Formation and optical properties of ZnSe self-assembled quantum dots in Cl-doped ZnSe thin films grown on GaAs (100) Substrates

G. N. Panin, H. J. Kim, S. Y. Kim, J. H. Jung, T. W. Kim, H. C. Jeon, T. W. Kang, M. D. Kim

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The high-resolution scanning electron microscopy (HRSEM) image showed that self-assembled ZnSe small quantum dots (QDs) and large nanodots with a pyramid shape were formed in the Cl-doped ZnSe epilayers grown on GaAs (100) substrates. The formation of the ZnSe QDs was attributed to three-dimensional growth controlled by distribution of the impurities in the Cl-doped ZnSe epilayrs. Cathodoluminescence (CL) measurements at room temperature revealed the emission peak at 3.1 eV corresponding to the blue shift approximately 400 meV from the near band edge emission of 2.7 eV in the bulk ZnSe. The blue shifted CL peak indicates the quantum confinement effect resulting from the formation of the ZnSe QDs in the Cl-doped ZnSe thin film. While the peak position of the donor-acceptor pair emission shifted to higher energies with decreasing temperature, the band-edge emission peak for the QDs did not significantly change.

Original languageEnglish
Title of host publicationAdvances in Nanomaterials and Processing - IUMRS - ICA - 2006 International Conference in Asia
PublisherTrans Tech Publications Ltd
Pages567-570
Number of pages4
EditionPART 1
ISBN (Print)3908451310, 9783908451310
DOIs
StatePublished - 2007
EventIUMRS International Conference in Asia 2006, IUMRS-ICA 2006 - Jeju, Korea, Republic of
Duration: 10 Sep 200614 Sep 2006

Publication series

NameSolid State Phenomena
NumberPART 1
Volume124-126
ISSN (Print)1012-0394

Conference

ConferenceIUMRS International Conference in Asia 2006, IUMRS-ICA 2006
Country/TerritoryKorea, Republic of
CityJeju
Period10/09/0614/09/06

Keywords

  • Optical properties
  • Quantum dots
  • Structural properties
  • ZnSe nanodots

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