Precisely determining the energy levels of different solar materials for high-performance devices

https://phys.org/news/2022-09-precisely-energy-solar-materials-high-performance.html

"analyzed energy level alignment in 12 donor–acceptor organic solar cell blends... blends with little to no difference in one energy level metric, onization energy, were poor performers... best performing organic solar cells had a significant difference in ionization energy between donor and acceptor component in blend... what is commonly believed in literature is actually not true... huge potential to reveal new donor–acceptor pair systems work well in organic solar cells and would also highlight which pairs won't work"