High efficiency dye-sensitized nanocrystalline solar cells based on ionic liquid polymer gel electrolyte

Area of Science:

• Materials Science
• Electrochemistry
• Renewable Energy

Background:

• Dye-sensitized solar cells (DSSCs) are a promising photovoltaic technology.
• Developing stable and efficient quasi-solid-state electrolytes is crucial for DSSC commercialization.
• Ionic liquid polymer gels offer potential advantages over liquid electrolytes.

Purpose of the Study:

• To investigate the performance of an ionic liquid polymer gel as a quasi-solid-state electrolyte in DSSCs.
• To evaluate the impact of this electrolyte on the overall conversion efficiency of nanocrystalline TiO2 solar cells.

Main Methods:

• Fabrication of a quasi-solid-state electrolyte using 1-methyl-3-propylimidazolium iodide (MPII) and poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP).
• Integration of the electrolyte into dye-sensitized nanocrystalline TiO2 solar cells.
• Performance testing under AM 1.5 illumination.

Main Results:

• The developed ionic liquid polymer gel electrolyte was successfully employed in DSSCs.
• The solar cells achieved an overall conversion efficiency of 5.3% under AM 1.5 illumination.
• The use of MPII and PVDF-HFP contributed to the quasi-solid-state nature of the electrolyte.

Conclusions:

• Ionic liquid polymer gels are viable quasi-solid-state electrolytes for DSSCs.
• The fabricated DSSCs demonstrate competitive conversion efficiency.
• Further research into ionic liquid polymer gel electrolytes could lead to improved photovoltaic devices.