High performance molecular donors for organic solar cells, materials design and device optimization

Abstract

We demonstrate the development of high performance molecular donors for the use in organic solar cells. We modified the known BTR small molecule donor to reduce diffusion rates during thermal annealing by chromophore extension to generate BQR. OPV devices containing BQR are thermally stable, with average PCEs of around 10%. Active layers containing BQR can be deposited from industrially relevant solvents using slot die printing. We demonstrate that simple slot die printed 1 cm2 OPV devices using toluene as a solvent with around 6% PCE.