How One Photon Becomes Four Charge Carriers
Illustration of exciton splitting in the organic semiconductor pentacene, which consists of five benzene rings each. Instead of the usual two free charge carriers, absorption of a photon in pentacene generates four free charge carriers, represented by orange tracks. Credit: TU BerlinSome materials convert photons into more free charges than would be expected. Using an ultrafast film, researchers have now been able to get a picture of this process.Researchers at the Fritz Haber Institute of the Max Planck Society, the…