Carrier localization in zero-dimensional and one-dimensional CdSe-CdS heterostructures.
J Chem Phys
; 156(6): 061102, 2022 Feb 14.
Article
in En
| MEDLINE
| ID: mdl-35168352
ABSTRACT
Mobile 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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
J Chem Phys
Year:
2022
Document type:
Article
Affiliation country:
Germany