid one (8.34%). By introducing PVDF as a co-regulating agent, the resultant cell can achieve an efficiency of 8.32% similar to that of the liquid cell, mainly attributed to the decrease of charge transfer resistance at the electrolyte/Pt counter electrode interface. In addition, if 4 wt% TiO2 nanoparticles are introduced as fillers into the printable electrolyte, the cell efficiency can be further increased to 8.91%. By applying this printable electrolyte to a sub-module cell, a conversion efficiency of 6.45% is achieved. The DSSCs prepared by the printing process are stable under a long-term stability test at 60 °C.

Graphical abstract: High-performance printable electrolytes for dye-sensitized solar cells

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Publication details

The article was received on 13 Feb 2017, accepted on 10 Apr 2017 and first published on 12 Apr 2017


Article type: Paper
DOI: 10.1039/C7TA01341H
Citation: J. Mater. Chem. A, 2017, Advance Article
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    High-performance printable electrolytes for dye-sensitized solar cells

    I. Liu, W. Hung, H. Teng, S. Venkatesan, J. Lin and Y. Lee, J. Mater. Chem. A, 2017, Advance Article , DOI: 10.1039/C7TA01341H

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