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

Wonwoo Jeong; Kwan San Hui; Kwun Nam Hui; Young Rae Cho; Kyung Mox Cho

doi:10.1007/s10854-017-7665-0

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

Energy Materials Laboratory

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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 language	English
Pages (from-to)	17331–17337
Journal	Journal of Materials Science: Materials in Electronics
Volume	28
Issue number	22
Early online date	18 Aug 2017
DOIs	https://doi.org/10.1007/s10854-017-7665-0
Publication status	Published - Nov 2017

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title = "Tunable emission properties of CdSe/CdS quantum dots by Ce doping",

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.",

author = "Wonwoo Jeong and Hui, {Kwan San} and Hui, {Kwun Nam} and Cho, {Young Rae} and Cho, {Kyung Mox}",

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T1 - Tunable emission properties of CdSe/CdS quantum dots by Ce doping

AU - Jeong, Wonwoo

AU - Hui, Kwan San

AU - Hui, Kwun Nam

AU - Cho, Young Rae

AU - Cho, Kyung Mox

PY - 2017/11

Y1 - 2017/11

N2 - 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.

AB - 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.

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JO - Journal of Materials Science: Materials in Electronics

JF - Journal of Materials Science: Materials in Electronics

SN - 0957-4522

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ER -

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

Abstract

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