Researchers at Notre Dame have developed a paste of semiconducting nanoparticles called solar paint (or "Sunbelievable") that could lead to easier-to-produce solar cells.
First, they mix t-butanol, water, cadmium sulfide and titanium dioxide for 30 minutes. Next, they mask off a clear electrode with office tape. Once the tape is in place, they spread the mixture onto the electode and then anneal it with a heat gun. Finally, they sandwich an electrolyte solution between the new electrode and a graphene composite electrode. And then, it's time for testing under a beam of artificial light.
The best performing cell paint's light-to-electricity efficiency is 1% so far. The
efficiencies of commercial silicon solar cells are usually between 10
and 15%. The paints’ efficiencies, although low, are “quite decent” for a first-generation material. Read more: cen.acs.org