Staechelin, Yannic U.Yannic U.StaechelinDeffner, MichaelMichaelDeffnerKrohn, SonjaSonjaKrohnCastillo Delgadillo, ChristianChristianCastillo DelgadilloNiehaus, Jan SteffenJan SteffenNiehausLange, HolgerHolgerLange2023-02-072023-02-072022-02-09https://publica.fraunhofer.de/handle/publica/43567310.1063/5.00796192-s2.0-8512467037635168352Mobile charge carriers in heterostructured nanoparticles are relevant for applications requiring charge separation and extraction. We investigate the benchmark systems CdSe-CdS core-shell quantum dots and quantum dots in quantum rods by optical and THz pump-probe spectroscopy. We relate photoconductivity and carrier location and observe that only shell-located electrons in quantum rods contribute to an observable photoconductivity. Despite the shallow electron confinement in the quasi-type II heterostructures, core-located carriers are bound into immobile excitons that respond on external electrical fields by polarization.enjournal article