When light strikes cadmium selenimide nanocrystals (quantum dots), electron hole pairs are produced. The excited electrons can create a current in thin-layer titanium dioxide solar cells. The ability of quantum dots to absorb visible and infrared light across a broad band gap may be the key to the production of more efficient methods of harvesting solar-powered energy.
Valerie Collins, ’10 Kenosha, WI
Sponsor: Derin Sherman