Synthesis and characterization of strongly luminescing ZnS-capped CdSe nanocrystals
Journal Article
·
· Journal of Physical Chemistry
- Univ. of Chicago, IL (United States)
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 A diameter with a ZnS capping 6{+-}3 A 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. 23 refs., 4 figs.
- OSTI ID:
- 196641
- Journal Information:
- Journal of Physical Chemistry, Journal Name: Journal of Physical Chemistry Journal Issue: 2 Vol. 100; ISSN JPCHAX; ISSN 0022-3654
- Country of Publication:
- United States
- Language:
- English
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