Copper(I) dye-sensitized solar cells with [Co(bpy)3](2+/3+) electrolyte

Area of Science:

• Materials Science
• Electrochemistry
• Photovoltaics

Background:

• Dye-sensitized solar cells (DSCs) are a promising photovoltaic technology.
• Traditional DSCs often rely on iodide/triiodide (I(-)/I3(-)) electrolytes, which can have drawbacks.
• Developing alternative electrolytes is crucial for improving DSC stability and efficiency.

Purpose of the Study:

• To describe the hierarchical assembly of DSCs incorporating a novel heteroleptic copper(I) complex.
• To investigate the feasibility of replacing conventional I(-)/I3(-) electrolytes with cobalt-based redox mediators.
• To evaluate the performance of DSCs using the new copper complex and cobalt electrolytes.

Main Methods:

• Synthesis and characterization of a new heteroleptic copper(I) complex with a phosphonic acid anchoring ligand.
• Fabrication of DSCs utilizing the synthesized copper complex.
• Electrochemical testing and performance evaluation of DSCs with both conventional I(-)/I3(-) and cobalt-based ([Co(bpy)3](2+/3+)) electrolytes.

Main Results:

• Successful hierarchical assembly of DSCs with the new copper(I) complex.
• Demonstration that [Co(bpy)3](2+/3+) electrolytes can be used as an alternative to I(-)/I3(-) electrolytes.
• No loss in photovoltaic performance was observed when using the cobalt-based electrolyte compared to the conventional one.

Conclusions:

• The new heteroleptic copper(I) complex is suitable for constructing efficient DSCs.
• Cobalt-based redox mediators offer a viable alternative to iodide electrolytes in DSCs.
• This advancement opens new avenues for designing high-performance, potentially more stable dye-sensitized solar cells.