Synthesis and characterization of highly luminescent ZnS-passivated CdS:Mn (CdS:Mn/ZnS) core/shell structured nanocrystals are reported. Mn-doped CdS core nanocrystals are produced ranging from 1.5 to 2.3 nm in diameter with epitaxial ZnS shell of wider band gap via a reverse micelle process. UV irradiation-stimulated photo-oxidation of the ZnS shell results in formation of sulfate as determined by x-ray photoelectron spectroscopy, which increases the photoluminescence emission intensity and subsequent photostability. Luminescent relaxation lifetime data present two different decay components, consisting of slow decay emission from the Mn center and a fast decay emission from a defect-related center. The impact of the density of surface defect states upon the emission spectra is discussed.
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22 November 2004
Research Article|
November 22 2004
CdS:Mn nanocrystals passivated by ZnS: Synthesis and luminescent properties
J. Chem. Phys. 121, 10233–10240 (2004)
Article history
Received:
May 18 2004
Accepted:
August 30 2004
Citation
Heesun YangPaul H. HollowayGarry CunninghamKirk S. Schanze; CdS:Mn nanocrystals passivated by ZnS: Synthesis and luminescent properties. J. Chem. Phys. 22 November 2004; 121 (20): 10233–10240. https://doi.org/10.1063/1.1808418
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