Abstract
We describe the synthesis of ZnS-capped CdSe semiconductor nanocrystals using organometallic reagents by a two-step single-flask method. X-ray photoelectron spectroscopy, transmission electron microscopy and optical absorption are consistent with nanocrystals containing a core of nearly monodisperse CdSe of 27−30 Å diameter with a ZnS capping 6 ± 3 Å thick. The ZnS capping with a higher bandgap than CdSe passivates the core crystallite removing the surface traps. The nanocrystals exhibit strong and stable band-edge luminescence with a 50% quantum yield at room temperature.
Keywords
NanocrystalChemistryCrystalliteX-ray photoelectron spectroscopyLuminescenceTransmission electron microscopyPhotoluminescenceQuantum dotBand gapQuantum yieldAbsorption (acoustics)Absorption edgeDispersitySemiconductorNanotechnologyAnalytical Chemistry (journal)Chemical engineeringOptoelectronicsCrystallographyMaterials scienceOpticsFluorescenceOrganic chemistry
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Publication Info
- Year
- 1996
- Type
- article
- Volume
- 100
- Issue
- 2
- Pages
- 468-471
- Citations
- 2796
- Access
- Closed
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Cite This
Margaret A. Hines,
Philippe Guyot‐Sionnest
(1996).
Synthesis and Characterization of Strongly Luminescing ZnS-Capped CdSe Nanocrystals.
The Journal of Physical Chemistry
, 100
(2)
, 468-471.
https://doi.org/10.1021/jp9530562
Identifiers
- DOI
- 10.1021/jp9530562