Synthesis of type-II CdSe(S)/Fe2O3 core/shell quantum dots: the effect of shell on the properties of core/shell quantum dots

Fatemeh Mirnajafizadeh, Fan Wang, Peter Reece, John Arron Stride*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

Abstract

CdSe(S)/Fe2O3 core/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 Fe2O3 was 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)/Fe2O3 QDs are rationalised by comparison to type-I CdSe(S)/ZnO QDs.

Original languageEnglish
Pages (from-to)5252-5258
Number of pages7
JournalJournal of Materials Science
Volume51
Issue number11
DOIs
Publication statusPublished - 1 Jun 2016
Externally publishedYes

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