Kinder, Jesse M.Mele, Eugene J.2023-05-232023-05-232008-10-272011-01-13https://repository.upenn.edu/handle/20.500.14332/43430Free electrons or holes can mediate the nonradiative recombination of excitons in carbon nanotubes. Kinematic constraints arising from the quasi-one-dimensional nature of excitons and charge carriers lead to a thermal activation barrier for the process. However, a model calculation suggests that the rate of recombination mediated by a free electron is the same order of magnitude as that of two-exciton recombination. Small amounts of doping may contribute to the short exciton lifetimes and low quantum yields observed in carbon nanotubes.Physical Sciences and MathematicsPhysicsArticle