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Characterization of semiconductor core-shell nanoparticles by resonant Raman scattering and photoluminescence spectroscopy |
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| Authors: | VM Dzhagan M Ya Valakh AL Stroyuk DRT Zahn |
| Institution: | a Institute of Semiconductors Physics, National Acad. Sci. of Ukraine, Prospekt Nauky 41, Kyiv 03028, Ukraine b Institute of Physical Chemistry, National Acad. Sci. of Ukraine, Prospekt Nauky 31, Kyiv 03028, Ukraine c Institut für Physik, Technische Universität Chemnitz, Reichenhainer Str. 70, Chemnitz D-09107, Germany |
| Abstract: | Colloidal CdSe nanoparticles (NPs), passivated with CdS and ZnS, were characterized by resonant Raman scattering and photoluminescence (PL). The effect of the passivating shell, its volume and formation procedure on optical and vibrational spectra is discussed. Analyzing the Raman peaks due to optical phonons inside the core and those related to the core-shell interface allows some understanding of the relation between the core-shell structure and its PL properties to be achieved. In particular, a compositional intermixing at the core/shell interface of the NPs was deduced from the Raman spectra, which can noticeably affect their PL intensity. |
| Keywords: | 78 67 &minus n 78 67 Bf 78 55 &minus m 63 20 &minus e 78 30 &minus j |
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