Rapid double-dye-layer coating for dye-sensitized solar cells using a new method

Area of Science:

• Renewable Energy
• Materials Science
• Electrochemistry

Background:

• Dye-sensitized solar cells (DSSCs) are a promising renewable energy technology.
• Current DSSC production faces challenges with time-consuming dye-coating processes.
• Ruthenium-based dyes are commonly used but require lengthy absorption times on photoanodes.

Purpose of the Study:

• To develop an efficient and rapid dye-coating method for DSSCs.
• To reduce the processing time for dye absorption onto photoanodes.
• To investigate the impact of a novel mixed solvent system on DSSC performance.

Main Methods:

• A mixed solvent system of ethylene glycol (EG) and glycerol (Gly) was employed for dye coating.
• The dye-coating time was significantly reduced compared to conventional methods.
• Optimized EG/Gly ratios were tested to determine maximum performance.

Main Results:

• Dye-coating time was reduced to as little as 5 minutes.
• A maximum energy conversion efficiency of 9.1% was achieved with an optimal EG/Gly ratio (1:1).
• The viscous solvent system allowed for controlled dye coating depth, enhancing fabrication.
• A dual-dye system (N719 + black dye) achieved 9.4% efficiency.

Conclusions:

• The developed EG/Gly mixed solvent system offers a rapid and effective method for dye coating in DSSCs.
• This technique significantly shortens production time and maintains or improves cell efficiency.
• The controlled coating depth capability offers further advantages for DSSC fabrication and optimization.