%0 Generic %1 eckstein2021diffusive %A Eckstein, Klaus H. %A Kunkel, Pascal %A Voelckel, Markus %A Schöppler, Friedrich %A Abudulimu, Abasi %A Lüer, Larry %A Hertel, Tobias %D 2021 %K doping excitons myown swnt %T Diffusive and Unimolecular Nonradiative Decay of Excited States in Doped Carbon Nanotubes %U http://arxiv.org/abs/2103.15477 %X Doping can profoundly affect the electronic- and optical-structure of semiconductors. Here we address the effect of surplus charges on non-radiative (NR) exciton and trion decay in doped semiconducting single-wall carbon nanotubes. The dependence of exciton photoluminescence quantum yields and exciton decay on the doping level, with its characteristically stretched-exponential kinetics, is attributed to diffusion-limited NR decay at charged impurity sites. By contrast, trion decay is unimolecular with a rate constant of $2.0\,ps^-1$. Our experiments thus show that charged impurities not only trap trions and scavenge mobile excitons but that they also facilitate efficient NR energy dissipation for both.

@preprint{eckstein2021diffusive, abstract = {Doping can profoundly affect the electronic- and optical-structure of semiconductors. Here we address the effect of surplus charges on non-radiative (NR) exciton and trion decay in doped semiconducting single-wall carbon nanotubes. The dependence of exciton photoluminescence quantum yields and exciton decay on the doping level, with its characteristically stretched-exponential kinetics, is attributed to diffusion-limited NR decay at charged impurity sites. By contrast, trion decay is unimolecular with a rate constant of $2.0\,\rm ps^{-1}$. Our experiments thus show that charged impurities not only trap trions and scavenge mobile excitons but that they also facilitate efficient NR energy dissipation for both.}, added-at = {2021-04-01T14:02:18.000+0200}, author = {Eckstein, Klaus H. and Kunkel, Pascal and Voelckel, Markus and Schöppler, Friedrich and Abudulimu, Abasi and Lüer, Larry and Hertel, Tobias}, biburl = {https://www.bibsonomy.org/bibtex/2f40431ba91f99da43c868111b514aa2a/hertel-group}, description = {[2103.15477] Diffusive and Unimolecular Nonradiative Decay of Excited States in Doped Carbon Nanotubes}, interhash = {60398d30801271646a4ef7dacec664fa}, intrahash = {f40431ba91f99da43c868111b514aa2a}, keywords = {doping excitons myown swnt}, note = {cite arxiv:2103.15477}, timestamp = {2021-04-01T14:02:18.000+0200}, title = {Diffusive and Unimolecular Nonradiative Decay of Excited States in Doped Carbon Nanotubes}, url = {http://arxiv.org/abs/2103.15477}, year = 2021 }