Coalescence and electron activation energy in CdTe/ZnTe nanostructures

T. W. Kim; D. C. Choo; D. U. Lee; H. S. Lee; M. S. Jang; H. L. Park

doi:10.1063/1.1490634

Coalescence and electron activation energy in CdTe/ZnTe nanostructures

T. W. Kim
, D. C. Choo
, D. U. Lee
, H. S. Lee
, M. S. Jang
, H. L. Park

Department of Physics

Kwangwoon University
Yonsei University

Research output: Contribution to journal › Journal article › peer-review

21 Scopus citations

Abstract

Atomic force microscopy (AFM) and photoluminescence (PL) measurements were carried out to investigate the coalescence and electron activation energy in CdTe/ZnTe nanostructures. The results of the AFM images show that uniform CdTe quantum dots (QDs) are formed and that the transformation from CdTe QDs to CdTe quantum wires is caused by the coalescence. The excitonic peaks corresponding to the transition from the ground electronic subband to the ground heavy-hole band in the CdTe/ZnTe QDs shifted to higher energy in comparison with those of the CdTe/ZnTe quantum wires. The activation energy of the electrons confined in the CdTe QDs, as obtained from the temperature-dependent PL spectra, was higher than those in CdTe quantum wells and quantum wires. The present results can help to improve the understanding of coalescence and electron activation energy in CdTe/ZnTe nanostructures.

Original language	English
Pages (from-to)	487-489
Number of pages	3
Journal	Applied Physics Letters
Volume	81
Issue number	3
DOIs	https://doi.org/10.1063/1.1490634
State	Published - 2002.07.15

Access to Document

10.1063/1.1490634

Cite this

@article{106cbdaa9df444c1bf75ac0804a92ffa,

title = "Coalescence and electron activation energy in CdTe/ZnTe nanostructures",

abstract = "Atomic force microscopy (AFM) and photoluminescence (PL) measurements were carried out to investigate the coalescence and electron activation energy in CdTe/ZnTe nanostructures. The results of the AFM images show that uniform CdTe quantum dots (QDs) are formed and that the transformation from CdTe QDs to CdTe quantum wires is caused by the coalescence. The excitonic peaks corresponding to the transition from the ground electronic subband to the ground heavy-hole band in the CdTe/ZnTe QDs shifted to higher energy in comparison with those of the CdTe/ZnTe quantum wires. The activation energy of the electrons confined in the CdTe QDs, as obtained from the temperature-dependent PL spectra, was higher than those in CdTe quantum wells and quantum wires. The present results can help to improve the understanding of coalescence and electron activation energy in CdTe/ZnTe nanostructures.",

author = "Kim, \{T. W.\} and Choo, \{D. C.\} and Lee, \{D. U.\} and Lee, \{H. S.\} and Jang, \{M. S.\} and Park, \{H. L.\}",

year = "2002",

month = jul,

day = "15",

doi = "10.1063/1.1490634",

language = "English",

volume = "81",

pages = "487--489",

journal = "Applied Physics Letters",

issn = "0003-6951",

number = "3",

}

TY - JOUR

T1 - Coalescence and electron activation energy in CdTe/ZnTe nanostructures

AU - Kim, T. W.

AU - Choo, D. C.

AU - Lee, D. U.

AU - Lee, H. S.

AU - Jang, M. S.

AU - Park, H. L.

PY - 2002/7/15

Y1 - 2002/7/15

N2 - Atomic force microscopy (AFM) and photoluminescence (PL) measurements were carried out to investigate the coalescence and electron activation energy in CdTe/ZnTe nanostructures. The results of the AFM images show that uniform CdTe quantum dots (QDs) are formed and that the transformation from CdTe QDs to CdTe quantum wires is caused by the coalescence. The excitonic peaks corresponding to the transition from the ground electronic subband to the ground heavy-hole band in the CdTe/ZnTe QDs shifted to higher energy in comparison with those of the CdTe/ZnTe quantum wires. The activation energy of the electrons confined in the CdTe QDs, as obtained from the temperature-dependent PL spectra, was higher than those in CdTe quantum wells and quantum wires. The present results can help to improve the understanding of coalescence and electron activation energy in CdTe/ZnTe nanostructures.

AB - Atomic force microscopy (AFM) and photoluminescence (PL) measurements were carried out to investigate the coalescence and electron activation energy in CdTe/ZnTe nanostructures. The results of the AFM images show that uniform CdTe quantum dots (QDs) are formed and that the transformation from CdTe QDs to CdTe quantum wires is caused by the coalescence. The excitonic peaks corresponding to the transition from the ground electronic subband to the ground heavy-hole band in the CdTe/ZnTe QDs shifted to higher energy in comparison with those of the CdTe/ZnTe quantum wires. The activation energy of the electrons confined in the CdTe QDs, as obtained from the temperature-dependent PL spectra, was higher than those in CdTe quantum wells and quantum wires. The present results can help to improve the understanding of coalescence and electron activation energy in CdTe/ZnTe nanostructures.

UR - https://www.scopus.com/pages/publications/79955985941

U2 - 10.1063/1.1490634

DO - 10.1063/1.1490634

M3 - Journal article

AN - SCOPUS:79955985941

SN - 0003-6951

VL - 81

SP - 487

EP - 489

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 3

ER -

Coalescence and electron activation energy in CdTe/ZnTe nanostructures

Abstract

Access to Document

Other files and links

Fingerprint

Cite this