SEARCH Articles Figures Tables Donor Franck-Condon excited state Donor surface state Neutral donor states, exciton Neutral donor states, exciton transitions from Organic using triplet-state donor Oxygen singlet state donor Primary donor triplet states Quenching primary donor triplet states Semiconductors donor states Singlet state hydride donors States donor/acceptor Transitions from neutral donor states Transitions from neutral donor states excitons Triplet-State Radical Pairs from the Photoreduction of Benzophenone by Hydrogen Donors