A "roller-wheel" Pt-containing small molecule that outperforms its polymer analogs in organic solar cells.

A novel Pt-bisacetylide small molecule () featuring "roller-wheel" geometry was synthesized and characterized. When compared with conventional Pt-containing polymers and small molecules having "dumbbell" shaped structures, displays enhanced crystallinity and intermolecular π-π interactions, as well as favorable panchromatic absorption behaviors. Organic solar cells (OSCs) employing achieve power conversion efficiencies (PCEs) up to 5.