Biorenewable Solvents for High-Performance Organic Solar Cells.

Area of Science:

• Materials Science
• Renewable Energy
• Organic Electronics

Background:

• Organic photovoltaic (OPV) devices achieve high power conversion efficiencies (PCEs) with nonfullerene acceptors (NFAs).
• Current high-performance OPVs rely on toxic, petroleum-based solvents, hindering sustainable mass manufacturing.
• Developing greener processing methods is crucial for commercializing OPVs.

Purpose of the Study:

• To investigate the use of biorenewable solvents for processing OPV active layers.
• To reduce the environmental impact and carbon footprint of OPV manufacturing.
• To demonstrate high-performance OPVs fabricated using sustainable solvents and materials.

Main Methods:

• Processing donor: NFA-based OPVs using biorenewable solvents 2-methyltetrahydrofuran (2MeTHF) and cyclopentyl methyl ether (CPME).
• Utilizing polymeric donors (PTQ10 and FO6-T) with a Y-series NFA (Y12) requiring minimal synthesis.
• Evaluating OPV performance without additional additives in the active layer.

Main Results:

• High PCEs achieved using 2MeTHF as the processing solvent.
• PTQ10:Y12 blends reached 14.5% PCE.
• FO6-T:Y12 blends reached 11.4% PCE.

Conclusions:

• Biorenewable solvents like 2MeTHF can effectively process OPV active layers without additives.
• This approach facilitates large-scale and environmentally friendly manufacturing of organic solar cells.
• The study paves the way for sustainable commercialization of OPV technology.