Chemistry Faculty Publications
Title
Radiative Recombination Of Spatially Extended Excitons In (znse/cds)/cds Heterostructured Nanorods
Document Type
Article
Abstract
We report on organometallic synthesis of luminescent (ZnSe/CdS)/CdS semiconductor heterostructured nanorods (hetero-NRs) that produce an efficient spatial separation of carriers along the main axis of the structure (type II carrier localization). Nanorods were fabricated using a seeded-type approach by nucleating the growth of 20-100 nm CdS extensions at [000 +/- 1] facets of wurtzite ZnSe/CdS core/shell nanocrystals. The difference in growth rates of CdS in each of the two directions ensures that the position of ZnSe/CdS seeds in the final structure is offset from the center of hetero-NRs, resulting in a spatially asymmetric distribution of carrier wave functions along the heterostructure. Present work demonstrates a number of unique properties of (ZnSe/CdS)/CdS hetero-NRs, including enhanced magnitude of quantum confined Stark effect and subnanosecond switching of absorption energies that can find practical applications in electroabsorption switches and ultrasensitive charge detectors.
Copyright Statement
Publisher PDF
Repository Citation
Hewa-Kasakarage, Nishshanka N.; Kirsanova, Maria; Nemchinov, Alexander; Schmall, Nickolas; El-Khoury, Patrick Z.; Tarnovsky, Alexander N.; and Zamkov, Mikhail, "Radiative Recombination Of Spatially Extended Excitons In (znse/cds)/cds Heterostructured Nanorods" (2009). Chemistry Faculty Publications. 55.
https://scholarworks.bgsu.edu/chem_pub/55
Publication Date
1-2009
Publication Title
Journal Of The American Chemical Society
DOI
https://doi.org/10.1021/ja8082895
Start Page No.
1328
End Page No.
1334