Tunable emission properties of CdSe/CdS quantum dots by Ce doping

Wonwoo Jeong, Kwan San Hui, Kwun Nam Hui (Lead Author), Young Rae Cho, Kyung Mox Cho

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Abstract

A facile one-step hydrothermal synthesis to prepare cerium (Ce3+) ion doped CdSe/CdS core/shell quantum dots (QDs) is introduced. The effect of Ce3+ ion doping on structural and optical properties of the CdSe/CdS core/shell QDs is comprehensively investigated. With increasing Ce doping concentration, a linear increase in the lattice parameter is observed, suggesting the successful coupling of Ce3+ ions to the CdSe/CdS QDs. X-ray photoelectron spectroscopy reveals strong peaks of the Ce3+ state, indicating that Ce is initially present mainly in the Ce3+ ion state. In addition, red-shift over the range 538–569 nm is observed in the photoluminescence (PL) spectra of Ce3+ ion doped CdSe/CdS QDs. Results clearly indicates that the PL peak positions of the CdSe/CdS QDs could be controlled by the Ce content. This study highlights a new approach to tune the emission of the QDs.

Original languageEnglish
Pages (from-to)17331–17337
JournalJournal of Materials Science: Materials in Electronics
Volume28
Issue number22
Early online date18 Aug 2017
DOIs
Publication statusPublished - Nov 2017

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