Tuning the energy bandgap of CdSe nanocrystals via Mg doping

Woo Chul Kwak, Tae Geun Kim, Won Seok Chae, Yun Mo Sung

Research output: Contribution to journalArticle

38 Citations (Scopus)

Abstract

CdSe nanocrystals with a zinc blende structure allowed apparent Mg doping (∼9.8 at.%). Inverse micelles were formed at a low temperature as templates for the zinc blende CdSe nanocrystals, and paraffin oil and oleic acid were used as a solvent and a surfactant, respectively. The Mg doping was shown by energy dispersive x-ray spectroscopy (EDS) and inductively coupled plasma (ICP) atomic emission analyses. Although the particle size of the CdSe and Mg-doped CdSe nanocrystals were ∼6 and ∼8 nm, respectively, the Mg-doped ones show the obvious blueshift in the UV-visible absorption spectra due to the increase in the bulk energy bandgap, which is decisive evidence for the real Mg doping in the CdSe lattices. The Mg-doped CdSe nanocrystals also showed the blueshift in the photoluminescence (PL) spectra, and their PL intensity was comparable to or even higher than that of the undoped CdSe. This impurity doping using the zinc blende structure is suggested as a simple and effective way to tune the energy bandgap of CdSe nanocrystals and, in turn, to control their light emission colour.

Original languageEnglish
Article number205702
JournalNanotechnology
Volume18
Issue number20
DOIs
Publication statusPublished - 2007 Apr 23

Fingerprint

Nanoparticles
Nanocrystals
Energy gap
Tuning
Doping (additives)
Zinc
Photoluminescence
Paraffin oils
Atomic Spectrophotometry
Oleic acid
Light emission
Inductively coupled plasma
Micelles
Oleic Acid
Particle Size
Surface-Active Agents
Crystal lattices
Absorption spectra
Energy dispersive spectroscopy
Surface active agents

ASJC Scopus subject areas

  • Materials Science(all)
  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Tuning the energy bandgap of CdSe nanocrystals via Mg doping. / Kwak, Woo Chul; Kim, Tae Geun; Chae, Won Seok; Sung, Yun Mo.

In: Nanotechnology, Vol. 18, No. 20, 205702, 23.04.2007.

Research output: Contribution to journalArticle

@article{0a85d9906c5a4014b4aee1a42ccf9be4,
title = "Tuning the energy bandgap of CdSe nanocrystals via Mg doping",
abstract = "CdSe nanocrystals with a zinc blende structure allowed apparent Mg doping (∼9.8 at.{\%}). Inverse micelles were formed at a low temperature as templates for the zinc blende CdSe nanocrystals, and paraffin oil and oleic acid were used as a solvent and a surfactant, respectively. The Mg doping was shown by energy dispersive x-ray spectroscopy (EDS) and inductively coupled plasma (ICP) atomic emission analyses. Although the particle size of the CdSe and Mg-doped CdSe nanocrystals were ∼6 and ∼8 nm, respectively, the Mg-doped ones show the obvious blueshift in the UV-visible absorption spectra due to the increase in the bulk energy bandgap, which is decisive evidence for the real Mg doping in the CdSe lattices. The Mg-doped CdSe nanocrystals also showed the blueshift in the photoluminescence (PL) spectra, and their PL intensity was comparable to or even higher than that of the undoped CdSe. This impurity doping using the zinc blende structure is suggested as a simple and effective way to tune the energy bandgap of CdSe nanocrystals and, in turn, to control their light emission colour.",
author = "Kwak, {Woo Chul} and Kim, {Tae Geun} and Chae, {Won Seok} and Sung, {Yun Mo}",
year = "2007",
month = "4",
day = "23",
doi = "10.1088/0957-4484/18/20/205702",
language = "English",
volume = "18",
journal = "Nanotechnology",
issn = "0957-4484",
publisher = "IOP Publishing Ltd.",
number = "20",

}

TY - JOUR

T1 - Tuning the energy bandgap of CdSe nanocrystals via Mg doping

AU - Kwak, Woo Chul

AU - Kim, Tae Geun

AU - Chae, Won Seok

AU - Sung, Yun Mo

PY - 2007/4/23

Y1 - 2007/4/23

N2 - CdSe nanocrystals with a zinc blende structure allowed apparent Mg doping (∼9.8 at.%). Inverse micelles were formed at a low temperature as templates for the zinc blende CdSe nanocrystals, and paraffin oil and oleic acid were used as a solvent and a surfactant, respectively. The Mg doping was shown by energy dispersive x-ray spectroscopy (EDS) and inductively coupled plasma (ICP) atomic emission analyses. Although the particle size of the CdSe and Mg-doped CdSe nanocrystals were ∼6 and ∼8 nm, respectively, the Mg-doped ones show the obvious blueshift in the UV-visible absorption spectra due to the increase in the bulk energy bandgap, which is decisive evidence for the real Mg doping in the CdSe lattices. The Mg-doped CdSe nanocrystals also showed the blueshift in the photoluminescence (PL) spectra, and their PL intensity was comparable to or even higher than that of the undoped CdSe. This impurity doping using the zinc blende structure is suggested as a simple and effective way to tune the energy bandgap of CdSe nanocrystals and, in turn, to control their light emission colour.

AB - CdSe nanocrystals with a zinc blende structure allowed apparent Mg doping (∼9.8 at.%). Inverse micelles were formed at a low temperature as templates for the zinc blende CdSe nanocrystals, and paraffin oil and oleic acid were used as a solvent and a surfactant, respectively. The Mg doping was shown by energy dispersive x-ray spectroscopy (EDS) and inductively coupled plasma (ICP) atomic emission analyses. Although the particle size of the CdSe and Mg-doped CdSe nanocrystals were ∼6 and ∼8 nm, respectively, the Mg-doped ones show the obvious blueshift in the UV-visible absorption spectra due to the increase in the bulk energy bandgap, which is decisive evidence for the real Mg doping in the CdSe lattices. The Mg-doped CdSe nanocrystals also showed the blueshift in the photoluminescence (PL) spectra, and their PL intensity was comparable to or even higher than that of the undoped CdSe. This impurity doping using the zinc blende structure is suggested as a simple and effective way to tune the energy bandgap of CdSe nanocrystals and, in turn, to control their light emission colour.

UR - http://www.scopus.com/inward/record.url?scp=34247473058&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=34247473058&partnerID=8YFLogxK

U2 - 10.1088/0957-4484/18/20/205702

DO - 10.1088/0957-4484/18/20/205702

M3 - Article

VL - 18

JO - Nanotechnology

JF - Nanotechnology

SN - 0957-4484

IS - 20

M1 - 205702

ER -