Highly Luminescent Monodisperse CdSe and CdSe/ZnS Nanocrystals Synthesized in a Hexadecylamine−Trioctylphosphine Oxide−Trioctylphospine Mixture

Highly monodisperse CdSe nanocrystals were prepared in a three-component hexadecylamine−trioctylphosphine oxide−trioctylphosphine (HDA−TOPO−TOP) mixture. This modification of the conventional organometallic synthesis of CdSe nanocrystals in TOPO−TOP provides much better control over growth dynamics,...

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Bibliographic Details
Published in:Nano letters 2001-04, Vol.1 (4), p.207-211
Main Authors: Talapin, Dmitri V., Rogach, Andrey L., Kornowski, Andreas, Haase, Markus, Weller, Horst
Format: Article
Language:English
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Summary:Highly monodisperse CdSe nanocrystals were prepared in a three-component hexadecylamine−trioctylphosphine oxide−trioctylphosphine (HDA−TOPO−TOP) mixture. This modification of the conventional organometallic synthesis of CdSe nanocrystals in TOPO−TOP provides much better control over growth dynamics, resulting in the absence of defocusing of the particle size distribution during growth. The room-temperature quantum efficiency of the band edge luminescence of CdSe nanocrystals can be improved to 40−60% by surface passivation with inorganic (ZnS) or organic (alkylamines) shells.
ISSN:1530-6984
1530-6992
DOI:10.1021/nl0155126