Process for Synthesis of Fullerene Acceptors for Organic Solar Cells

The existing [6,6]-phenyl-C₆₁-butyric acid methyl ester (PC₆₁BM) and the new acceptor molecule [6,6]-phenyl-C₆₁-butyric acid pentyl ester (PC₆₁BP) are prepared via a cost-effective route. More particularly, the present invention relates to a process for the preparation of fullerene acceptors under aerobic conditions (in air), showing performance equivalent to the state of the art. More importantly, this process enables the low-cost synthesis of PC₆₁BM and PC₆₁BP in good yield without involving harmful or expensive catalysts or chemicals, thereby reducing the overall production cost.

Organic electronic applications such as Organic Solar Cells, Perovskite Solar Cells, Photodetectors, Field-Effect Transistors, Flexible and Printed Electronics, Electron Transport Layers (ETLs) in Optoelectronic Devices, etc.

A cost-effective, environmentally friendly synthesis of PC61BM and PC61BP in good yield without the use of harmful or expensive catalysts, reducing overall production cost.