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Open Access Green möglich sobald Postprint bei der ZB eingereicht worden ist.
Sample-averaged biexciton quantum yield measured by solution-phase photon correlation.
Nano Lett. 14, 6792-6798 (2014)
The brightness of nanoscale optical materials such as semiconductor nanocrystals is currently limited in high excitation flux applications by inefficient multiexciton fluorescence. We have devised a solution-phase photon correlation measurement that can conveniently and reliably measure the average biexciton-to-exciton quantum yield ratio of an entire sample without user selection bias. This technique can be used to investigate the multiexciton recombination dynamics of a broad scope of synthetically underdeveloped materials, including those with low exciton quantum yields and poor fluorescence stability. Here, we have applied this method to measure weak biexciton fluorescence in samples of visible-emitting InP/ZnS and InAs/ZnS core/shell nanocrystals, and to demonstrate that a rapid CdS shell growth procedure can markedly increase the biexciton fluorescence of CdSe nanocrystals.
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Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Photon Correlation ; Multiexcitons ; Semiconductor Nanocrystals ; Single-molecule Spectroscopy
ISSN (print) / ISBN
1530-6984
e-ISSN
1530-6992
Zeitschrift
Nano Letters
Quellenangaben
Band: 14,
Heft: 12,
Seiten: 6792-6798
Verlag
American Chemical Society (ACS)
Nichtpatentliteratur
Publikationen
Begutachtungsstatus
Peer reviewed
Institut(e)
Helmholtz Pioneer Campus (HPC)