Origin of size distributions in ZnSe self-organized quantum dots grown on ZnS layers

Takehiko Tawara, Tanaka Satoru, Hidekazu Kumano, Ikuo Suemune

Research output: Contribution to journalArticle

Abstract

Main factors which determine the size, the standard deviations which show the degree of the size fluctuations for the average dot height and diameter, and density in ZnSe self-organized quantum dots (QDs) grown on ZnS layers were studied. By lowering the growth temperature the QDs average size and its standard deviation decreased and the density increased due to the slower surface migration. With the application of the scaling theory, it was revealed that the normalized size distributions were uniquely determined by the nucleation process although the apparent standard deviations of the QD sizes were dependent on the growth temperature. The influence of surface roughness of the underneath layer on the formation of the relations of the dot height and diameter was also examined. It was shown that the fluctuation of the surface potential contributes significantly to the apparent standard deviations of ZnSe self-organized QDs sizes.

Original languageEnglish
Pages (from-to)515-519
Number of pages5
JournalJournal of Electronic Materials
Volume29
Issue number5
DOIs
Publication statusPublished - Jan 1 2000
Externally publishedYes

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Semiconductor quantum dots
quantum dots
standard deviation
Growth temperature
Surface potential
Nucleation
Surface roughness
surface roughness
nucleation
scaling
temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Origin of size distributions in ZnSe self-organized quantum dots grown on ZnS layers. / Tawara, Takehiko; Satoru, Tanaka; Kumano, Hidekazu; Suemune, Ikuo.

In: Journal of Electronic Materials, Vol. 29, No. 5, 01.01.2000, p. 515-519.

Research output: Contribution to journalArticle

Tawara, Takehiko ; Satoru, Tanaka ; Kumano, Hidekazu ; Suemune, Ikuo. / Origin of size distributions in ZnSe self-organized quantum dots grown on ZnS layers. In: Journal of Electronic Materials. 2000 ; Vol. 29, No. 5. pp. 515-519.
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