Synthesis of type-II CdSe(S)/Fe<inf>2</inf>O<inf>3</inf>core/shell quantum dots: the effect of shell on the properties of core/shell quantum dots
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- Journal Article
- Journal of Materials Science, 2016, 51 (11), pp. 5252 - 5258
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© 2016, Springer Science+Business Media New York. CdSe(S)/Fe2O3core/shell quantum dots (QDs) were prepared in an aqueous synthetic route. These were shown to be highly crystalline nanoparticles using X-ray diffraction and HRTEM, whilst optical spectroscopy showed that the particles exhibited highly photoluminescent emissions. A red shift in the emission wavelength of CdSe(S) QDs coated with Fe2O3was observed, despite the crystal structure of the core remaining intact after coating with ferric oxide, indicating a direct influence of the shell on the electronic levels of the QD core. The effects of the shell on the optical properties of core/shell QDs of these type-II CdSe(S)/Fe2O3QDs are rationalised by comparison to type-I CdSe(S)/ZnO QDs.
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