Efficient dyad-based organic solar cells with a highly crystalline donor group

Area of Science:

• Materials Science
• Organic Electronics
• Photovoltaics

Background:

• Organic solar cells (OSCs) offer potential for low-cost, flexible energy generation.
• Improving the efficiency and stability of donor-acceptor systems in OSCs is crucial.
• Oligo(p-phenylenevinylene) (OPV) and fullerene derivatives are common components in OSCs.

Purpose of the Study:

• To synthesize and characterize a novel OPV-fullerene dyad.
• To investigate the impact of intermolecular pi-pi interactions on device performance.
• To achieve high power conversion efficiency (PCE) in dyad-based solar cells.

Main Methods:

• Synthesis of a specific OPV-fullerene dyad.
• Fabrication of solar cells utilizing the synthesized dyad.
• Characterization of device performance, including fill factor and PCE.

Main Results:

• The novel dyad exhibited strong intermolecular pi-pi interactions between donor groups.
• Achieved a fill factor of up to 0.44.
• Reached a power conversion efficiency of 1.28%.

Conclusions:

• The developed OPV-fullerene dyad represents a significant advancement in organic solar cell technology.
• The strong intermolecular interactions are key to the improved device performance.
• The reported efficiency and fill factor are the highest to date for dyad-based solar cells.