Innovalight says that by controlling the sizes of the dots (from 2 to 10 nanometers) the company can tailor what part of the light spectrum is absorbed. This allows capture of everything from infrared to ultraviolet and the visible spectrum in between which is not possible with conventional technology.
Solar ink? Yes, Innovalight, a start-up company in California, plans to produce a liquid "silicon nanomaterial" using "quantum dots" which can be printed using the same roll-to-roll printing technology used for printing on paper. This means it will be able to put the ink on flexible surfaces like clothing and portable chargers.