Here's the guy who is the lead on this kind of research. https://phys.org/news/2017-04-quantum-dots-emit-infrared-window.html

"Light-emitting particles have been a specialty of Bawendi, the Lester Wolf Professor of Chemistry, whose lab has over the years developed new ways of making quantum dots. These nanocrystals, made of semiconductor materials, emit light whose frequency can be precisely tuned by controlling the exact size and composition of the particles."